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 0x3c56bd3179dcec180816df5f42037efb5df001298ad09c9016ce696015547508. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2210d8e-23ee-4cd8-b595-7dc9a98b7381.json and https://artists.proofprofile.net/proofs/artist/b2210d8e-23ee-4cd8-b595-7dc9a98b7381.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 0x76f144c7f098ebf0e4018a4d8d8c172f2176ae28cc19af14bc7b1edd724a77bb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC2097241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46153522f31bfddade98588525d1b0efcff6521a0037a51f524dba2a08ce166. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:49Z), 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/QZNWY2047612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd9fe19ac30c93588e74d09caa9df82e830f8dcf42e912fc93bc24a9da2532. 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/QZHNA2086189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594257f28f33bde53acb03a14262c3a41b5af599dd3396f1dbb156a6e180350. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWT2081679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2667b60938150feaf8485afed37bde7c82121832829c874b2c03a7c1af059bc1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62146168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778100c58967cd786aa7904b83ca7e17d5a82aa1539b5e32a63dd81879da75e0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:12:28Z), 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/QZK6N2131735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36237b578ee273818c315cd34c8ec9513cf7bbf0aca5422f785abfb8c1b93340. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:07:35Z), 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/QZAKB2158618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8072b32aff6a2ef1f0fe01e38382e7e1e51c1b2336849b34030dce5a731bd814. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZAKB2166271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b563004ca0e48acc351979d715c9264622fb7d21361f1500e50163145a61da1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:39Z), 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/QZAKB2341342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80a688ac4fd4f879ccfcc2470effced1b27c6e8b78896269d054379a318f20. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZNJZ2397439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f58c4d0fb6c7460f5344d9036479c702e6794b85521c45777f0ed1286a44d1. 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/QZAKB2364521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56168fb68c78ff9e3eca1b0812980951b596486f41716de70f54d1e921b29882. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TW2419766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01317450db35f505877589cca0ee340f22f884e7d1bec34d32faa126b0bb0a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM4TW2449749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cc71c9a06bdc1b2cbef5918f62e4b1a59333c7515205bd87dad41cb08b1701. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6MZ2423193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d0ef4b5ff0627945dce4d060ea9033bb543ddb96ad3f3c28909d26b6acd1e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:30Z), 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/QM4TW2599313.