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 0x92c641980b0336e3ab113e258d63c7bd07712656eac1b77235716ffd1f90911f. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0090a554-b72e-4177-946a-2c627ec2fb6b.json and https://artists.proofprofile.net/proofs/artist/0090a554-b72e-4177-946a-2c627ec2fb6b.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 0x8cc03b4598a48b6cebab677e695e435de59bb77bf2d0b722ba7917ff531ac375. 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/JPG102100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235d64a2a1d118faa9586f8c684f63f59213ffef0977c2b46b7cdd4393f6f1df. 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/JPPO02402916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35465113df5b8bdb302c7d5c7d06df4d14f5222cf50a6de025af628b910a404a. 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/JPPO02402917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe4c1a4a019a8874e36559ffa53110980f75d06dee6a2f6983755e94eb644e. 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/JPPO02402918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f074f043ab8e8701c04f041e55a99f853da77ccf2bf6e3044b4002659f9891f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPPO02402919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d295d126ebb855aea6ab56f298bf553158bfc43c9659807301f2056a2a8c607. 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/JPPO02402920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47017f7583b652f64a07dc9ef0dfa5bfae0a6a80e3b6f3ef72013f5157fc1ccb. 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/JPPO02402921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e76ebff25c50147accb5ca651c4db891078636cabb1ca5e33960fb03ae29563. 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/JPPO02402922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6c5be13436dbbf32f3df27556007e102be17c78412cac49a1f37be4bc7341. 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/JPPO02402923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8dce5fdfcd05bc8dc30a3e485ac59fddcb3c973d7bd8eb17a3679202de3d17. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPPO02402925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481093dda0c867ddd2db57ddc46c49431954b22450b337e29e66ec5813d57ea. 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/JPPO02402927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70537f4be4c7103e754ea9e6947e8afa1a49fa12938ac2331aa9fc0066b219. 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/JPPO02402928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53364edaebed400817b33b555fd9312e3bcfa23ff7b82c22ac4ce7c35ac40278. 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/JPPO02402907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cadc753061575a467d7c2f9112f1bbd41197c5689aaa36aab49f4d283302325. 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/JPPO02402908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3f9b62d264115e6f80ab8ba80dc9fd90baa6322325c10c012e26beffc17bb9. 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/JPPO02402909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f4ef6f582867c4f987b576229d20a8841ed75e4ea6d4f9bc70ea267c981171. 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/JPPO02402910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94285057d3ba04b98cc99a7b580e0ca1a9dc79831d0cd0303ae811b85c590c7e. 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/JPPO02402912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500e8af9ba2500e0b98675bf0d894c762f86f59eea91af46648eb2299e9e459. 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/JPPO02402913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f45bf0f4a112f4ec2d79c918235794aca34fb06e9014d2867496689a317744f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:42Z), 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/JPPO02402914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2329143ec5584d74285ebe812be6d9a75cf14de8c04b28efc86b45f72f9465. 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/JPPO02402915.