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 0xa87e3045697b28390d27b482b17f87e89a8de1a9b9757492141f06838e599057. 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/862d588a-610a-4b03-b905-493895a4c382.json and https://artists.proofprofile.net/proofs/artist/862d588a-610a-4b03-b905-493895a4c382.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 0x5001979496018384ffbeaee39f9db0d838e97938be48ee6314d02e44b66f70e8. 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/NLT2H2400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9add86bbbdd55c0f865c81e58eadbcffbf4156880609be3769e65fa5d3a54b7. 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/GX8LE2470856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39094789d5424323b855b260abced4a7e2c7483dab8c95f119c40fb8974b5254. 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/GX89G2447733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868b461a24809ebb4c7e91e1f295ab15beeee5051d2f5d8394566b4d46ac83c8. 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/NLT2H2301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d920aa98f723236456db0031722b26c647968f9f23d75a603306856312df95. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:29:58Z), 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/CA5KR2404282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050489a57ac09d2be20c2a2bb05aa443cc3fcc4027be60c7d1fb429243d4fe7d. 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/GX5MY2358549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fe703f3321e88abe8092b75106e27e3c09e2dbe21be8fb28321216a7512976. 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/GXBDS2331714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f45ce5afcc90c57145fad0064cc581d08615ba236437a72dab2297e9ec35172. 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/CA5KR2336087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb6c4e52270fe86175938b0fad9392fb3ed1f3efeb2f7b8583d8dc2dac0510f. 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/GX5MX2348406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f71171f59bb3ed3c5b40911711fe08fee78e2725210b0ef50c35ab0525666e2. 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/GX8LE2385594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e3d96e85d7a4ec78807d6b0c77b19dcbbbff476debe07a566c5acdbbd2ba1. 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/GX8LE2338676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a84e374a6a3ead890085733b745341224ab1fc3109fc404321efd80e1bca2. 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/GX8LE2337831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9bd0b3daa4f0f7ea9a24ebad02a146cf3ec205ccd1efd302c1da1ebeed00ec. 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/GX5MY2238761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cb050c59dc15a4bb41ebd5920cdbaf9a0c1a7a6993f9cc1050a22dcacf83cc. 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/GBSMU0098680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092736b2c1c1f268853c1c874c562933c1acc86615ad49b4338aa7bf4f65e840. 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/DEE862102292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68d3d21a28444770fff724d15b126ac468de9d1e56064b77da179bf39fe677f. 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/GBSMU0017647.