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 0xbb550d8bd4c907a77ea6b55f7e0516e7a50eccdb783eeefcda2d9fa790d982d3. 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/bf8557db-a3a3-46ef-afe2-96c37aca10fa.json and https://artists.proofprofile.net/proofs/artist/bf8557db-a3a3-46ef-afe2-96c37aca10fa.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 0x80284999b9e111f4a1cf203c22f2c6040872604bf34148d74349f3a92d4f563e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:13Z), 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/USCGJ1095251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fd393bb15dbe8805f7f36804d01a735a70144726a29dd8498b3c1e6da5bd17. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCGJ1095252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac732f34b0d494186f4f767d72967f2dc06db39ee034206e918048400e301374. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGJ1095254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499e901052bd5c15526db87287b54064e718114bcdf37b022383ffb957bc396. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ1095255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0181fd76763b6fb721df442f1e0f92db5e5dec65d41424ea4427d18017f44b98. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USCGJ1095256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f3400803f7223532fda476227168227357dd45e3fd4f82e7b7ddf0052d8d3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ1095257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c352e2fb7ea9b03197942255366c49ac26016e5c120371760499997f0c98a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:59:29Z), 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/USCGJ1095258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c9d2092f3bd881f0db1d4c05f561de9865fc28a3fc40e4067f1f790518952. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGJ1095259.