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 0x6328c4c1302daa9e99f0d1c799d7898a8f729c305a501f637247101532f8f4eb. 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/9d0e7351-bb73-4410-a660-7b2fa83aac33.json and https://artists.proofprofile.net/proofs/artist/9d0e7351-bb73-4410-a660-7b2fa83aac33.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 0x8f2027f8612135364767079b45c7d82fc40985f8c6a84d2e71a64030d1559407. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZDQH2363644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2fb70fe86ed8df098c447ad7832bcc82f828bf3c3a4f3b816fd641ff22b97. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:05:59Z), 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/QZDQH2363651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9212eb26e85376b7657249135c97fe8558111f4cd3e4ba6d0d8dac2af13a5cd2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2363532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8c7204774f9cf5f14892a5bc40e15bdd2415b1ddaf9f7b69904c04dd579372. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:54Z), 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/QZDQH2363533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe438441451da33a2937b7ef6efefd95559bfe9b35bbb8da21976ce55d0836. 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/QZDQH2363536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a6d7418667f998e9f4b30c5414d929f6a7db618c15aa5078778ccc24e87caf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDQH2363538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0fc41935f8817c0e1c25f79c9e6f4cc0510f2486a08b10a8b99fa121f93ced. 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/QZDQH2363539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb79b607087c28c94b26bf57235b327e09a95823bb6f3c0a5153cf6aae60fc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDQH2363541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313b070de43d0d08f1c5286ae1d8ead56044a0e7698388237cb2978621919b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2363632.