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 0x85bead2add0daba3ffbf247fe44c9d455020e035af99a69335d858475f700093. 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/a0eb4055-78d7-45bf-b4be-ce27e5b2e257.json and https://artists.proofprofile.net/proofs/artist/a0eb4055-78d7-45bf-b4be-ce27e5b2e257.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 0xcc543c898bb022e6b3f253372b8c940bdf00e0054b6ed90233aab1fe053627ec. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CIUM72200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9eb2601a6f32be0194129d182eeab5946315c9a200abeba766a40825174cc6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CIUM72300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30354b93e553928962fa7042992f0b54885ec9be74c9e634f288e51185fe9ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:41Z), 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/CIUM72400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95c777c33c6f6bbd60bf47e6928411fae0f3771b92e5e0d7206331f1534cb0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:53Z), 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/CIUM72400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca810cb82461838a10d77e378acfbbb4a1165adefa26b56ec4d55de1254f647. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:16Z), 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/CIUM72400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc543c898bb022e6b3f253372b8c940bdf00e0054b6ed90233aab1fe053627ec. 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/CIUM72200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145ddfb6e54b099d126b4aa44aeda28fc8ae41826cac06125ae35ee5ccb6b023. 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/CIUM72400030.