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 0xfe0bfd17145fccd7330774b2b4280b9db036ba5929723f6b9db3229c5b27aadb. 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/6e9d2ce5-33e6-4b72-8e50-d9d4ac6aa0ea.json and https://artists.proofprofile.net/proofs/artist/6e9d2ce5-33e6-4b72-8e50-d9d4ac6aa0ea.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 0xb7dba7fd658e4127313c3de38daa3f818d593d63c0ccb64a8c9128908bf6195a. 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/NLG092023601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfbd9976431aa5074c6c202eba03e0ce6a8125c31004f739f4f6bd297ea6d48. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NLG092023602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a5f9279da4a1d3ae9ec88636a83dc448b2b351b4794be0811a1c2380656ad. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/NLG092023606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83168a1e3c9e94724fbfcb2e9e10a89d83369ceb25d87fad9e98807d2e126ab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:34Z), 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/NLH142412207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0029db2fe3d3c59fcfdec1124c0c47750087dc9924af2b822e20065b4d992d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:11Z), 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/NLH142412209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf244253ea2ae9d468ea0068e9d7fd50f0fd4b438615e7c95f0ceae532920792. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLH142412201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c329e79fdf09539367b187d55ba28cb39fd85be6d02614fc37f4039802a50. 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/NLH142412206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83168a1e3c9e94724fbfcb2e9e10a89d83369ceb25d87fad9e98807d2e126ab. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLH142412207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0029db2fe3d3c59fcfdec1124c0c47750087dc9924af2b822e20065b4d992d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/NLH142412209.