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 0x241b98cb1dd501f6ec38348873f03340747c59d85091cad50e65962ed86fc649. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/756351d7-706a-428b-80bb-0f2c9e0f1241.json and https://artists.proofprofile.net/proofs/artist/756351d7-706a-428b-80bb-0f2c9e0f1241.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 0x5a9541740266c07cd81d7245dd8d1113b05c89bbbc46d655177f6bea474fdeac. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:18Z), 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/IL5842342805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4df9aca105b851c82d7f9a047cd1eee608c25841611f69df76754ea9bd6d08. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL5842343809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761d326ac616d44a2de134ed56458f828fad72101f5ccca9ddda3e9c616b748. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IL5842444647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2d3a3e2c3aa213b5921148140ce249237d0437085feb7e11cbd7c0f97fd94. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:44Z), 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/IL5842449702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b4ec528640ab52aec7b7ad2bb7558a4f395cced96a66137ea355077a604685. 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/IL7192500804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9775b9c7c4f4fce05b97ed956f668d3c3e1253b37198119ccee53e9bf58b7b6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:54Z), 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/IL7192500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b2f2282eff706120d8d49f83434cc45c839006a6ab4bfbe70287b5acb76c8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IL7192500964.