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 0xdfa7af149c1d977dcf2144cefdfec969c074d267efba8155f5756cee6166e9d4. 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/d677eeae-9bf8-4496-b6cb-3af51397dcbd.json and https://artists.proofprofile.net/proofs/artist/d677eeae-9bf8-4496-b6cb-3af51397dcbd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ba63c5fd44ccc084bb77ea12307a76fe85f34a37a98e60152921832c498f64. 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/SEYOK1417519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e679c9fae68996448f6ca5c7db781bf90756340fd9e25df66cd9a1fc43c61a. 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/SEYOK1417523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6273de194137346490cdc28d250758eb35119015f3a64912ac6761ef6fe7a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEYOK1417524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7229aca92cc7680a568d0b9bf54a4a8589a4515652d08562c41cbd6f30dd56f0. 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/SEYOK1417526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8de0522376001da1ca1f98965ec6a03801e683316339a6970129a1b8a0fb4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMEU31817979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c7e2e745d0ff4ed008c92eb14d3bc62c14ca19951a40aa832e6ff4b0f0ed2b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMEU31817982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa00691d3026b433ced0473ba76b71fd656c505cac19e3f4e27a7c376c795c69. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMEU31817983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7e0a96fadf40e870e1bcf92c4f8eb8cddf9649acc8ba5cd37a3709340470b4. 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/QMEU31817986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6db1906a03b3e35189bb0a830ce50dc95b821cd20cf1575abd2e4b1da56ea6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SEYOK2414632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a77e2f7a1ca47971308ffbfcee0001960058d61fe4583fcc5e7d32045828dd8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SEYOK2414633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af1d466b9ddba0992bd04bfae3e6e0b436f732eba36993f4e8b5f0b06206fde. 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/SEYOK2414629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8078e927521bc7e0ee2cfc575a9bc1149d9545759ad0fe1e12240bb97f5eeb63. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:40:20Z), 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/SEYOK2414631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64a246e68ff9a10d3723a573c742f83cce9929c1d4255de6cd4e730bbe7a83e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:07Z), 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/SEYOK2414628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe676dd7e0c1db321f3334b9c407c87a5a9124005026427163fd0eac7c02d3d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:46:37Z), 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/SEYOK2414635.