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 0x903f3cc7ad3cc07896745bdca647a697a59518969f9640b738349c79653d0bfc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/511e60dd-f6a5-4870-9df3-263863ab18b8.json and https://artists.proofprofile.net/proofs/artist/511e60dd-f6a5-4870-9df3-263863ab18b8.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 0x04b8445d8536f0d441cb0cbfa3d9062cebc88e717549f408beeeb153127a803f. 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/TCJPY2498662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e623657ff7fe86686a569b5b8e3666573ef89bfb7fccc7ca7d6991a90d01b6d. 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/TCJPY2498668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c1653a888b07b04ded2b2708f9375f441440ee43e3385955f49d348d630228. 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/TCJPY2498675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda73fbb678b65c0ebc3cf360a53355ebfc93e9d4f163e752b6f45680f7693c4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:26Z), 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/TCJPY2498686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a455146f26af05816440c70aacf0c85a684b42dbdfc75931d409f2a01d2d935. 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/TCJPY2498701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6599a9ed42852287a9e62e356c232f0de74f8e824e1fdbfaff940c9c58644a. 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/TCJPY2498709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f018ed7a09e5c252568f8ba023ddb92d1a221cdd719f6f5453f82706e8fa5f9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:17Z), 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/TCJPY2498718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae28fead1b524d178c9ad6a3215f26a8fd8203d136495880b3fef6d17430a5. 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/TCJPY2499086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0bc019461933f6e006adc62c2d1c50fb2ed7d5311d17c1cc3e19e656557fbd. 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/TCJPY2499087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd6027e72b1360c98e5302b6d0daa34d6832c82c132fe9135707433cdfaf6d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCJPY2499097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9b7cfcac8ccfb9be694d3757682335a264d34f09e0bac0896ebb23799a07c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCJPY2499098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66391eb4922a3afbdfbf5dd6b9971c5931d5612a1e2c4329b462ede37036b17. 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/TCJPY2499142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c4567a66a414970faa7da7a1e68653a065f230fc2dd4f8cf48b98737fd9557. 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/TCJPY2499144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18585140400b700bdfa678795f7753ba8698e6c0157d30ddc3f69f5e0c3d8f37. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPY2499154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15303899aaf210612944bb459d91a3d87e489899eb2cb7ba1fa574ceed84075. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPY2499183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6385104b36a168b4d7712cabe5d50865c4e6bbbc38934393111e6d4f139553d7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPY2499189.