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 0x1fbc6d37786a9ce7fc4765ba1a094efaaa49ff8552c98df1e83ec58cb71d68ad. 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/ca1a1e47-b805-4e1b-8884-37263424798f.json and https://artists.proofprofile.net/proofs/artist/ca1a1e47-b805-4e1b-8884-37263424798f.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 0x25f85b9f3aa87dcffc7e947b1a54ad96f48b83b9ff5893cece05d99c5b53c3c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDQH2383505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe71f5ba057b6f4878d376df2ec7bcfe48758f632b56a4a1e03a9fe6209bc495. 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/QZDQH2384501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba6853d5e5b0e7f3e6333e651e2bff97be8a1621b6d671c94abe261bee88700. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZDQH2392251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb93d652a108c50736f9d28ef0458e2e35b950491eb0c9e48a4c98a7d147cb94. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDQH2414822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664c03d8a8737ca128a4ba9b1acf07a963c451ed72f15a30ac709e19de02d9b6. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:03Z), 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/QZDQH2433091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a0d7277c7b247219b77b7aefc0bb755741c3dff4c3307033aa757a55a4d95. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDQH2440635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf83f90482c905c9d2a4dbc8bcf5d494d688dcc080c4c4d3d9be542187e4c3bd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:24:10Z), 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/QZDQH2440638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763cd47ccfdecb897ee0c353a58d6f18d206c1c4d0e0400c715cd1e588986b2. 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/QZWDW2593612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ee827ec69ce13780f9fb9da24ad585b79cf4c54cbc2915f445bfe104f5576. 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/QZTPX2391461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe044b4162bac0e6e2036ab87c23c13acc424c94934a7b8090031e65638aadf2a. 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/QZTPX2332796.