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 0x00f6fa05d220ce6234a5f436a4235ee4859666cc33afadcedc2e55f2265f48d7. 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/d47a02c0-eedf-470a-aedd-cf6eb51714e4.json and https://artists.proofprofile.net/proofs/artist/d47a02c0-eedf-470a-aedd-cf6eb51714e4.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 0x522762e656c9c719d4d420d94a54cd6b1d68d837bda5039c6c84dca85801b67e. 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/QZW9M2208066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af591d97162fbeb6472d516c61e92c2a76a7e93e18047587f75ae0d2f1e8249. 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/BXG5C2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cf72d5afa4ec42c8dd386475bdde1af22ada259f72522561e77036e3c24412. 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/BKGP92300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be177bb4f6b2bc869d5df30d863aae12e07cf34b75ce7f45978507656f4c9f7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ972426393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d510964dd98cea7b8cf7a6f89cbc21c674a42222c2117f2bd725849a907b900. 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/BKGP92400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97112a9f66835c18dc5c20ce6b6e6a6db8a73f31a64e6408f4a2d73e804a067. 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/BKGP92400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3b6732e6316a244fdc2d9e7eece32b6ef1d4d473c24ee06ba0cf625f8a74fb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:19Z), 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/BKGP92400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00658156c9a34dea82420e7f463e026ac3aa7a5e94ec6bebdd29f3d404f9d077. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BKGP92400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8422a2459323a88c9ae2f9020415bac2fa4648bfcb0d474f2f3442a3a7a25d. 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/QZW9L2406316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe411c7b177b46008d0a3c6cc4498c0d0f699f179068273db4b297f7d9a9c9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BKGP92400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488287616faadc419b91353551b0c1c6ed403e082ee405d105f8b771553026e6. 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/BKGP92500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97daae7abf338b348089df40b2e91cb3ec4692ab4bb2cf237409c46899d15b1c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AEA2W2566801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa076bcb18727407a587521fb81a820b0992449b1c6b61518e5e6f33627bb9784. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BKGP92500145.