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 0x3148bcde1894d089dfcc13799e0662613dab00e48422c03e79266fa5fca9ea88. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/948d855a-861a-4928-963f-69f75c900745.json and https://artists.proofprofile.net/proofs/artist/948d855a-861a-4928-963f-69f75c900745.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 0x6cfdb8ac53882dcafd4fa2c76a2008dd9f68d28a3d50133b6fc14a026b501e31. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ0788391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44118690039e381fc075f13ee0707d011a7c7af51a2aed6a510b3ecd3eb0d36a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:34Z), 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/USCGJ0767369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde938f41b3d7f507733fb2214719d5eecfdffdd96a1a6d911c40cedd8432220e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ0767371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a172477cad6d5b46d2c710749b98425b2498eae73d3661c061d39769c181732. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:19Z), 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/USHM90692045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189d24f17023a13f6cb49fe72c334ba0459bc24d37e9b9672714c324cbe79e90. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:59:06Z), 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/USCGJ0788570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec602b142d5e03ea9baa1aed1071e622cc27f6a140972aff6d5e4b78f3377eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ0788572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde255066a124e5f6be7a2ebaa90ec277aac904d79ab0bd1ba9b7b94fe0b46475. 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/USCGJ0788576.