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 0xd2cfc281647ccda57ca7219df06d04b3f9681992ee30a5415a1998b0ee87bda7. 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/f4e62c79-afac-4e1b-a45b-5ae37cb7421c.json and https://artists.proofprofile.net/proofs/artist/f4e62c79-afac-4e1b-a45b-5ae37cb7421c.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 0x0abf8880531859b4dbeadd1e2533f0a310cb77b0fed5850b7d33ddc2df7b55a3. 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/DEZB52020036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d01ec65783c66c798d388b21ccb8a2230c6d511eafd369bc6162fd5790521f3. 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/DEZB52020037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2ffd69b0caf59f6eb15a45e9a63680fa26e8f453da1905c0f95569fca857c. 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/DEZB52020038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd307cad9dc4507157b11d7e343daffde78c360ed02ab1f801bf338a562119. 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/DEZB52020039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28249cd8975e8a994f5af87ad2b939fdf2bbad97344afc7dc5f29d6698e6917b. 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/DEZB52020040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48eface183a703542406cab67efccb84f392f03e8ee69a6f1f752190eaa863d. 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/DEZB52020136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24d163bd2e0868ab68e8d22dbda413b9a01f125b1b22d17b9913bbdf7288de1. 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/DEZB52020137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b86daa58c1dfb2ee580ec516f2342f5e21064b6ef7a304d922e4c82eaafc0c1. 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/DEZB52020138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53c4a7566600d88a3c6dd144d3a765c95dd6c80396b948134a9208e71804ed. 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/DEZB52020139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad47ac73e7b517b45d76b3e77c30bd01e32d60e3d53ed24ed7ae7331dee25f16. 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/DEZB52020140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14c4ac3ce28e50fc2c5d9c3b54c407b6c399fb32c778e63e6d25925b53ee35a. 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/DEZB52410556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2e5ff7a08deef6347dec3777b6527b0dd7b75a2a0c2ced19478c79162089b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZB52410557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983886288c5db179dcf60ebf77f8260cf42b67e471b7ba371c1cb547f52df2dd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEZB52410558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c25c179fbb2c29d841d992e893499344a38c451d115e1f9398c1fb04a946862. 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/DEZB52410559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835ec631057d677b17b4d34707ca8439c480d5f0cfb8c95a2f6242810e62d8ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZB52410560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0caa5f3c5603914e19050ade6885c672fd1131a90de65379a3a067b88b4361. 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/DEZB52410563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b949f51df4a93d38ba9e5bd5f16c7836cd36b1901f563d89a5f41196cd594f. 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/DEZB52410564.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8006d95cb420a6b138dabfe5813bc0c5a5b3a9697f76a888719b5e511dd8869f. 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/DEZB52020111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995682b726e75e4284c722d3462fe7e1e5ba5270ca3645acc1854b20a7e61e7. 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/DEZB52020112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a658fad3849337bb70d2ec6762a0c95ac2cd6309ca80f1f55e6b8b7c9016b9. 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/DEZB52020113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b60879396233736c52f4207e4b64762e0b40765e8b15c8672cb78451b97e7. 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/DEZB52020114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4f7a716fe70fd28c1bb746934e8739afc2b92949e57e06e483c635755719df. 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/DEZB52020115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85609e131a6e92272b3dcfffaa944c9c14d4d7de98e06733e1cc75395347e69. 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/DEZB52020011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73012925d778f6fa1111bedae82fe6a59bd96a181cea081293dd075cb3ba79. 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/DEZB52020012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe8e0b502b178e85e00a8e7fd20d2f2eba1e4a77573815f8123291560e361c. 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/DEZB52020013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d4c792c3d5aae80d6be2236ea9898ba45c20d86cc521ed217381bb0038fcd. 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/DEZB52020014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f634fc83eca4bdeac3bb6c48a6cc87fc54dabd6ddbdef9e06eac723391220. 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/DEZB52020015.