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 0x66afa6ea39bbfa62e398028b05be82ec3c139f9fcb078837cfda57c28d4420fb. 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/0dd1fe22-47b6-4a13-ab00-0e9bc3e5f2df.json and https://artists.proofprofile.net/proofs/artist/0dd1fe22-47b6-4a13-ab00-0e9bc3e5f2df.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 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 0xa52944689de6899366816304e77d86ed1573e6d756fbef6d4c6a17127df1f0f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2192092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18899f02e3e53e447b12878dc0451a11e8218bfa84487bbf451951217cb2b77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2192274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff45bdb05d801c2392e1a553fac4a6005c3ccdb683dd54f0eadf80cdc347b666. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2192277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac52f2a76458fd9a8bae1e635d90bf4b1fa34e913e58e13d79d9befa8242936a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZW9K2455661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49644ebe1598209c74c2c4f27b1e38849d0c04d9907e80d8d011d97f67eb0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9K2455664.
Casa en la Montaña 3 (feat. Cozy Cuz, Fntxy, Muelas De Gallo, Yoga Fire, Dee, Nark, Seven, Phul King Fu & Blaze)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52944689de6899366816304e77d86ed1573e6d756fbef6d4c6a17127df1f0f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6MZ2192092.
Así No Más (feat. Nark, Dee, Cozy Cuz, Muelas De Gallo, Seven, Yoga Fire, Kamaro & Akasha)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18899f02e3e53e447b12878dc0451a11e8218bfa84487bbf451951217cb2b77. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2192274.
La Báscula (feat. Yoga Fire, Dee, Seven, Nark, Phul King Fu, Muelas De Gallo, Fntxy & Tocadiscos Trez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff45bdb05d801c2392e1a553fac4a6005c3ccdb683dd54f0eadf80cdc347b666. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2192277.