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 0x4dc5f051f8788312e63c54e4f6fee99c9e62d63f685afc8baa669f7b7d439b8d. 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/d8ec94b6-e9d5-4c9d-89fd-8dbf183b1ce9.json and https://artists.proofprofile.net/proofs/artist/d8ec94b6-e9d5-4c9d-89fd-8dbf183b1ce9.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 0x5057f03f4c94fc1d753ab8f790a0c650e8bab8a05d5a4e96932eed9e837a6fff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5151503259.
Réquiem (with Niña Pastori, Arcángel, Miguel Poveda, Rafael de Utrera & Pedro El Granaíno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd8eac5f3db12969a607890ee68f8bf10cede8ac3824011b969f938c7842226. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES5021602637.
Las Cuatro Lunas (with Pedro El Granaíno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5231d9574b2eafd1abc37902a1fb0f42dc698f9dbd16928ad578f13de5ac4d77. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:10:35Z), 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/ES5021602636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5231d9574b2eafd1abc37902a1fb0f42dc698f9dbd16928ad578f13de5ac4d77. 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/ES5021602636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd8eac5f3db12969a607890ee68f8bf10cede8ac3824011b969f938c7842226. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5021602637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c644c6a72e24467bd5d0354b88ad456b360f03fd284f050a1777e191037c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6102200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c0f3b2ca600136e473647683a0195961e8460733c0bcf5e19d59795f6ec7d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES65A0800596.