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 0xc8162ea82907fd07f9e880c23976866843c563549a8cb15aeed2f175130af8d5. 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/5427de32-d8c6-4476-94e8-6b1f0ba5f6e0.json and https://artists.proofprofile.net/proofs/artist/5427de32-d8c6-4476-94e8-6b1f0ba5f6e0.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 0xf2597b9c401914694f7cc4a2b1bef049ed31e696c4a56aca4e3463559dc7d40e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE4SU1701028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9935622934c7706fa1085d262aec16f3b8367c435d7ea5ac607c4780f4a26. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMBR1511036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35b8771c58d2a0827d17b0a007a5aa17e9761c176dc908e72e3f23947f51618. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:31Z), 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/USMBR1712657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f38279efd4f1c8d8abb3399d548ce97ce11449377468e3f496151276ddbf51. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USMBR1712659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaf0bfb6cda2bbbe63125545b2dd65bcaef209f568541062fe9c31bad3800ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USMBR1712663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f5723c94a9e69ba49927b3a73b53a202f09c7a1a0fad501d30d5c0153ce85. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USMBR2014280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c8dd4a20eea9c20ef4a64e53d56f8779cbfabc230c7bd2d7e9b1c47abd465. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMBR2014281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e12f91c70c972d7a1445832781dcf91cbe7ff44e6fb93307ed5415e2b04dc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USMBR2014282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa061ea90eeeb8bd0401d2a9cd0620360330919bc6653a32c0a13d04b2a141264. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USMBR2215141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de69c988fc4db371dfdfab5b5bc9643ca0af8828d283006a95f1549f2582cf7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USMBR2315908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1c531079805a02e29c34443655122df5d54617d130228c102d3877d8d05106. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USMBR2315909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e66d86cc430b7672e9f1d236821f159e3e5683f56a42b51fcebece8220b92c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USMBR2315910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dc58378c5fa4911caab8b2ed638582b1c5d2f30f6a24286e75dcb135d2ccde. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USMBR2315911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0f6e4d847db164ed6d09bd8a24b06b0adc9ea2f4d6321cf69ea4559c874c1b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMBR2315912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06977a65eaed7f02d3c216461b019bc70c6bb2ced8944caa89d00c5be333c2a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USMBR2315914.