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 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 0x7ae85081ca6a0b0e860a69a8a2a0e4c448b3f8e0a9b34735c43838b25c9f08e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a4f041e-5a16-4e03-945c-ad47d3c6ae8c.json and https://artists.proofprofile.net/proofs/artist/1a4f041e-5a16-4e03-945c-ad47d3c6ae8c.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 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 0x051cdd2dbc60059bca0943a1dc8bf496bb8e1043075ee047fa0fc9f1d896860e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA62336813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecea4c1ab18d60a30ea9f6a17fbb6b72bc82d53372dd017173d2b4c78d1ab16. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZES52319480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa0aa9e7ad3303aa5f8eae82207ed8925f190cd57baf85d6ae64a65aad5fc66. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GX38U2108708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368d26a8774c22aff0c4a6f1efcf613b3a3b986c32472bf8a7c70904161b618. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GX3HH2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309751a9f67ba722149c80276a40dee9fd784f14d993b74fc8a10654c2472251. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX3HH2167536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30fbfb4a7723e7feb4f79954755b9c00d71d18bab61efb94b9c213386f340a4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX4R52154842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6716131911b160a67da5d912411ef56f5421f170cb3a358e4b9a56e3007d7f8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX5MY2157051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ac4c0051feb85de4c56a3598bc4116b2d13628c74a6a00918cc52b75a6e70d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU0094781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805ad89cca8bf4be1452fde3ccbdf4538fd33a4dfc12339933f62217cb3f169. 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/GX5MX2172143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64bcd2410055fbf724b64aeaed2a7357a1242959e86bae08ab905661220db0. 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/CH6542200949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18095893b91edef7c1d4ff83944499e235f4052d3c4b2d9f180955ef54fca64. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH6542209071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69f40f8e0438c5819b561db88ee4f590b32c736e07075fa0442474e22221145. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH6542225951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef128ba5549c5cf56dec59d8341b58d0d71e3cd7b5f71418f2c370071345fba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542238584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67abe42a2b69b394dec07b39f264004af48ec436441d249b6c280c71543c469c. 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/CH6542242582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39179e5219ae584ae2fa9844079418cbe4fc50906aca9bae7af1a9a2e29c9d3c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GX4R52178001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8cfb3b8c63b6fad1e2c1cb258d86f5c84184e701a552be89fa0a7c21767915. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CH6542275015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52e638a15caa90a44efd53ffcacb0d8155a123d18d36fb540f0b384dd4549d. 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/CH6542284435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1442ce6ef41563d589e6f6843920098acfe1dff61fa69ffd1bbcc49017d628b4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542327356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8d36185c6ec90b0b880dfe0ace49f6b7ebb2cd8f40a97b1e367dcdfcfa897. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542340804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c45b603d5951e8f87bac9da31d9574d4c7054a618c82230bb259baa575b1c3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CH6542359916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d86175761e536fab597c0bba7f47aa1747080950d9ae28ea5cc775de4d5676. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542389064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f40a24ad854d0ea0de9b657ca3ceee1e76136db29fb462d2b2bda9b94d511b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/CH6542390024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbf599ac0ec436bd9a4a3fd616b3b5700eddc5faabb2555b72346307636d80. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/CH6542412906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9930baa5a91db95dc7c71ad7d728cd2080394675f8f88f530bdd759517335a39. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH6542420651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd951cb62d37d9365ae4049bc687ae0ac7220fdb3938ce718208b86df4ca1fa14. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542440392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8e5611c3687018f85ee3ba6a04108f2267c8a22c80b01321d37e6c4f70f697. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6542447826.