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 0xd08b07ba9b056139751a3986aedfda43a8c3b8de6b16d651c3de23a50756fb5d. 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/e7ba1543-2f29-4a54-8398-d645035bad13.json and https://artists.proofprofile.net/proofs/artist/e7ba1543-2f29-4a54-8398-d645035bad13.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 0x06dff0155f3e0f573644bee61aa4902084d75bef0d243d5eae680a4458ef3514. 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/GBGLR0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3aff4741f03f83156640b3a2febc1c5a8d837ccda6294ac2a9a074e94be102. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:54Z), 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/GBGLR0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a04a1dfd79e659d985c630135cd5ee18fd4e0591b8ddd56b1bc47e50d95ad. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBGLR0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa571ec324668a95a2d26a353e597ecde7cbc3184beead69252ab2926d04d202. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBGLR0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd27fd9742a24c96b71e4fcb4de24497a0a48d9f0d70f7023476745ff248bb8. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/GBGLR0800019.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb2dfd2e828063623340d890fc2cc351e0f30656959a6974c579c9406eb4828. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:07:05Z), 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/GBGLR0800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241cdcfac4c82fb6063f6929afeb36243d55f973f1f3c2067a83a20449034710. 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/GB9VW1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945a967c33efdc85a875389b61250ad4df78a53b0092f3a575b9d3f1f8d7f887. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GB9VW1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250b5d399ffd731d872e518ce87707c854a8c88bbb496ebcef72558ffdae5f1. 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/GB9VW1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a3b7485b23514f1a31b03bfe386a2d6a6573dfc4221fca14bc38b8c10ea21d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USQY51480827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f5668e412cc6366b57d3238a06124247a482d6dd0a7ef4688ab7ccd0950b1c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IT2XM2300009.