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 0x940b61c4ed4dbc0bddd2588cc1d946b23e386dcc8f86d030f5c232e5863f80a1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bff230cd-7d7d-4d91-8c4d-a7c83303d50a.json and https://artists.proofprofile.net/proofs/artist/bff230cd-7d7d-4d91-8c4d-a7c83303d50a.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 0xb0f50a806777ff1fe64cafb8f39ee07dfd9feccac833e8d09fb0eb7680d90223. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82035456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5c6bf9c0a7a009e4fe60d24bad3ebf7b96db594497f68ad13dc94a9a9555d7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6J2116360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669ecc949c6f2bc48cf2c0fdeb46346166ce833556495b275c7078623d7e5d00. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEAL32300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6b8a27de1675dd844173d3d1925124a4a6fc57a380e916116c244cfbee34fa. 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/DEZC62214772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd576df9b8cd2eaf6f39166d0d0d7a4f254fe3df8c99dee10241f7f72459dda9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62322800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c621f11e95d8b09f0ada0a46626ce25247f066590225242c61b6227cfac22c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZC62334180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35f792c647ceb3685a8df1b73205a35bd17e1bf947049a9683bd63a568c77fc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEAL32300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60dd1ac2ce8ff52220e5f6b590b19cc0e2345c366e6306ddeaf66d3d25a04c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEAL32300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc4715daeacc2d6c65eb29e7e2e019b0fe7876c509e5d3745a0f0ee97b17410. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEAL32300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47685b9dfaf86b4dea22a7a40b5f9e04dbbfb7e1ad8405badcac6515928f052b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEAL32300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3057706344a16b1c3c5fb28ec9a5301f6ecfc29e1bd33cc145dfe3763cfa33. 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/DEAL32300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6390df5a3fbb90a3e5b9b0a613a0040ccd1c1597abd166e610f7359906f0be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEAL32300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a38717759f813d259e5fa58bea392ab626e1c4ecc160e7c7fc52b41163c051c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEAL32300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ea6b738295ef1a83d8f6252874b72adfb61296362e9f26530b9dd04b88e36. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEAL32300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb49d7d8e9a3050a2001dd87a23c116d7697072ab49b110bcb82a72cf33b5f2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEAL32300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1eea100f549a671d7c910657f36a8160a4560f27a754198f3bb8459c6057c7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEAL32300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb49d7d8e9a3050a2001dd87a23c116d7697072ab49b110bcb82a72cf33b5f2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEAL32300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b189ecda017dff43dc7e7889fd41eb6f27e6b05024f833cde22964f3f14c7bb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEAL32300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1eea100f549a671d7c910657f36a8160a4560f27a754198f3bb8459c6057c7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEAL32300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ea6b738295ef1a83d8f6252874b72adfb61296362e9f26530b9dd04b88e36. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEAL32300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb49d7d8e9a3050a2001dd87a23c116d7697072ab49b110bcb82a72cf33b5f2. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEAL32300420.