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 0x3b01203cde0be99fc0d935c2a5e2530b3e4d4d63a1375626cded2a54cca64a33. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7aae34e-0f62-4432-9151-c1b12655b691.json and https://artists.proofprofile.net/proofs/artist/e7aae34e-0f62-4432-9151-c1b12655b691.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 0x6f038d95270307137e47da2eb434787c460058421f2d6764a2cb6fc5bc0228ae. 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/QZTB32262912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9125c50e4abba774ba7b7de5d9b02008cb127cffdddfeaaa52006e4c6800964. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32224866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd14c5378716701f6d7aeada114db54e5ca0bee9cabf397ed88c57a691777a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:23Z), 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/QZTB32262914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5304b54afe934699bb22454bcd9ae01df0304833133d01c105e3c0a138cb0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAZ2208515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b57d07ae05e9b36c53c65d82705bc2eb4ef7d3b3d25971cb4328e5b2c75c8b. 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/QZTB32262916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a29572ad951f52d842d5fcd50433507e13c3ae24bf4bed108d2be50a646cd8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM6MZ2410625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cdea66f5ea449a37fe6a4e46196c2daf2499f30a50eebb989d6b54f0c31383. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM6MZ2410626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b5e1c19090fb9f9160f1abd67bd3e2d197c468a433ccee08e5bd2b5a62ff4. 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/QM6MZ2410623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbebc31b6e255fe51837fea3baa2c59c6e5792ea6ea0682f11c6ee39bc066086. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM6MZ2410624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a29572ad951f52d842d5fcd50433507e13c3ae24bf4bed108d2be50a646cd8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:42:45Z), 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/QM6MZ2410625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094f05c61f70a4780558ab3dbfbc2da620a13e05a8f324f27625c700a50d6d7c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:43Z), 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/QM6MZ2410627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c25b31c15a48007698b553d4cf8c68ddc809fb185f8901fe14152ca0b1c500. 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/QM6MZ2410628.