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 0xe31fa69096064dfe8e31527caaad1ad3609569239605f4ba155ebab2fc573e5d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5727c32-f5ff-445e-8a5e-6767ebb36642.json and https://artists.proofprofile.net/proofs/artist/a5727c32-f5ff-445e-8a5e-6767ebb36642.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 0x9ae02800320b7c7e24c091f259e12f285e0b024c4c04ea9892c1cce6f18bb56d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX9P1454653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf036bddfa3fcfcbd9cfef8908394e0b3cd4ed458a9499fa98e68627bb70f00b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM81502714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894545978b0ca1545f434d2dbff53daa9b841839af3a72ba0bd19c2487b2a209. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/USHM81633183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747681c12b0f260c9de909f242c95ef1c20d6eca4eca8be123768f1fb48a087d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USCGH1704784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aac1fce9d66765723607c2fc43523670cad6df574260d0a0e865d70812af407. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH1704786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27515baf5e158b4c14a8b0fd58707a5bf5931d6e6a0281ea445021930c7704a6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:30Z), 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/USHM21851664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59fb5e8637d3ac3db6cd838e8ad165a975992789e6e845a5b4d0c8219655118. 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/USHM21851665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b3ea70e789e00724b5849a9157911435148cbd180d42b7aaa6d4f76ec255e2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USHM21851670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39af077cef7733f40288ef8c82a85822cbfbadc87b0cf44a9cd3d15f6f7ec0da. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USCGH2049006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f3030300472b6c2eff3a1bc3ed87a720828178193be7ab816cf7bb4973a30. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:04Z), 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/USL4Q2117217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c4566ad5345cbbdcab5af383f44a99fd4eed8e79ed0e38e431c93af7b6f86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USX9P2401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89c63d9ae5e52ac9fb0ee702c259e8d4eec2fccb4b08908fdda3067a5b1619. 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/USCGH1704788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d19c3f846fcf94203183137c62b43d0f27621fa27ba1a6923a19cb2363a4d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM21851663.
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 0x90fbf589c840255fbe8a94e3558504a0ff248b3907269c6fbb7cd7bc6bfb72f4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB8UU2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae79ce6d1b4c74c12289b8077b1b329955f7163302b117379bab3de16b2204. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8UU2000103.