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 0xfe5081d17fdca050f6be0c90c50c8779de9b0631e08994829eedd5b223c851fd. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7394cf6-189b-47d7-8733-c72c2924fa43.json and https://artists.proofprofile.net/proofs/artist/f7394cf6-189b-47d7-8733-c72c2924fa43.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 0x2165871a95a05e817aa03b5bae0a3140516e51bfc7a0b5e2982744114663042b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOHKZ2502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15046bc5f74d7250b57e91181ea95475f863da2666cc25b7c919340f5bc5e36. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOHKZ2502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e3b524e97af92c21268902ef7505a7c856d719e136f86f23d3c408f66db637. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:50Z), 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/NOHKZ2502030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19f3f4e8e26c89b690a73d3502c5ace96481eeafc70234a905c698ec4a9a440. 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/NOHKZ2502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca08d5a8c2970603ecbede7da804cf42738a942fa7484d8a1213a26ea15201. 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/NOHKZ2502050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc124e2e6596e65fe30b5e2c28fc83cbc79fdba7ec2073412857f9e593c5a9aa4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOHKZ2502060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a98113283cc91175ee5e27faa095b5d6d1d555a6931a1b717557021b4b7657. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/NOHKZ2502070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387976156825ebc3c507411caa06ba2508c6c96a8fc7a73404bcfc585b2e8720. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:38Z), 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/NOHKZ2502080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631b79e7fa63a0def028ce283a42760b6f11312adcf0849ca9aff94f0245cdd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NOHKZ2502090.