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 0x13077587ab67db1a6757af61ec95e84e20a28270e3affa4a4a898677eec47924. 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/611f21ec-8e8e-45f1-bfdd-721129a7893c.json and https://artists.proofprofile.net/proofs/artist/611f21ec-8e8e-45f1-bfdd-721129a7893c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xf6a09bc4c83b8d5fe329cb45ee12a07befe4584620ef17a32772a7201ad961ae. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CZE561703904.
Boby Mix - Jazvečík Boby, Nervózna Família, Láska Má Párik Krídel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9422d8b0ff8d69bbea5fa42fc5be234ce31f93979b2d89ae319c4c0648922d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZE561703912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55710fb22293d1b2a1b117c984123e376a8becefb33dda581361b2bbb40a68. 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/CZE561703915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f78cee5da80da110fa01e3a2306d5439e01167afe9f80189923f072faffd67. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CZE561603203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc431d8a3ea3d92ffb0ad6122dcbf3c9bca06cd2e3352881ab8225744dbd3e0b8. 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/CZE561603201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748fd5e4fb270d750a93ffa7909c679bc8e941b48691fcae4a4e01b6c84153dc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CZE561603206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c1fb0f94af8d056c3eb7371abfa5063f32738edf798b115650a2653f77c3bb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZE561603212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421df00fcd56d78a25b8bdce1839deb988d90b343c02be1d6116e46e93e05c74. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZE561312904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a08ba8db776517bad6750b96c7d7c5dae9d50613960e0a890a459068f7b1ff. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CZE561603202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf2968c7c88843bf1b3b1581c870c79682119f0a27d436566de3a7f5bf7b84d. 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/CZE561406105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746964fc46bf564678efa3ff28caddd94ced249e58c5a1abc236af3159777c17. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CZE561308804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff112ff69dbfc9fbb7bbdfd1ad6e6077960061154a5d9533399a8eb1ff0b37d5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CH6542022285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9789c582a720ed043ddb0b3a7204844d8821fbb3e8c5d4f00e3ec8dd1c59b1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CH6542022279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb561fb4d1c996c0e1744433192107b8072125f3c6ac1682f1013779f480c362c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CH6542022272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefc117f151c0f9a2025301f794c6cb0e9b3b63b89952cfa3f246df6c2ccbcc7. 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/CH6542022269.