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 0xad6070767bd65436caedaf7a85ed8ba70bd610d0ab36c4b50db0a8ec8b7c2689. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/696a1699-2050-4fe0-9595-2869052be37d.json and https://artists.proofprofile.net/proofs/artist/696a1699-2050-4fe0-9595-2869052be37d.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 0x9c20fcbd5943ba87fbd6daf3752e2f9e4e449f69bd3526ad1d8844c8b278e757. 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/CZA163357154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c973d582f535d0a790e9eaf9665f946da996f5bfc3baa135080ea9c1f88d05. 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/CZA163357167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3620bf837d003fdc523c21e2aba441cb7a6a6d1f109b77a389c22262f4200b9e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA163357178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66b0fe04405e58c17477bf095664b2a5f7305ba1653f858881ea057ad7492a2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CZA163357181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50c6edcdf77849f7e50ff2ce4dd601610d7136d53bb4e301985ffb195a6019. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/CZA163357182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1fdfbc1df6425d4736b624dfc431ac3d4758fa62fe6e9c20534987d5f7491e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZA163357093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcddc4e9f95585e5f0c5af7d5ecdcc9c47c0052bcf9fe66b8733ef645fa67b62. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:16Z), 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/CZA163357094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00f597045413d1ccb82c58e13ffde635ae57f8530a1139c73d737e1815497a. 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/CZA163357097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706599794ed7e6dbfc35c389b5de28b96c7452b33754afb7e018723c7d11819. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA163357104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54814417e01f7a4ff071644f0cad24629f86e7546fb0de938501fd0a13189e9. 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/CZA163357128.