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 0x843627cd4669dda5112392bb1b552921527c50da660e1fb6ed3e024c5add3314. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0015907-5f85-4583-9388-1c0186574ec9.json and https://artists.proofprofile.net/proofs/artist/b0015907-5f85-4583-9388-1c0186574ec9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rabeca Hermética (A Chegada de Safi Al-Din no Sertão)
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 0x362f05bb10a9c9c0e30e7ea203672d72ceca0e69f0ed6068b288ddee671e00e5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNJV2336609.
Bendito São Jorge da Capadócia - Αη-Γιώργης Καβαλάρης
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3f31b53f6040ec799b8d33f8a87c0431f6a07ea2a83935ab6c91bba32d9c6. 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/QZW9K2380192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc953876b9e5f43e9dbefe7a95725e06508bebc5d7e7b6f942fe1264900fb79. 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/QZNJY2335208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0e885499cb62cd9be1a380d0c3d328e4e0a776da1de8546b6895e596c72b04. 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/QZTVM2323841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d591e39440196c43c0aea7a61bc06a4887b21aa2abfbf59a29705145ea176b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNJX2319979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef83c4297021279f050d35cc0a96c6ce977de690bcb2a5307c390d3ccdf955e. 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/QZW9K2380193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484adad611557dabc96c48937bf4a674dc9a7decad9c24eb6780e5731e98acd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZW9K2380194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab0bb45298ffe05f2cc9b4bfdbc0e096dc9c920a9cb9f2bec808705342f8d4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZW9K2380195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf443fc3839182f5c6b7a1101f9c9132623d9aa42802ddcdcc6bb2eff469874. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9K2380196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15db94c7d942ccddef0d7753b1332afd2c1cbe3e0f8630f9ec6b5b23ae0e09. 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/QZW9K2380197.