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 0x76b488c036975add2839ee8928fa37c03f9ef716a12ea42f7e37752f77958dfc. 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/b5910482-f7a4-4313-9ebf-1830f55ef354.json and https://artists.proofprofile.net/proofs/artist/b5910482-f7a4-4313-9ebf-1830f55ef354.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 0xefd0e2736d15c041df5aabe5ede059f1cb644ac3f3840aeb3a16664c1e31c43f. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/US83Z2037766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e590d6bd94ca908046ffdd0b0d32b0b9c2393385b66dea36545cc3d7ea900. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/US83Z2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a65ba8e25f73c1b04a49bc0fcfff9edea65b3c80797e2d5f8b0edb0147f4afe. 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/US83Z2312222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6690f3c00b79155a1cc473bfb912fa185180712f1df29630ad2107d58abb84af. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:00Z), 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/USHM22501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfdfd465a65f79a18db9074bfbc1b596b3f6368348c2fddc3c526b32f3b8c1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US83Z2332305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77adcdabba3654ca38fc250d432a81bf6d8d611f815cf4c56acd409a7c6455e1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:08Z), 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/US83Z2549945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5711f212647f1878b71dc0311165cd2e32ea2fb6b6c3fa32ae17adae2d8e2c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:02Z), 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/US83Z2213983.