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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58205293e92700f28882c3225633c627160028768c546e7d81edb5aab4b1e04c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25f58674-0a87-4dbd-9c54-1bba6f4dad48.json and https://artists.proofprofile.net/proofs/artist/25f58674-0a87-4dbd-9c54-1bba6f4dad48.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda458afc47ffea1621d6dd3e7c6e183d6cd31a6439d024166697cfabd051a825. 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/NLDG20800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd3e14ac81a333f0a376401fa6748ae659739ca0d1d1f9164e683bf26940a6. 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/NLDG20800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bfecd14495aff15ffe23bd56a90759fa9725bad87812bdd1271c5ed159d5d3. 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/NLDG20800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8aabcc04e085ffa0b6673864e171d2dfaf9ac7a1c1562a6b760952d433af3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLDG20800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b06644dfa6e0e15ae635c25091cfe84975dbaeabe46ff5ce8e9e2a26df05445. 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/NLDG20800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a97e75ffb9869ab4744435e48166489cf590ff8e503320586321ee9d133b2d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLDG20800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c4c8805ee6c64aa79e7b0aa7d3cbff5ab398d8d5cbad98f28a3ee2d3b7902b. 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/NLDG20800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac8977dd4b0e394f7357a9d6cb486705841e23ded0a3d9e0fad25d5ae45e01. 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/NLDG20800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65b9055d3ced2d4a9e6b7d80ac9d60b77ce30ec3ed801178bc7a6283a68b1e. 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/NLDG20800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7951a5c3203f082939a75fbbe39275f1eb1f71fc148cdc398677a8c965a24c5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLDG20800012.
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 0x0ea675b94886c5ac1bdb51bee1b9f66ac21e5ab35c8297567604f91a6048fa52. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLDG20800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168d7b0eab83d1b3af222b27811f508e13da0853c0427fe61c0370dd6910f7aa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLDG20800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f83c3589599911adcdf25be829243756773c15cc61322951bd1aac6b6fccea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLDG20800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dac66b06237261597e11b9a04f690d6b8040d00ccbc772603534c73438c40ca. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLDG20800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0894046d2b895c1153598b8e21a020f8ced1fc8b7b59809919ca134fbf44db0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLDG20800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d56c5c4c6d994615d7b75be77b62977f622552758a0e31ce5a1cc82492308b8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLDG20800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d190be13488227777b6e27e494d9da7668a4e9343dbd90f79480efc46d8ab. 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/TR0340800413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c90d4a26e4bac5aea303be74f33a70fc579ab09e0d2df9b4c7b1743eb21408. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLD321000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995fb2d2548d6ed4f406af5281eb99795688bf0c76b3e2add1758ed8057418b. 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/NLG661300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995fb2d2548d6ed4f406af5281eb99795688bf0c76b3e2add1758ed8057418b. 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/NLG661300314.