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 0x094bc7f1c27969b4e1f8fc63d5e5139a596eeda8b93d025d9cd19dfdfb44fe6a. 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/f85b22ef-86a7-42dc-8563-49ae9830628b.json and https://artists.proofprofile.net/proofs/artist/f85b22ef-86a7-42dc-8563-49ae9830628b.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 0xacb231f1cfbdb4173c6d647eeacb402876d2f091f08acfd74389b9387007583f. 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/QZHZ62043396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bf3a2347fde9c84b06ededde65926300856f1a504223d544f3669c0cd634df. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHZ62043259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a3530880e5583e655598b8bc3beb0027e8ed3054a7736924e309952c79de86. 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/QZHZ62043263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1912b0d9a62ec55c15434f3e4faf63b373f4d4971d63ceeb2dda81c123f790. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:07:47Z), 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/QZHZ62043584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dc8902375a7f8bcea1d291702e9c335a15c8b5986f896e29189d08f9e22ebb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHZ62043841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49228265b77a378bf4e96d23d5fca7e87a8aa3961327485ba4502fc531434760. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:11Z), 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/QZHZ62043844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f0746f5e745876f2b547a9d8a5ed1338063cef43ea68c5461e42826cc2989. 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/QZHZ62043985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745861c79343cfeb541e506b2ffdd6971ccdc095404cc2a5a82b8411841c42d1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:07Z), 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/QZHZ62043987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbde531099d2cb03239389345702d2e360e7b5ca768619ce6bf51726075a1c9. 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/QZHZ62043988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318f773f7fb2fe25449392e293aedb9f35c3502bc542c19598dfbeea2c2e49b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZHZ62043989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b98829c30005bb74364f8cec3c8fc9c5b7939d33251a15ee923d6b7a5fb4eb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHZ62043993.