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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fdc57c0a2fe104edc4e38a5b854650e865744b4f2458e1e8e3b613033f2a75. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfd1daa2-15a8-4edb-b5a2-da071d499418.json and https://artists.proofprofile.net/proofs/artist/bfd1daa2-15a8-4edb-b5a2-da071d499418.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2013496facfaffce370cbfca350272378d103e46df24c9ca202741e184edea78. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USL4Q1805211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d05a130a49ca698bd9904fc6390a4db38d7efad64a8eb3f723d8bc98a25713. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:12:22Z), 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/USL4Q1805212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812cd7b1ff29fe641a1d043f68747f94c22b9076df77c507c707b8989a61acd. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USL4Q1805213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af69c6b202ea58aa9efa33b01a953cc9d2430e140f8ef285382a9f2891b9f1d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USL4Q1805214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648e3293bef0f93e6537f82e36cf2eab6310cba584afdd968b4e52b70c8b093a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:59Z), 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/USL4Q1805216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e9de91f85e7c714a346e6587d7e41767e006b26530910232c537881cdb6068. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USL4Q1805217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be40c36fd1661a0cdaf73101ef16e7a094ff23ee592dc5401fc9494f13f744. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USL4Q1805218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaca500a988d494146497daaaf5aca79ebfbdf1104162d0aae34cd853467f44. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:25:09Z), 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/USL4Q1805219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fe097308aed91fc55798723e8692715cd9fc64dd953262b039f73cd42ea891. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USL4Q1805220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648f54b6d767fa5a19386cebff8db4ca5903e0c9efdf237994de9fb909e9fc10. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH2124430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4c912562210305e9506669a05a24ba6607334fdd478aecbd29b93f9d604d4. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:00:22Z), 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/USCGH2321504.