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 0x090fe1f67f57097a130e1e5969e802948e03ffcf2a22c9556e0ab90554aa919b. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/887859f4-e82a-4325-a1d9-62036aec7571.json and https://artists.proofprofile.net/proofs/artist/887859f4-e82a-4325-a1d9-62036aec7571.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Es la Virgen del Rocío (Pasodoble version)
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 0x12a7ba15db6b6ba00ffe06be46e085e758ce837253219837e993fa6ab8332def. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ES21C1100780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9031f6cecf7165aeac3021e09bda602744e2f6bbcb9afa2a9a5e04486ee10f6c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:53Z), 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/ES21C1100885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55ebaa982eb341732383a47517601c1d4c3418ee19483ffc8fb97c3fc460e92. 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/ES21C1100891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358058304ce2a1b1f222c14ba213723b97978e60856a09e67c153d85d1ca4c2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES21C1100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce745247a36c014c2150309002d88c8b6c74bb91f7a4b77518ca32286c814bd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ES21C1100802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b08c692f1b42e07b904bbe5e35e395398bf1dae68c22703334c1a34805c0438. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES21C1301359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92ab25be85cc6e09f0955a2ac22a83207f433ebb146280d0bd34b3917fc2790. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES21C1301362.