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 0x36039b16af7cff49594e9797877bd92ebf901a23c46065d12094961dedaba97e. 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/04e614f7-56ca-4970-9927-c0ffd1ceaacb.json and https://artists.proofprofile.net/proofs/artist/04e614f7-56ca-4970-9927-c0ffd1ceaacb.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 0xb682f929fc648a86c9b1b819e0624a01bccc9c20d7aa268c0c59fb7377dc16e8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/US7VG2315768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323934450e2d25d7ebcd68081168c5ed95f493290cd1d20b364de0c1f21041c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJZ2304065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356f48f824db6a3e6236deccaa392cf105e70ea99d02a665db39cce75a5182d3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:00:22Z), 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/QZTVM2355678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f1dfe383a53206a46ed300eeb9d1c0b9ebf8dea1b5f5f7612fd93bf220992. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ72449175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37deb1ca5d83dfac0c48f360ab90555d3bfca69c9dd7f3ad3a0c4398d411d6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJX2401775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9650fa760df4983da5557e5932b5a8a694c20316ae01afe4899371b7315aafb2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJX2419199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a35692344fbc11e076e4545b7d7fcd23a26773f15a8b1f144849b00223958. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2419200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d37deb1ca5d83dfac0c48f360ab90555d3bfca69c9dd7f3ad3a0c4398d411d6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJX2401775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f1c880cd5605ef7f02d7d7649dc81fb9e04884a9a4b95605c9fd3ea536aa0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJX2419202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75160e8360f7b6263b42ae8546e69b5c093c40f5bf6dba9cc6f5f9b541f6ece0. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:45Z), 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/QZNJX2419204.