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 0xd7ebb65b313c4ecca63d97bae514f57d8671b9df077b1d6522f090c5a9521db5. 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/c27c1626-4afe-46e5-b660-3a9bf1647bbe.json and https://artists.proofprofile.net/proofs/artist/c27c1626-4afe-46e5-b660-3a9bf1647bbe.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 0xf8286ac3b38e8a985a0b6cf4b82217a94ea92bbc92cfcdc1bbb77cc359ba1cff. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:38Z), 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/UKEX32424096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f05247011a581499e08f81674d9ac3c14612517f01f1e3a3cd46ad871b0256. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:45Z), 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/UKEX32531063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5874e8a731042515e593f253d9271868dbd3a118559fdaab3b8f0b4d323b2736. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKEX32531065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ed6828a1564642df0d63ccb5facec1c523aa22a0214005ba16aa3975ca15e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:17Z), 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/UKEX32531068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8499871c2be000c250f9542b873a7260f40f7e424dc4884f6775d73d2bd304. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:42Z), 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/UKEX32531069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd3c9bd638040229958b8610ef74d64181e042c7de1c7a656fb40a8f86bc7f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:21Z), 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/UKEX32531074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a04148ac0b29398ac0df2efabdac697ee1de8ad8b5d38cfdc5c304df2690a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKEX32531075.