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 0x08b66aefc0277f5162a21a9821516fa76f8ba993a97cb610dfc95815ad4b0cf6. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28e83767-2526-4b7f-9d45-60fb605d6ba3.json and https://artists.proofprofile.net/proofs/artist/28e83767-2526-4b7f-9d45-60fb605d6ba3.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 0x637fca9b4d200e76459b5dcd8776e7b3f355ae128895236762767e6de5cf34f3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T11:20:44Z), 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/QZNAW2505001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9097dbd40a06e25167d61356c0a72c20f7a9571c309827f8628b6937e1a83be. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNAW2505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c79814abe5f6f4c20a5b94b9f1b97b89c4094af7a853b71e6bf60e6e1c6f31. 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/QZNAW2505003.
You've Got Everything a Sweet Mama Needs But Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494bd72705001d98dde4cfab7d31bd6645d8b987f956110e4990811072d4bcc7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNAW2505004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a1055fdbb7c60ff6802fc64e870eb46b580d5ca5c6d1fbc43816cf79e8eb3c. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNAW2505005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7130ba3088a4d5b6bd5edf3548f16c02d2b9f7b2c478f9ae4e6ad559200133. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:01Z), 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/QZNAW2505006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295fb02edaad550c2a5cf2f6c81b3e95c445b8cebde2055725e4768c23977c9c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:44Z), 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/QZNAW2505007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd8bc0c40fce8f70a6cb48a03e6743a450624f6eea461c19232669f905e1f0. 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/QZNAW2505009.