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 0x73272c54ce161c68a3578fa940ddffe0b0fee008fd00fa376704b73678f01330. 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/9be641a3-c607-491e-a1a1-dd9786c2fc74.json and https://artists.proofprofile.net/proofs/artist/9be641a3-c607-491e-a1a1-dd9786c2fc74.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 0xf738000c4caca74689ccdeb04922b9c09e61ba278fd9ac41586a1a24a99b76a5. 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/QM6DC1883060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ee6ab07b510cdd780445ee6590f0919b41342fb0cfc645e6dac8c3c68746af. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM6DC1883066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff14de9428ee02c5cc0bb41b392a9fdc5aa82b694805fb25acd90cd2c66bf858. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6DC1888661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16af8c59af349b74a409215bfc83946507fe3c1396d8bdd2ccb04c82ec95fcfa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM6DC1969445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e121ac1b58742230fb6306d5f71c366bfba899bab52cc61d6d4665353a33276. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:01Z), 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/QM6DC1969448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fef4b5ec3c1c1f5f64551da13367f6a8a76e26edc6f8572f48d034b59a4c7a0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:08Z), 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/QM6DC1969449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d791227adeac71518c069b6f0d82a17fb5492de0b42da3bcb36a287b0e29b. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QM6DC1969451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e813d6f4aeed602498031ce62365961fd9b795420b2d09cd5f48bb9d3445b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6DC1969452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178f476bd5a611fb07cf1c1a1095741877adea59ca9b4e921b7c083e12012cf1. 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/QM6DC1969453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa181f82f876461ca4ae3e11d64bbcce1a03a9cbb35864a74b8810260edaea34c. 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/QM6DC2073261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e896f8dcc6b97848bac926945968d3fb481f0893ab0df7f58f89c6d98e6bb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6DC2073881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd989fcbff780c49a9e370b301510a6fd8fabf005632efdea6e40e932c4066. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QM6DC2097281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ac1c3e540e2bfa31f57cb225a156eed2682d378b7e1a29ed90068349878c6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNFJ2119141.