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 0x63fc58e46bc1762d7f2b19896c4addacf5bd1812c49815d8ae5a31cc4c9a7832. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5484b068-ce98-4792-b777-f3273b0f41ce.json and https://artists.proofprofile.net/proofs/artist/5484b068-ce98-4792-b777-f3273b0f41ce.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 0x855fb976cc23855cbb29c2ddfe43adf175be1bb639853f78f513e3d7c25bc64a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES8000511601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b4df462197da090e4167d57a1eb3aad37cd064c3af55639e5939b549ff96e0. 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/ES8000511602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc51ca4e6f19d5fc0c06876f610d201ab5487eea697b45391f866ad66aa50417. 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/ES8000511603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92032a8ad78c296ac08700b1573860f94ebaa979ce67fc21de64eb1b864ce821. 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/ES8000511604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d265ce3b96489c8913a2974ffa2887135b35589c0db5bd817a23e076d043e6. 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/ES8000511605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43276c33619e5f1d213db81edddd59d6a57372ed2c46beea1918b23cce7688. 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/ES8000511606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b7d59927d0850726a18c75a9a75fa3b7462824e79ecfd6bbb01583a8bb4cdd. 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/ES8000511607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14da0110d2a44cc3cc3a3dc773a3c7ca5c7d9bd073096f5ce96ae4929fa9470. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES8000511608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bed7b90372bd17778b2b3ac785dde38dd1662146ec1290dbada3d70487db63. 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/ES8000511609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689759c11abdf33b8a33b7d90fc1d4566040b1e878384eebf923cf2ebef809fb. 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/ES8000511610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb322a17cf7dbec94de9dbe54d6a97a4d79fec06966bda838177c4b94499b02d6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES8000511611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4168ab1f09bc62d4ce8ac596941325bc4ae66128adcb649e455205af3ff66e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES8000511612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d4481caf37b2e2d4758c38b3195303890c370e93f3a32332f2dcb9b30afd68. 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/ES8000511613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314138c8724e94626ebbd467970c1b31f96b43afd9cf5879261aa0a11aefb3d4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES8000511614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac180c9cd8bfd2cfb4f150dda68901866a704caa971d39feea0befa1be8b8b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES6110261302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda652ec30177402a8b04d183c437b0f530cfb140ca237e44172f6932fc0811. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ES6110159502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd110081b46524834c1ef862d66447149d954e893fa849d81b91498e115d47ef. 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/ES6119856301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9b35e95ee16ae0fbdfd0c0d52ef37de55c21ed9ef7f999dc13e3b9bba2c42. 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/ES6110260703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6735009d2384ea72b955c8e6b9f0805ff6e007b7fae609e41c29125915833c53. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6110159901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b693d1ef280e75454e7d3c03fbdf6f9c02989aed9fcbcb891436cf7a039115c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ES6119856201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd2efce7ed8311de358cb0709822a2bea2f57abea41937a9e32cd0ea0ea670. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES6110159522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7d4b63523396c5c01a79e3fcb70898b81fd95578d1bacbafc44a0cfb17f1f4. 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/ES6119856305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ccaccc01e85b8d6245a9db42c5bbc8f50f67dbb89ec6399e471cd5f47d45af. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES6111068205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2ef3d34b003a720d98099aad1cf745204627e1a55ddd602a79d5b557dbf01c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES6119755412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3acd084f6b1fa2da9781b71c4be8663f2bf028359d086ff0dc6fd32bee3055. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES6110159521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e40ca691a6586092e6c59dc9530d287f6ec10ba9699a87a7665e27cd41b5a5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES6110159523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63f48081405a4ccf377a46683d5e290180453cf99f64634edf75b04f0371c0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES6110261002.