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 0x554e94ccbec59cfd2550c567df3180d1138f29c94d1f03ffdbf9f2ebe6161c04. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d88c419-778a-4e71-b40c-e3f9ff8a56e0.json and https://artists.proofprofile.net/proofs/artist/4d88c419-778a-4e71-b40c-e3f9ff8a56e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Super Poti Poti - De Les Millors Cançons Populars Catalanes
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 0x77013417c2d6ece320f31a77a22359ab26e7f9cbf323f42d360d55b79b9880a9. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ES5300715003.
Un Recull de Les Cançons Més Populars Catalanes
Un Recull de Les Cançons Més Populars Catalanes 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776754f53491cde83165baf90cbf4963f33ee9f20b0d0bcb8d524848ad478a7. 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/ES5309801460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e1ee4f879bf1bdcf90f6ecf42cc21e6de730130e2890fcb1aa133928e92548. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES5309801461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66eaaaef2d78aa4fae17091a25d1644b076e13409d9bcffd7b809b33db46fac. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ES5309801465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865b5c1425d32c50045b60c5596ac7328a3b312dc07a741285ed2db0b42a0aa9. 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/ES5300715381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbada9ffd1bc76d979bcd96026325e64549ff7817491f5ed82a1f1a65b4b66123. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ES5300715382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c419ec131c877464f1038417445e2f86f53a2fa15062ef148e5dc09e924ff08. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ES5300715385.