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 0xf4ee99ea3440eef2cdec2e6e94eae8770018a442967994bb3dc77802a242b68b. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e9add4c-532c-4dba-8c5d-997910580c35.json and https://artists.proofprofile.net/proofs/artist/8e9add4c-532c-4dba-8c5d-997910580c35.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 0x14d800d0c9ead74fa479af047a43c03b2489e9d0acb37ce42b82fd0eab14c914. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEVI41601008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e93a058e451dfb595396c5aece2b2ce39ebfde20c33825ac4d22b4d1ce217a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEVI41601009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5bfb90d4493fb9a71e426cf8e9b8b2bfae0cfe5558e35e609cfeb28270d7fe. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEBD51600970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d91894043bdc8af9108fd04c96657bdb6b11dd0f1a1e1bbaa5575bcfb030e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEVI41902005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77876895660dd379d809a23d476f5ae3e01def779efc1abd380849d862e819. 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/DEVI41902009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f33d7ee9a61da12006089996a7705b4b17a49b87b6a2fd00fbe844d093c200. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DELJ81962563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fa9207743bacd43703aae27cea14e41b9671cd784a3ed0a8086a4639116378. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEVI42101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749705720546bb031c5f2570a58c1041773d7259a47a12ce5052e7b57c3dcee6. 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/DEVI42101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7759133d7774f82f72d579aaaffbd4954643f6076e3add312db3c69cbf6c8be. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEVI42401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736b07cd2c1e733df9286ae363d5baf49c275e6b959f0039de09758f292c8480. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DEVI42401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6817ba9a1f2917140bc59b4bf431352b536c50374b01ecfa5a49d07ff938652. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEVI42401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1ec0d758d0120bb9ad5af4ea9e064a9c9017e176d5ccfaf63c8b10e31c4a0b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEVI42401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024c6c1d26b5ec5112186a941d3d83478b9bf6ca97ded2d4cd21e44cca2a78f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEVI42402002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe60af55761a24ae7f39c9c4d197610380f2feb451ed9374d0db29f82117eea0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEVI42402006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf311cebde467fc6d40eca7e7108a7819be2e6f02bb302a4850c04969efe9e062. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEVI42402009.