1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9241a6926c9c3f3be1e9e681cb343ffebc43ee0635310f32c266bbcd49cfa6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47c425b4-93ca-4643-8c30-f839013c852d.json and https://artists.proofprofile.net/proofs/artist/47c425b4-93ca-4643-8c30-f839013c852d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b3e8af9251cccd18e7cd4107f008a883a726bfc56d664ff03ced520fa4788. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM71904168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a50550d20eba15f1c845dc5b47ad5c23fd28408f36679ec2f55b9dcd034882. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM71904170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a82d014a43d7d6a7ef55a015d1bd1648ced5f97a13553e878af2128675e462. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM71904173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774026c2c2a7fdb645dfca24cd0d28d10fb832279688c3e6342ef79667e95b1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXUM71904175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921949e04678a2a91404553e4b91ea3d6430f7a7f3e07c391ee24be1ecc90751. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031916924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fa74e24fea2025c30e84d396f1726bff8ac6449f906943d31cafb8a4017637. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031916932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa145a19a7d4c9f2acaa138e34c6beb4e29c47f0055359e5405ac04aa3373314d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031916933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0447f2ab0178a1a83102330b036e201597ef005e711fab226bfc6c62ad7d55. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031916934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b44e12a1ca8c58eb229188259909f2c5e125a582739ebe3746f1ab14daef25. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05f1e502e68f3e961be37210b5965b6853fba972c16c99cc6e40002089ebf3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa1bff73ba4c2e815f4f9d0d1a24f05f3e9785432420a33205741821af70059. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27064a334e5de584124b1db2d4610dbd113d092ec3457db06884853c3be9803b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c72bf9cabe85673bd4cc76b4a79d5b0c45fa052c5201172f31d58f02f2009b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b8fe9edadc5f37ccfc72c4a02a5a3efa9bea32705ed6d19f81eca4e11da79. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21945409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f8132c7c3ee7988d8bae2c1cca3fd3629bd21cc5f8bb94717d8e070bfb8dd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21963590.
Desde Aquel Día en Que Lo Dividieron Todo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22dbcfc564f1a8c0631d748e49516956bff479d3b8dcd3c30438ed144a4254. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:45:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21963595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c471d8d446d910341f9d4d01b1faa0864a6db423c75f8b9d48b4e6c2401409e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21963597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2171a2b91d588fbed959f1f835e5cd7acc09d83fd49c8e1c2cb1ca70cb9aff. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77b02aa170cd59fc268308803b09cb1884dd6800392a2270c63b4a194e317e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5ea4fb850be72fc4005c740371d065175ca5e766ab3bdbe62f780479ab57fa. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f50345223659ad9ffa8aa6ffaf4ffa37348d51f4c3fa5786bb132decc3538a2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854316201ecbd94facf6f837ff73c658b88bd7bd3cd251a248931fe49eaa0beb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6405c22446340cded7bd5985bb6c908e5a222dd8d429ccc54417b8962c46c02. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21948646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012aa5999a27f7a5fdc530099bb2e096c8913044f0bc53e33f945689d70576d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd49b823d41c03c0c13a020711b9310d8e3a8a2e650b78389663479d7a603501. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf210fdafb744f6983801fe7b68a1de3da257c2e91a9cb2ee177134e93ace16e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d074ac3a057b9ca77ff31a4f4f4425e925161cdc17349c854a66e23874f0910. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16783cb38072652691727446bf011df4977b2751e81a54a35f7a90184b059fc5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b95d24cbbe233721a0caf0d9ea7c3c7e0efa01a787202927104dee226b79ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea73c7c1f24dcbe97a8f941d950c3f1d9cd09cc43001d89e3365c18e2f8bff5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1904109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361253ccd97423e06e55659ed0e15656ea866af2526e7ec06f63d74ba5eeba48. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2462990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae5e09f08903baa43bce4786788546abb39198c9ba9bd5bbd66c74638171882. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P2462998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50871b98c1bcd780f6d6022c6e33cd66bd21ab27885deecf35e60c07c3851e72. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a5aaf52251c8b255e4d1c3b34285e92d1e6b250929deb759d88c1043b39e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad14a8d1436ecb6ac4d96b3c02fffbfebf09f1550af83bf91eee93209a11d4bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935be948ad1a97e0b2bbbd15a52c497d8efcc6fa964aee9a0e31eb24412b3a94. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552468.
Playing for Change 3: Songs Around the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20f905e7f68359469906211fa8096f43846511fb7c27d7aba07632d3dc2165c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMHW41400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4220c262562a62f17157d5d633b90e744f46094dfed724954599e63ce3088f05. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031431430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4df7c49b9cddcb8088a73d132d31e8e57e9a1f90ffbb58a5e78bf26570162. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDHM1810329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f588b7701433d7dc72783d0c1a6bd69787fb2794583beeffb20a022022ed1e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5029500398.
AMOR Haydée Milanés a dúo con Pablo Milanés (EDICIÓN DELUXE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c886b5020192a3cf91c2f0e9c205751a57308bf24f551c560634f4a5efda2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX3741900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18760618a6820395c92600faf1c074b32e2861f204477d00163c569352a9b0e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300713999.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f57d4e21c690504ef351f6aab3e4af4a0364e22effad3d6a758b2719be93d5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1514560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb726176e8c9ce51e02e6efbbe4d5655bf2c65d53f481947280bf1ad5dfa0b586. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6100678062.