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 0xf2a60039eb24825c56da97cd654a7c1fcff4e8baea06e01f2391dae7b4646c0e. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1836dcf-dbe4-4491-85aa-744d4aa5acf9.json and https://artists.proofprofile.net/proofs/artist/b1836dcf-dbe4-4491-85aa-744d4aa5acf9.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 0x5397d75954c74bce97287f82f128db40a63bfd37774807f2894e3a39cb03cf34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ651109860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd093a7bb164089e9e3e5cad608b8c3901fb0be4727ec475cdb26d23214a7e9dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ651109861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988f0bfbe1ab7d8ec11d4b06ff69e5d56f0d2144c1a0c59f66688a602df954d6. 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/DEZ651109862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b2393e4950d79a3002420310951c57776f975956a8fc722147f57efdc958e. 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/DEZ651109863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8833b444c7a03d7153d33a22e5a2f5018e0c5c491cbb75e740e1f5b3fd30dfe. 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/DEZ651109864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924d9f1790d20791c133615e150a795d2d793646c3c7307bcf558b36c295cbac. 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/DEZ651109865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba0cd27da2d40e33a2d8affe25990e39a7cf80c58d3e3c872b53e4c0f0f0c4. 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/DEZ651109850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1b2250b4d2a210e47fc4abb898a6a3dcbd5508ce209505c5c22ec8b0355249. 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/DEZ651109851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb5411caf44abb3ec3d26bbc6234a4986cfc424a3dfe61f2235d14eb2e812f0. 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/DEZ651109852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779233ff5320f2e3e6f8a1ff612a8db0daa8fe4e7935de8ed5481bd64f2ad8c. 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/DEZ651109853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ead3d189257fc5a188c79913d564399bbef2c8b9adad8bd3df660897e602621. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZ651109854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e468e13628c3ec4ccd5e1d92fa1693aea4ebaf5c3ca1fb7fe17bc78c5fbbfe5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEZ651109855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe350841a1a147e65a9c2d546fb58e7311ad20c721fdd31e582b230178d152b39. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEZ651109856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44924fae57e48160c27ee18bf8a14ed6373a5e2f3911e662a9da120e9ad4f5bc. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEZ651109857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbfe89ed309393c656c0b256fae1f25014bbe84a2b8e4af24fb35a10898dd12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ651109859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec792f34dab1360d34457c69f3875f6b4e14f545d5ae9f131390515b7f87b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ651109858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf34cd518a748b9a42915004d423d68db0173aad279039f8ef9fd079718905e7. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DERK91010501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de0c6a50162fe5b7347e203d38450fc4e2238b657d8be047f3c03e8ea967d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERK90910501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfed1707cb8c78834c06f9d3a20ac1e8534f053437514a5e8f8d142996289a2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DERK90910502.