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 0x4ff57528bc6ff2d3aa9ccb1c32aeca8c9fc4ca5efae88e809170293fb49e62ca. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6595a35e-6ad3-493d-84ab-ee1897a00dd9.json and https://artists.proofprofile.net/proofs/artist/6595a35e-6ad3-493d-84ab-ee1897a00dd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il primo libro di canzone, sinfonie, fantasie, capricci, brandi, correnti, gagliarde, alemane, volte: No. 20, Battaglia de Barabaso Yerno de Satanas
Falconieri: Fantaisies, danses, villanelle, arie
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 0xe60d15fc8560bd2cbfada15c0511e00c5f6120c2e5757fb3616dd7d26f4fc482. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR2X41714375.
Il primo libro di canzone, sinfonie, fantasie, capricci, brandi, correnti, gagliarde, alemane, volte: No. 25, Folias echa para mi señora doña…
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199f8275a6f3a385003d9c51b30ac2d69a097cf64821ee0d9d51b14647ebcebc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X41714376.
Il primo libro di canzone, sinfonie, fantasie, capricci, brandi, correnti, gagliarde, alemane, volte: No. 12, Fantasia echa para el muy reverendo Padre Falla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00367b3d290dc96778a48c56fdb7ef825462e1c72f76dee6ea636381715da6e1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X41714377.
Il primo libro di canzone, sinfonie, fantasie, capricci, brandi, correnti, gagliarde, alemane, volte: No. 47, Corriente dicha la Cuella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a267b35755a6dc05f73187a29e3d77f13ed2ab1c14313b3193b366acda2ed2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR2X41714380.
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