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 0xd5d6f5e8fda7ba10d85b16b7479819d019c38945a17bc1915da81f00bbd023f2. 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/0f6314cb-207f-4300-8421-ce6a76f522c6.json and https://artists.proofprofile.net/proofs/artist/0f6314cb-207f-4300-8421-ce6a76f522c6.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 0x8185bbf323d4b1e53848cb1631281bd3f3b45a44c4ee281f3ffc453565f8475d. 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/DGA062021063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfba2640e4884c659ac54d6a593a021ab6fdead1908ad369425bd50e4183366. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DGA062021100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282ab33fa478f20e2490534d29f77dbe072b911aad9acb3c9d978816f713a19. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DGA062035058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb975db1e5f0a2e9b9c2428bb1e0145455faea64cc7581231554f58a4faff381. 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/DGA062035060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5e02e13389e0ee26326e1c9518bc86988718cddb066fc4677dc1fe233546c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR10S2132191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae80ee1ea7ecafec74b82ed48195e2db6c251fab8ac21b6197a51b7684bcc3b2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:15Z), 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/FRX762260118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa60c4549deeb673f1807c50800e6cbd8e4e7500aadd42c38e401dee0ee2f5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR59R2316624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c07dc3ffc384acdb6e0e6740584b78d9d228a013c148ed494cf92454eb697e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:27Z), 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/FRX202362698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74ee29a542dd2dc071eb89519479c8d849447f03c727ed45ae883a1f534970. 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/DGA0Q2342133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afe7b5310991e1fedb51bfc8b494dfe573c76c40bdac09fc31ad4d5ff752bab. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:04Z), 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/DGA082452030.