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 0x1cbcc0e5877b80ff8a7238357a25856cc1127273a1a1c9b65bc070bd2b733fe5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b06daac-5b84-4eb8-9340-7b1d320c1c88.json and https://artists.proofprofile.net/proofs/artist/7b06daac-5b84-4eb8-9340-7b1d320c1c88.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 0xbc0042c894f7fe209bd020590dbdfd5faf1fa9e4ef05781e6ed3e0a56973039b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:52Z), 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/QZHNB2536496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f33835379005b5fb57ec6ec7d053b71c3e398a4acbb2b2b5a2acbbc7436eae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2549656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4c74065047d372a4a39716ec87799c6aef190aecc903112bec06d75230963f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2549658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15879360fde0392fe96c7f853ef14da840adbd8c584fc12f45ab64017bd39248. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2549661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd364253e552d4aff3b3cb57f31a6a62afee018079b984ce595fcfd0cc7d64b50. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFE2549664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05527a03c8985f2d4e2907efc3e6aabd9f47a5035782dd503feac1b8645cf13. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2549666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6b50fc12e6d6e2bb242ba43a02778926944b25a1c8deb6d097390005115158. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:29:45Z), 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/QZWFE2549667.