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 0xbe30c072d3b176a8a104ce552c39ce90f1dfda774687d39ba9cb4f4ac3b0b11e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab7dc097-3841-465f-bf6c-02e30d013c12.json and https://artists.proofprofile.net/proofs/artist/ab7dc097-3841-465f-bf6c-02e30d013c12.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 0xac307e000e45cd5b7bfbe0252838e90a78fc498e9504d10896d41db0c2c6f553. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:57Z), 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/QZK6F2070214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97363a294dd522367db847a83d509de1dd682b3bafc32f54ce05c55b4162612. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:45Z), 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/QZK6F2070215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d864eb7796e22cba37dccde9c9daea43af6124f82641a080f8577ed08f8da4c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:58Z), 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/QZK6F2070217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c79e360cdb5f01841be599a811ac9dbe8fec1715fffd97382da6866bb810414. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2070218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122e677cd211ee28396eaa6cd727611706020c76d9154dc5b9088560a55af09c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6F2070219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c6d795137811b581cfba3f117dd738e7552355a4143822e2881bb48b933daa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2070220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c257b775f0061c7966e775ca969467b546f3329bd261a217a39753ed1ef20c4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6F2070223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790d651e69f64d65f4fa1ecf9848b03a693dfbaa9fb59a280118d3593a634363. 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/QZK6F2070232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb49f9fb71f715c49a74dfb4853d2907b793d4ca081b0d21d33e87d17dcd0b85. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2070233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ee42e4dd97c94dd5378ab8e6c329bd5d836a3fafc6412a50ed22c2e55db8a8. 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/QZK6F2070235.