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 0x146fb1609ae0607e251edfefa59c2444dfc1d5c72dea62739f6be791ba70a3de. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d7086ae-00e5-41a0-98cb-8d0272253bd6.json and https://artists.proofprofile.net/proofs/artist/7d7086ae-00e5-41a0-98cb-8d0272253bd6.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 0x72fc026c87d3f20f6b08c5e8f7629e9fd754983ac7d4f0f617892d90e156c105. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UK2671300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed40a40ef54d5c0bed82caf32fd4dacb425e17a1b0cebe1fbee96c38e43712e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UK2671300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d8f7dc8c892b590c2ab116cd3ce03f06d18d2fdf3376bad29bad0e72bba810. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:02:43Z), 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/UK2671300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed069eaa7a84a0885cf7578bf04d279c57e13e862d2f2e7ead9cbb33f3fb45c7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UK2671300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea3817457ef9bac2e52bb6498be49a958915fa7521f430495e3c6073587df32. 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/UKKJ41700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05062b6cb9212010d41c66768d6a319753215faa8a0e8309a924af35138f5e5. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:40Z), 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/UKKJ41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f3e27a003bd17173264b77ede59464f637ed0f5a4e74676baaddb50f734d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKKJ42300004.