DEZ refers to: Deir ez-Zor Airport, airport code Deutsche Entomologische Zeitschrift, a peer-reviewed open access scientific journal diethylzinc, a reagent in chemistry
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 0xd4492ceb15c7f512792b0d31e82b866a57c0420fc78725f50d15129a0287db98. 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/51faf629-4677-4a1f-ae7d-b43d9691ff17.json and https://artists.proofprofile.net/proofs/artist/51faf629-4677-4a1f-ae7d-b43d9691ff17.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 0xd7ef2620b386a1cb66bf15f1665e4344b18a86712859130e51d72928cf59657e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADG1727903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc742088dc34cd4ea9305e3560a04a7766ad9e4c57c034f067e28bc95f24c9b94. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADG1727904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b93631a52d5435174d7a8b23ed1843347f01fe2989c4843e33b0feb2a4c46. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADG1727908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc204db8b10cc1b54e5cd84311db2079f10ac55a4f653024d55f58aab75a49a99. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADG1727909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1a653892b6a1988e3b68264d0946b0335d945a82748913374bedf74bec26e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADG1727910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf903e194bffc9b0ba2910c828e0d5f15b9f576ca355561cb062a94aaf9832c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADG1727911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90211f4c7a1fec2c02d0ceeb290a0cce7800d99eb2a7143f3d86301f9ff9ca9f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCADG1727912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f4d7810467d162bc2dc1d4aecfa75d32ce7fc6110a7022466da96fd7f00fe9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADG1727913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ff1c095bab529b2da0bc55124e2182126abf2ce121d253613321be20451da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADG1727914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c34fef059b470119f64452bfc4e85ff8049a7f827b897bc0cba5739e6d523c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADG1727918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e03c154819c660437a61c10223f4a24075878c567e6934e174bca143410aa4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADG1727921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc97902cab55a7f465754e8ad1589e282a7a2621e715c2e314240a8f88c8c21. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADG1727923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0fb18005159b4c54babf134a9be7ee1a0b3a0993f6b0ca6a4d7a868067359. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADG1727924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6231d513c47da3e370819d54dcb063c25b02782370698ac9cc72b8d60ac6e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADG1727926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9f76f5ff6b4e5679de50846bfb662d99f8ac29076bfff5f86eefc40fcfa48. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCADG1727929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3617394c3ba5d5fa06316b3bb571a0b4610b58171b8bad5ffb31ec998b5d0b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCADG1727922.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch