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 0x97d91e479eec6012cd578a95ff4e1c3e65466631a14139a0aeab534f2442a9a4. 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/767412dd-b416-4429-ae64-0026451f64be.json and https://artists.proofprofile.net/proofs/artist/767412dd-b416-4429-ae64-0026451f64be.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 0x252d19b097c3bfee20e76892ec699721f43510eb202938335a033e4296a38ac2. 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/QZES72091092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24478fa7929032723bc3c0d33dc5924aa9b123847196dc1f66e6f2046a82a24. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWR2333625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c2b5e03ec4c86efb64037634a803f9bd629de9662ea0af22b7c20edf31b02. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZYHM2509702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc0842d26303fc5368c9d383eff8e53f1a9cb3e29fc7f06136d748aa4280ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES72321714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f34238b942be96d7eedfaf7ba30188b4c13b73872f20420a9c00b7c6bf26bb0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2382388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467428fe92c1012d62047c608b98a9147867e8c82400f57674525afb50327f1e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXWY82100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cad5295529179363b34962d8e0124249431ee0fa79c174afc99c1b3919a2ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC2GV2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08124a8456695953d165d7ac49d531a46b4b5976c0a434a9ec279d236661dc53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC2GV2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe95dc426184f6b82e2a5532b0e9bb6dc86461e44a7ce7ab51db7436ae318d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC2GV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd2a5069e1451a1ec9cd45585b962031b61486ed529483946ea9ada2d671f7. 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/BC2GV2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61892daddfd549a6b7458ccd7bb47151d1dca6f80b7cd473f24be88f5f36fce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRGRA2110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89292110fff16f3a32a17978ab7a1a5ea2de8c495af372b826290bdcd5ae40b. 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/SE5752102975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94073c13857a9c7c3de71d0b94232dbc1775e0a7ddff1ef205110353d620c597. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2324200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255714dbf9043404f6938ec1d1adafe765eee3b1eb7ec4ae771995ab4fa231c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCA5Z2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1fce7e2fad8a4b48405c14000c988787d3dfab433d725612b4631588df7a0f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDD2385370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b3daa285f6351a813ecade4326bc7a49d3721172d3b3ecb5cd4b5248429bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2092101.