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 0x33259c143cd826f37f878f5df1969a8b4e6adfb4a785f2c1536ae6dfd5deff8e. 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/81ca53a2-cacb-4020-a955-079e650eb432.json and https://artists.proofprofile.net/proofs/artist/81ca53a2-cacb-4020-a955-079e650eb432.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 0x29f112e9b0cacd22388959817ff65998b2a4fbf00f8448e0f2a6678fc6794634. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/AUMEV2477570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa1bfe34cf8e10b4b60bcc3d79fba575e2d71844b42805a1da01ef430edf5f1. 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/AUMEV2477565.
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 0xa41648dc80e12b38d9bf03d2240d67147c0a325b3821bd77526303499cabaf4b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/AUMEV2477566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2050dacf27f2acdefe8256535be168d47688d26da971530da9b9d897bdc83277. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AUMEV2477567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4efd67efffa3d0d141182b4fbb26a67b143ec43b04b4f3fd6ec25ac39027fa2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUMEV2477568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0109ebefd932f796d722579c3ad04236c3ac37c0aeae5637ece66b7d3fb37ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUMEV2477569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5e001878601994036d75292ce19743975081acb04fb97629525afcac1b8917. 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/BRUM72400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6383cf0c233196221a11ba7661bc27790f6b920782046d9d6005b43fdc994b. 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/BRQT62300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d61310d9691cbb0876d396f3c676498b42b3f98e34a3ffcd3259a44503471. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRQT62300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf70c7a00475b6e6981f5c1052f38e2b48e33ba3b469b2c60284f5f134b561c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL1ZN2201889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d0c22c24e69c43666050f1eb2f3e7b2c6a23f5f3d3b218322cdcd40833b405. 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/US83Z2216127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c316da2083ce870ea746f07e5addba875a2ea279f5e74f46d61766e009e2de8. 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/US83Z2216129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765b7628d0b6ef43351bef2a28d67edf5595ee1938548d35aad6c10e952730e0. 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/BCVP52200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4abff426d525f3c8e37931e9d55bce6a06346c67fe33b01b8c2291b2a31b28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCVP52200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4a933074857885f622e29836758abdab83892e1491293ff670c1ba6ff4b4bc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBLV62124930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b4fd5dd11bb5ec6cf212b85f5ac800544484ba6570f315a8bbae041b85be5a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLV62124933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c22fb2b6a00a85ce6426483f8cf93eafb78bc0b5f7e679b767dfa17c22993. 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/GBLV62124934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aef5664fa0060b8fa79445624a1527558f08e5922f88bad321066760a40208. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62124936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe507d41976d15c7ea16b2201c970aff3d5cfdf9a29d7107c5e0c3faa7ab930dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62124939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a998de90b17c3239cfc05b8dbd6c44344aa1ef6915ff607d4b88b221b3a18. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLV62124931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba8d8354fb4b47820f7577aba2c3f449174b8c0aec73314b72ac2fe1188bf1. 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/GBLV62002684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7298cb0e4d0639385bbf846e0cdc6a40b58bc0f0607e35c3a6cd51656d8f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLV62001732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7bec549b93863efa26bce495d8c1c791ae42bd5430b93924374e297c682f89. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62001734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a12c68dd16deda074645c9eb9380cd27ec1b54d0a1dab58b035fcbc614f7c5d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBLV62001735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5cd6c3c8d9c066bebae2a537c75a03b23d385421ab0c2b30fa33156ed29003. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1489893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782be8f1a139740e288454431a8110731a43748a1856df2324accf0941b1ca28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1489895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2188e4cc083dcba1d999522edbf1aa9b3e0c6b8a6f857242da5be9395826ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1489900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ab99939a35d45ddaa7b5f6236e186531afe205e2c2ceaf41bfae352dead95. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUYG1489901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaffe6b93a7b9878d83e4f3ca58d22e49bcdf672cd26333e30c74cdcb069f657. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1489902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd924521cf5c59aa3d5dde1e0ae17ea52dfdfd146fccbf34342f31949f6ff430e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBLV62001740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3847a1e2b3d6de8b85d4af070899e5bf2c9f558d2711bdc280a2e79ec08d4. 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/GBKQU2259257.