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 0xcfaf05769559b1810da7ecbff3264cce4e7940821685a196530f8cae1e908b5d. 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/ea8931c4-b904-4cb4-a23b-35630d99574d.json and https://artists.proofprofile.net/proofs/artist/ea8931c4-b904-4cb4-a23b-35630d99574d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saturday Is Seven (Good Neighbour Remix)
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 0x49fa0258ccc2bdb8c4f1e63acada1bd255adfb873bf44e8c5ec3a1b8e86b6f09. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA9092300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b84500f3b93714800ff6622aeb22916b2c035db701d7c1da3df42ce3b27036. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CA9092300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23ad2bee4c27704afd415ea0580e00ad99ecd0e206cfab212c732fcfdf8ae7c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA9092300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4e61172a6fda3e524fee393984df7e47ec7310fd1ce5d287958aa6380e6a83. 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/CA9092300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbbce9ae45f42544c2d1c723b75781117697907fdb92d3d4bb180a43e575075. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:56Z), 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/CA9092300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9fd612244c9f668b20a3f3cbe3ac9cd03da600870904e2815a4c777c18f7f9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA9092400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2afd0848c2cdbe31b82d2a5160f41099bb67a4b63d9cd5568ffd8d63927378. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CA9092400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9c47d884d3150bc99a47b0ee03b604fb51a62ff7d2963ac06d724dd6718a7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CA9092500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec463f1dc7beeed8d39223562d47043f9422eccfd7f4d7f27384e0b818fb67. 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/CA9092500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f1d665b1da961be8fab335e6c1328634b9c51501eeffcbb6d7dcf1cceb517. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CA9092500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2afd0848c2cdbe31b82d2a5160f41099bb67a4b63d9cd5568ffd8d63927378. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:02Z), 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/CA9092400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9fd612244c9f668b20a3f3cbe3ac9cd03da600870904e2815a4c777c18f7f9. 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/CA9092400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a890b4ac6bdc961b501997731e4055a5952569fc303b64da6f4dd1563838dc2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CA9092500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f5132cc0df180b46d3f980ca96511e2ea74320af66fec151a2840d68a19d25. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CA9092500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cae139e9ece49c4fd06eb992646707899d40b03b171af8df0729264cf27b3d. 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/CA9092500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7868a2345bea93df725b58e7147ef064ea1d6b1caf88c182c9c0037184e62f9f. 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/CA9092500008.