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 0x1891ff38418b8d446e8e7793e24b3de49406e59137630c2a4899de856603b71e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5400f38-654b-400d-8750-d2518513e3dd.json and https://artists.proofprofile.net/proofs/artist/e5400f38-654b-400d-8750-d2518513e3dd.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 0xb2e78b1ed8e2c769be7326984ecc3fa9ceca51a311cb94261df95be5bde80f71. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:54:45Z), 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/TCAKA2508074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31903efa955c92cf2023fb5d74d7787ac2985fc0db2a96d73dac86050ddbedc. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:43:27Z), 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/TCAKB2523462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd957e2d0d711e84edf60e9c8259acb3f0c8ecac80cd36816cab10e62c53b87e8. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:47Z), 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/TCAKA2523225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d90531c8e12d93256cee5bc3bb0bf70ea090ffa34882246b2b7a861ec098da. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAKA2523288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f79d231b8b822b14ac608081bfda58b76ff66e3c360072034af08226bbef398. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAKA2523130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762b19fff0285183cdc0c8f20df820eb9e14e8d859a4f03f4a3a09ec8bb38d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAKB2523826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c948158b1254eaebb0836df8f0c5f7580964215dccfa2c91f6c116189e3af92. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAKA2523640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2cc6a1465265a35ca8fc99c0e37392599114a591240e5b196ec84186db9b1b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:57:37Z), 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/TCAKB2523729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7cf6d2b7575d17d78a1d76ec672beea60ece883d974d5ab1c0eadee5594b45. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:55Z), 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/TCAKA2523530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9544856844a89899a8cf692759614115ba4235f32676e92023cca0ccaaae5a3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:31Z), 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/TCAKA2523340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2233e302b18cf7ff0558af7bd666f9eb69160edca1ba41d29b0253cee0cdf1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65W2561691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf9594a4b9a499fb6730698a3e1504d8150bef9eabb7cf92a9a2c3db9b9e32. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:53Z), 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/QT65W2560423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3cf48714ae7cc96bce71dfe33177bd84ea566683c053afcfe8a1726cc387b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:38Z), 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/QT65W2561384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da3d3d55107b413de122b25c9cc2495effea047d7e2d292463cd5a9f9ac68a5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:49Z), 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/QT65W2560840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dd09dd1208ad565b87e1c999535f3f2ff29a4db77932b01f4d59cadc98a795. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT65W2561488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5575781e493c4d8900b1b8630c458e0f57cf6eb26e4fbcb3bd6a6d9367667d93. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT65W2561208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4c22bd534aeb7a526a4253d0ebb729900433f12fd4cbc7aec52f037d7cebf1. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QT65W2561117.