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 0x83b4f7b8e12b99b51f93d3ad5984e577be4169b770799ce91426f4e8236675c5. 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/d0d533c5-933c-4f1f-9f0c-25d0d801e780.json and https://artists.proofprofile.net/proofs/artist/d0d533c5-933c-4f1f-9f0c-25d0d801e780.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 0xb770d396d9eca9e9876673ac31bdf0bf23c3301c487773cc2c333e0c5e01192d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:33:36Z), 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/USHM20714169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440d2fd5acfaeaeee10792b1a6ce9e724e41d35961576789ddf17632c1e1af06. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:39Z), 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/USHM20714171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8751917444cee8a376311df6cd43ed00a7136e32084938ec225ce1e2b46db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:35Z), 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/USHM20714172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fe30ee71eeabd06b02928fb044731f5608d467416c3c2ff8f8a8bf4efc631d. 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/USHM20714174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592765fbcc7505ef95abbc733f2a974ab681a0ab22a7ab6627053ed7eaa3352d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWU30400018.