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 0x9a21562941d2518843d93b399d2aaf55eea518c7712bb665ee74d4b2b3038455. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf78f487-7d18-41f7-bd8b-443e83a90ae4.json and https://artists.proofprofile.net/proofs/artist/cf78f487-7d18-41f7-bd8b-443e83a90ae4.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 0x03245ae50d29c166e221a93c857dc9830448030b63f21581973a9b919191d7df. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX3Q92541398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d436c025ad4c85d535cd59c52890b8e6d2bc82ef1125208f36f2932573ed21. 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/GX3Q92541403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab155946c4bb7b22474b67eb650ac752eef1ad748c465bb2966e3b7419504560. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:42:27Z), 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/GX3Q92541404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6b35605acc7963b4a5f7c99fb5218fd1ac62644ebd99cdaf5bcd0d5299e4dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:30:22Z), 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/GBLFP2575586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8344c0834d8b214768fdb66550234debeabc07dd706136e2a0c3c66c0d3a47ab. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBMA22535903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758ffbbe5ab4f3de9c4084222b43ee28d388fca4f5eecdb620f7d8dd1b42d318. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:44Z), 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/GX53U2590360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343fc140157f91e432320d8378d41a30508b473c7fe301c19e68fed9e83c42e6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2580927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6113d76c16575b064f7e36df8c3d45edca3a6e117a8288bccf1cf09991f144be. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:27Z), 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/GXH2J2580937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8eb5075d9cc0671da40baf26a4ff8061206f83e722beb14a50b6dc3dffb7cf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GXH2J2580942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca36439e51ae479bea410d54d44df6dc6f66f08debc0a94ff23756e6548a5b27. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHAF2527012.