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 0xb5f3ca3513d1a7eb1397b6060e2f52c1ff542921a124cd8f5b00862415cc6f18. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89a87580-e369-4d82-8e72-648843b9212c.json and https://artists.proofprofile.net/proofs/artist/89a87580-e369-4d82-8e72-648843b9212c.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 0xb72670733d0c4ce4d9a2e2839cab313c72321be23be78582874c9fa428d36d1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRW889610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd51bb176c7ca7b5b9f499fb83222992395647cc36adcbf4789dd5d78db001f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRW889610003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2137dac689d23b3ea007a2c140f32f5d5148e2966e02c249dee99c18b10ab75. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:03:56Z), 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/FRW889610004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3914fbb13175cefac2a01cce8560a0cb994a23db7ceff12a071e82844df2c7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRW889610005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e58216306b2a5c4aaba2c672fa61b54180328acfc6f09896936208b4952308. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRW889610008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb527fcf30525e881072d356d6bf4005897ec9522bb692298e2c65774c909d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRW889610009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27baa0870fe61d9c0b0f062d6ced150e3b497c0c92909e9ac65d19030b35160. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:13Z), 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/FRW889610010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a849498a3eedfd49a727c91f5a38e9e91ffc0b09df617772f776ebeac3ffddd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:58:48Z), 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/FRW889610011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064509c763e66bd408de5b60bb46bca5726cbc860f8cad3e90b18288108b36d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRW889610012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421c37db4b1d468421b21dc2f8328a596511d562d8f22cff1878c668c72970f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRW889610013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6726b56fe17baa3fcae171a985579a3fbc928f4c593ff69e018c9a4e80afe0ec. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRW889610017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72670733d0c4ce4d9a2e2839cab313c72321be23be78582874c9fa428d36d1b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRW889610002.