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 0xf19cfe049ea9911bc4fc411f4bfd91305fccf5b5289182a97620eaa55d95e7ad. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7b8065f-1783-4f58-b1b4-81a0af3f8cb7.json and https://artists.proofprofile.net/proofs/artist/f7b8065f-1783-4f58-b1b4-81a0af3f8cb7.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 0x3d7a5c8cdc876cb4b4695b56ae4104e8facbaa776997a8237b30a8d7e10f6332. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:09:00Z), 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/QZFZ42006656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa545a8fb2ec2b00ea057563bc9c54ed99d1acba033bdfdc4eaefdf0429c279ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ42272083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7c71bb6b8180dd048223c8326010797bb671bdc0f2854c1c2c3ac5db20db3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHNB2244206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166abd11a7a92b71f8daf508c1804634d1d63cf99909a9b3201878badb68b873. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:28Z), 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/QZNWS2269594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343e6db30100c96fdfa3b67c98d7b7c6633eef465f5a29760f221a8615a96bf. 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/QZK6M2350060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe6fc5bf6e0562b8d578bc22973cd0b1aa1a3e3a4ec4aab3837b21f01772d63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZSYP2353617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1696a48133fb4bafdced68af72fcef38c1f6b952848b0393047db61f6a9a478f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTLA2559215.