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 0x3ff52059bec95c312c354fa92ffa2037f80ba0a2831d54bb7bf42be330d7b6c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bb95f1e-af9a-4858-9e9f-da2212eb68fc.json and https://artists.proofprofile.net/proofs/artist/6bb95f1e-af9a-4858-9e9f-da2212eb68fc.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 0x23a58f2f0f76ea4377d2f606f4164337d47069e8a002a80fdf262a653b189825. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42266735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c279002984f13ee694fed0674e069fc5bb4aa76a74c01f2dc97ff8b8d010b6a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA52226161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1247d540993c74ea65870e8fae66ba53a7cc9641ddc47ed737e19924ec351ee4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2230745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1247d540993c74ea65870e8fae66ba53a7cc9641ddc47ed737e19924ec351ee4. 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/QZNWS2230745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d23e232963ddd92af4bddc1c54a2dc493752592af23441d4d83a226de4ebc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAW2356757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420739eff09fe7e48dbe0b5be093e21885ddd7ea0e724d5461f32ff4dc3d9594. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB22306550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb053a78a7f4b37d4509c5afcfb06d94d5f7df2ded93611de97b9498288715. 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/QZDA72428528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54593472601593d4c9fbde82bcd21bc10eeeb67c8e1e7514eb5482187079940b. 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/QZHNC2459516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54593472601593d4c9fbde82bcd21bc10eeeb67c8e1e7514eb5482187079940b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNC2459516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8e427815e47e5ea696c005de8079f7ef5c120f333697a8e2800bea4ba4e887. 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/QZTAZ2464775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c619a6c567db1fda98e6a6dd82beffa9ad3cea6bf311e4f61b99df882a2ea87. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBA2473205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd4221cceddeb2cc2ae31ed3bdb8ea5751108ea3e60bc7c72075109403cd261. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:35:57Z), 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/QZRP42504753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd4221cceddeb2cc2ae31ed3bdb8ea5751108ea3e60bc7c72075109403cd261. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZRP42504753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97643fccec39f45062e6c87e86eb738c1dcae2fde423ec93008a54bd98867606. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ARF062301468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de7d7d30d8a83b0c0c3266fc01523de0422c07fc80c9474c0a52144dd0b2090. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22265641.