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 0x32d86c03ffa2a4a928dafbd8b2ccb338a8da2fa8667d3d442941993c10c9dc8d. 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/e97080f7-acb7-448d-9756-b8fd23870412.json and https://artists.proofprofile.net/proofs/artist/e97080f7-acb7-448d-9756-b8fd23870412.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 0xc939e203f84297b2b9170c0329ab39af03bf8b14dc169b355045598b2bb977ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:15:45Z), 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/ITB552417311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cfde9f2890e4ab0682aaac53931c2fd26fe797424b354855004b887993f6b6. 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/ITB552417313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d64180759351a5507005fefbc209e123bbc4997c94f5100837ff40ece23e4. 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/ITB552417265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14af32867f558569d4c30a9f28c0f0d2b8e21188ae696dbc9eac2adc61dc614d. 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/ITB552417316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58dff5aabe0da49d2ba91b9196eb055126910fa5a2a7430c803392d43b38744. 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/ITB552417230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d40bc96cdcf7155d4a943af1e9622212204f27738b7828592bde5d2f3fba8. 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/ITB552417317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1edb7ef8dcf46d9f1fb84aa8d5c32350125778ada5525b05335b023ddaf5a3. 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/ITB552417299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891427cccad935df875676dc8f74478e2e143f555362ce7186d5abfff1196efe. 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/ITB552417319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce50992578e6c2956d328f624a56fc4474845882aa5e272dfe4b2abd81e0c71. 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/ITB552417320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f3b39b4e8c87de59cdc5398b10b79d5f0acdd1a52518265ebbd9fe53fd0c81. 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/ITB552417283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6afa9e601f676779111a68d91cd2559b0d109902bb00dc230a1403fcc191888. 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/ITB552417322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12e590af59a8853382c973066fb1b277ae51d802b92da533f852eab47ae7994. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITB552417312.
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 0x05fc5a0660e7f09172ceeab7cdafb7763029b78450e7694dfa2efca06a0f4071. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITB552417314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05c826b5cf2b3157f3940c894cacac16d8691304a1db1970036c6fae6088c39. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ITB552317087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a841586fe5858997d58939c70f9674b1349d311b660c18ef82b6b177c3b59e0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITB552417315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7db358babff0e54cb7bac6d6863fcb0f7547b69f96a32bee15b6b9e64e88fd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ITB552417318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901cb5a0cafa3facd3b53449ad88b48990eedb569cc065a94f407f3284d3d76c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITB552417321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ec22f791317b7db4042d3bde4de536de8627a604dc6ca29bbf0292b60375f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITB552116508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe57b4f687a02343d7d247a7c6aa2a8e410da658d6ac7c64ec4b3360df239fd3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITB552016182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be2d4443dae99188589199f4a98952c5275b9ba23afb0040de60a8639f41b7. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ITB552116510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be74fff6afae53802cc854f24299cdf8d4ed6c0e27ea7987bd9957d72e21c27. 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/ITB552116511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3d407bed378df7ac7348f9ae39c77ca8bf41e9ca9408effe98ef17299f71ef. 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/ITB552116513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10a7332da4a4fc112eac98f3d1e3c6f3687c2d4e9306444aa8f551e09e2456. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITB552116509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5995fe84854ec090cfb41691e1c243420b93fdd28abb792744e1d9cdfc09b7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITB552116514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee775d625c20998eaef1e18e3c9ba4ccaaf76405d96ef70af82cd5b4f7a3985. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:11:36Z), 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/ITB552216793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd2cfb35a06e237944762219d3a04ee9d6fd4ee326258b9b23362fe679ad0e5. 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/IT2G32100018.