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 0x9070b4543c6978403b6a8db021356367a9a0ca45787ea276664ebe8704b582a5. 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/63113c37-d7db-4169-912d-46d2f8e3fd0b.json and https://artists.proofprofile.net/proofs/artist/63113c37-d7db-4169-912d-46d2f8e3fd0b.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 0xab1cd1e1754c87c7334cb13267f1681b3236059ce3252401189d8827155eb8dd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAHS2330052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1cd1e1754c87c7334cb13267f1681b3236059ce3252401189d8827155eb8dd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHS2330052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e9857bc02368cc1dcb67f79b9d7d38a13a1204bc93cc6b33ba1977fefdb6c6. 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/TCAHZ2466951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca66107aa355fb6bfb992db1bfb2170460e9a9adffc1db297763a6d3291a4c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIF2449863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb6c42b1fd94b4727a3b6e5ee7e76721b629fb17c29a143423a2ff33e8c5a6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAIJ2418340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b0fc5d0e6dd3ca23c8f8a36873842a10c5a8b1fe7634ecaddb9ed37c6192e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJA2469175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1ed93bf1aa697e25400bd2456692da58516b9b4d6d56bcac45da7eb65186f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAJC2443630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71370414246659a310fc11687246dc6b840989e50e806e799e891ac41cde7ca. 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/TCAJE2555403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71370414246659a310fc11687246dc6b840989e50e806e799e891ac41cde7ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJE2555403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecd8b17a3e8356186ac752f645b9552b40479729559164291de4fcf5d5486a9. 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/TCAJG2500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecd8b17a3e8356186ac752f645b9552b40479729559164291de4fcf5d5486a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJG2500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa34f693a90a038751a2c0412f2ee0e43c5236a20c60fa891a9410e2d87216b8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAJI2512505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa34f693a90a038751a2c0412f2ee0e43c5236a20c60fa891a9410e2d87216b8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJI2512505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8cbc49a72427f63f31f6feefac55224dcdd283f7ec31c5eddfed30a0e0e457. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJK2517612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5310467f5363b4ff07a6634b505efa957676ab73601e593caf03f29d77977d. 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/AUGBT2327971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eabeaa325804cdd330dc65f1040f23abb581a2cb3fbe7b95e81581cc1a14e57. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/AUGBT2316388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa2d37c7385f92cd52c638231416e316d067f1901941938ffd718b7534795b8. 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/AUGBT2303893.