QFX is an image editing computer program developed by Ron Scott, a Texan photographer and software engineer. The first version was released in 1990. At the time of its release, QFX was one of the most
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 0x861c7e6825bdee68a0286b83f14a68f0df40e0a59ed222dd7f9a986aa99c72c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28eb4fee-37b6-4e57-91db-2d70e3b38749.json and https://artists.proofprofile.net/proofs/artist/28eb4fee-37b6-4e57-91db-2d70e3b38749.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 0x873e02eb04f59f92efa3ca8a94e2a97d745c56922fa0d538cf74ea14045ce793. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USTC50810394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02901305950829b3cf3e2ed1434f879555a34ec988725770ea82f1556c017803. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:58Z), 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/USTC50810397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb565d602a5e9b74699726a252910626a47b479ded4b1b33b6e4f4945fa689. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:00:08Z), 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/USTC50810463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7fdd7bba4b0608976849ac82ab92ae1afd4dce1e659b4f16418fc32015a94. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:50Z), 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/USTC50810499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086982ed1f1bd9992dedd335255943f9c743e120eec578e31cee1040f319af9a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USTC50811522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589ec303d868e39006f4abd979f89b4ba2f83015fdd7e084e0ef620f8ffc654. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USTC50811532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b9e33a9b4f65a96437069225ecbb60908d0ae53d8bdea38a466d710b72273. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USTC50811554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fd9d0cbf8207e4c88f783ae5e5d54799996261b3b8a7fe637f1d3b3ec7ef47. 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/GB9FA1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599fa232a33c3e0afa208e2ab29e00764eacc80948532c46d7c315bb71b6f211. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GB9FA1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66385e6dd5189810045193c91a8ebe13ae7226023e6f18ca36e113be1f2edf21. 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/TCAGD2296356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ae459cef11653d4546d719db2e3004c23a817f071609d5470c95f5f065eae8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHL2316849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa540ff3915a7d9e1ed7deec1cfcc4a2a0c25685cfc9bbb3b50b36e39538c39c9. 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/GBLV62302307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ef4e1635f015b848cd56a33714b3f2f90a8cfa263b59989b89dec7598f417. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBRKQ2140559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf95f75e5f954f6b05aa6bdc5398ca1a2900818d415e51ff71f498a92700a0a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBRKQ2140565.
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