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 0x6a63c8595695523e84c5fb35426886c122b6f801779c5d10cbd03d23826d7ac1. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cbf6d8a-1af0-4f35-981d-ae86bc70468a.json and https://artists.proofprofile.net/proofs/artist/9cbf6d8a-1af0-4f35-981d-ae86bc70468a.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 0x2e97bd17853a4e2dbbe66f6a25ff15fa7ea809c9d016bdc63e33dde51d139197. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2533660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec3dfd3a521d8f79d4f6d5b75634f9b9a21990e55a5b7bcab5d46d9c64e4bae. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNB2533661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba2db244f91b65b2700f7309111e3d2ce59d6a3833589f49409a95beaaf1182. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:37Z), 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/QZHNB2533662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ba73d3341a5f93798f22d6581edd955dabe5a3a686556e1e017d344979549. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZK6L2545011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7d9b8fb97f4353b3e4bd8d8cccdc870e2606f2aae4d2f0d60710a5b2089e2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:00Z), 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/QZNWQ2560978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeda12d352ac15eb8ab9cb187c75d2e99dbca72a05af9b88bca5487d9f6d79be. 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/QZZ7V2598217.