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 0x86f90f1d592ea5e82976fff4305804aab335bb7830ddd4ad257de7388ca920d3. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a17f59c-a29e-4dee-93a2-e7b943902c91.json and https://artists.proofprofile.net/proofs/artist/7a17f59c-a29e-4dee-93a2-e7b943902c91.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 0x87da3ebedbd6cc16ba6fca21d9a089c91da971204cdbbe14840eaa9d7da7fb44. 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/UKJ8V1900002.
If This Is the End (I've Been a Fool from the Start)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f28209bcfe42417bf5d022344673e3ed54b0d51e73a26e1cc63001d5773be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKJ8V1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f6869010ff0f755544767025e503650515a29f938c964660ad0a4bd87cd25. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:39Z), 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/UKJ8V1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d02f071da2a4b10f1b9e086fcd734ed22e73a1725bba1711a8cbb8229712ded. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:13Z), 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/UKJ8V2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0edc94d0a4713dfd81073190bd9cd8c3cad6a3d3dc44900b34899857abedc8. 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/UKJ8V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd4c62176dd42d76fb056238951437b7cbf10858662d02b2842ea9829f661d. 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/UKJ8V2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb85318860b37e3aa3e66332ae85ccacb7ff5ef2b674c1bee781ad33c20df4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKJ8V2400001.