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 0x04b1195c1a730c4008f8a8aebd6a979f3a0e5cb8450d6c249f706af42c3ead8e. 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/7b661729-7248-4909-a272-dd57e484cec9.json and https://artists.proofprofile.net/proofs/artist/7b661729-7248-4909-a272-dd57e484cec9.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 0x2e5e8c02da3acc8eebb9a5d31602e1f7c69ffee3c59925500893b7d8734a7505. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN71904491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a78bd03c7334929c4ec58cbb6c9d51da07a848e84e191508e2ffe8521c667e3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q1958054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a77d0a6fecd1d6b1e213a359e7f7e4f4687b3bcfe8b996b65d79abb741d5145. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:53:29Z), 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/QZK6Q1957709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa85bfce36bc4535ccc78a9ba67f8fd35d7c479b54e9971b26e3ca700e73063d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6M1917952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf1e31e532c2187153daac9420b1e954119e13c63526483604a027aa3f18d10. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:26:28Z), 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/QZNJX2024274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c28ac282fdf02e106401dd551f740275c3db74dab2fa5d9de7bfc68dbe9b1a1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES92356302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452df3dc9a3c7fbb93e6ff7dcaf921e19ecbc2dd89957410d331a82b72512fa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEM2517579.