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 0x44832168da4c9d99f1f1c524813a1e91efd86d3c928fe0cc68c2cc9fc59d2879. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebe3635f-885f-4921-bf1f-f5248e469864.json and https://artists.proofprofile.net/proofs/artist/ebe3635f-885f-4921-bf1f-f5248e469864.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 0xb2db2366a7df387c67594c3320b39716f06b55b0bc57efa2ce8836c1459eb94f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:13Z), 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/USCGH1344014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509b7da2c12f77602a17178e5ce30da5438cb4893ad29ae56b32ab383edaf51. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:42:54Z), 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/USHM21497224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6a53561faa96a0e904b20df4ca083ee2600da4795b13610ca24955673f1d92. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:00:52Z), 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/USDY42558325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8cb33cea1f5ddb1648e2f39fb14b4ac85fa7fc41f89c1935aafbb3895a53ee. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:10Z), 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/USDY42558326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770ed2a38b78cfd89e04df38a648e6b62249bfd2c0d6e8b66010b7f6ad1e8d62. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:44Z), 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/USDY42558327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f01f4ee7445626700cb7119444c7214516294ef5a25836525d96b2a8f5dfc. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:56:50Z), 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/USDY42558328.