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 0xe3dfcaac6dafc0dbce939f572d0c4803d9a4b77b91c4f7aede7edcc97bca217a. 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/00f7f045-8eb5-43b2-8134-4fc1c72e714e.json and https://artists.proofprofile.net/proofs/artist/00f7f045-8eb5-43b2-8134-4fc1c72e714e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Yo Vivo A Mi Manera (Remasterizado 2023)
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 0xed7bdf01c101889d1307a55822e9dc72906a1b3fad5a9fb7bef7e97d9bff5146. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G2036232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1349442fa11c5e3c54aa701aa072caeb61d44ee5f91c78929db2fc0f4bd11e4. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES71G2036235.
50 Años de Flamenco 1940-1990, Vol. 3 (2ª Epoca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48deea6aa78c3a3788900d41e3631748d40033f8f49e8092972476b7966f1099. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/ES7580501453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a28221304253d3f425d5d0e1d33fdf21b60c702451d8491a4e512d77816b1d2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES7580501463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac695b9b4befc1c8b013f23e552a80940ab6bd8e05c6bc95ce4f4f64a9413e66. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES7580501456.
Historias del Cante Flamenco : El Turronero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d568b71b0620b6ecee089b26c2df78385741e88054045f3fe03025b2a992a4. 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/ES7581300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb11d69a21c0c298d8c920363c5aca9ee451f5ad6b0bb469050872b73376134. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES7581300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5b0e697f0168a38e8440a0c00044f79f97c4bcab277831b7e9a43dc6805168. 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/ES7580700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32a74c14daecb391c3ce490158fea726d9abacde3211387563a5afe11eb0c66. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES7581000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef2eda6225f8c4c19ab79a3ebe6dd22d5f132f6bdc803d14eb548b1688d9011. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ES5371601160.