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 0x39b43b19d3b175db112ec0ed255d5b054582f2fdf681c6d74ce6c065ea2c7d04. 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/9559d9d1-1a3a-46a4-9c12-bb555d713bf5.json and https://artists.proofprofile.net/proofs/artist/9559d9d1-1a3a-46a4-9c12-bb555d713bf5.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 0xc5f974108f43a8ec9c6d377129379e3e9374f51fd6813ec9689493645dafa5bc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMFME1319110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e62067967f60cf3389963040138dac8b6afabfa1988fa3ee14a555e9b3ba6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFME1319113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ecb5df8145fa2354e664784f6ca2188c119a9e6d5ab6b58ba51b2f445509e0. 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/QMFME1319119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4da086005d3521ec9418928283db7f3b1e4b06fd4b539ded351a4d3917ee583. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QMFME1319122.
Old Celtic & Nordic Ballads (About Elfs, Fairies, Trolls, Dwarfs, Dragons, Mermaids...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc829111163391936f802b73aaf9999ae5c2870821a5e2a732921555e750cc6d1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:57Z), 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/FR6V81748956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42203f753e495c569b93748a5af5ca10c21b771008411f38a6355f59a31bd9d4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR6V81748959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2eeef6d698ad87e6c558cc0fea301e7a5d8c66dac5d88474357b6f9f3c6f93. 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/FR6V81748960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38781a3547e2defec1d386d463537ac15a7d3d4457884152773b680fb870b25c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FR6V81748961.