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 0x2ec6cbf58caa4e58ff4437238a790906995afbbfb0b11a12ff3ef78e069346a2. 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/d3784894-62ec-4254-9467-05888c27f16b.json and https://artists.proofprofile.net/proofs/artist/d3784894-62ec-4254-9467-05888c27f16b.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 0xd6571f342922100d0af8aa5d29578d59cae4c0a2a8603c8acc09fcba600dfb51. 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/SE5IB2215393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15191c8e0b5891d7cc13ab64647795628d12f6b7acfb1d256377bc71210738. 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/SE5IB2124940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6929f147f7364e6866f71e5b97db9ffaf40c84899782cc0f5b8fbe11a63c2. 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/SE5IB2143480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846a449498e67545a47be926829e23283ff8ed854d0fd1a3297a361b0c119c7. 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/SE5IB1800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b457a2a8ee3fe941fc1350a9b2e5138afb50ebcfe95b8b2038f52a822690591. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5IB1800843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aef36daf63f803834f9e5b7a654d7416b594dcf825865dcd615501b12911c8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE5IB1800831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450bd0dce0181ca30d5591e278bfc1c73bad488d0ed82ce57f1f1838ff8a4512. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5IB1800842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406d1a4bb65bf2f46f60913b6389dfdc56f25a5c24a041b31a0c665dfab7cda. 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/SE5IB2125003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7408910c19ba07a6ad19d3fecc51d601718179bc2e9549536a7c94c55e0197. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE5IB1800832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785b16b5df86ef592a5aa9d2dda5faa323f37cf186bd37679d132397ad31c2a0. 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/SE5IB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785b16b5df86ef592a5aa9d2dda5faa323f37cf186bd37679d132397ad31c2a0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5IB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450bd0dce0181ca30d5591e278bfc1c73bad488d0ed82ce57f1f1838ff8a4512. 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/SE5IB1800842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7408910c19ba07a6ad19d3fecc51d601718179bc2e9549536a7c94c55e0197. 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/SE5IB1800832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed62348aad1528a6d94367a746cb6dda6ea41787c6cf171dc635651c672af2d. 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/SE5IB1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7408910c19ba07a6ad19d3fecc51d601718179bc2e9549536a7c94c55e0197. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB1800832.