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 0x376932653da287fcca436f2dffe4efb2eddb568e7f8d75fd0f100d998e4fdcc6. 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/f0fafc18-b192-495b-93d5-ef5749625087.json and https://artists.proofprofile.net/proofs/artist/f0fafc18-b192-495b-93d5-ef5749625087.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 0x3f19ace0b21765928cddc05fb7c6d91683d7679dfa42b72e6246423e6572d04e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:21:10Z), 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/ES71G2228664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014122cb2a7af0c4a219632efc25fc114be4f4263552b028aa5cf35b23fb054. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ES71G2228660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe22d912a633264aafbfa96b2d184fc5e31e4af56ad38e775529854c1c774ec. 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/ES71G2228659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079b1d8dd45cef5da5e347dc419bc261a6312c2192544b28b0b770fca02bb348. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:03:36Z), 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/ES71G2228666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf014122cb2a7af0c4a219632efc25fc114be4f4263552b028aa5cf35b23fb054. 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/ES71G2228660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25121856e48ae1bf57c725a51b414852b1d5f2b43aa72ae7c83786b4add9548. 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/ES71G2228662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57cb1706f2d6ce2dcebe6f8ad2514546a7ff45b52a116cfac0fa581f4da7c7. 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/ES71G2228658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf170469f9ea78d02c5f577e3e94bbf80eeaf6ddc431f0d3c5ee54678ec60c4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES71G2228663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7835c2f7efd63cae5310768f1a738e0ed069c000594e4a990f854693e8a547. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/PYC842303724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1fefb2b6f4e183b90bae63390b9c31b9b20604fe90946e07606251a5b49d74. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/PYC842303731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce92b24858cfd03df05351e98dfc2ff0a6719dde4c4f52fc6f7a36e8ed907d6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PYC842303769.