UFF or Uff may refer to: Paramilitaries Uganda Freedom Fighters, a faction in the Bush War Ulster Freedom Fighters, a loyalist faction in Northern Ireland United Freedom Front, an American lef
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab696ba89b319be4d7acf27357e3a288d34baf0e176e8f129804631660a2dac4. 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/c87350f8-ff8d-49a4-8276-5e5363357776.json and https://artists.proofprofile.net/proofs/artist/c87350f8-ff8d-49a4-8276-5e5363357776.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6c4a1f38cacca79ce026a8e86594f88d0efe6e83c2a20434178421e95ca21. 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/MXF140100466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748c3bf606beec0a1230e724cae96c2af60d62a5c7b792447ea47738c1e9add2. 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/MXF140100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17092390859ed5c730f190eda47fcc62f53b52cf398ace3f4d188cfb8cbab29f. 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/MXF140100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b641da32f32e966aed5825b606fca3be007d14b12a8ea1da09d83568f1ef4b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF140100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628ac4d105ed41f58967f34d9ac3e679bf00285075f72281379ef17dc9124a9d. 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/MXF140100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd558288471c22e413e22a571b7292c434adfd2e2912b3efa541ab7f934acbf. 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/MXF140100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437010cb4bfbad4c16e6e58cf368c3a5cf597a0f7061df92b79722f8a7fa31c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXF140100471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610bfa19508aa9a86a7dad006da05501327849b20c6c599b4aeee96e70acc383. 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/MXF140100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33caf839e4b99f9272714a1e67aacb934de4c4bc2bf0d4324564ab215269171d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXF140100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde367c484dd36068157e420c22d85f6223f448d12924d565aec75fb1f0670b27. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF140100474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b69ca477d92ebf3456182d2e2f91cc64b4669bb22714fab554463d895350b. 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/MXF140100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced7012ee10b3ba418a9b1757e6300c9e3d191937b85a6b76886da91e77fb6e. 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/MXF140100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573e02cd2949009e76b329fd636734f7ab3ccabfa1d70c77c617a8a2009b56f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXF140100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f318b6b84c47da7ebc4ad4e5cce0a2b784c3d996a42d1831f03d225ad6ec1f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXF140200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd07b0a86e3c8859d5462c7b1fc97bd9c9788e110ffcd660481594573f44a1. 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/MXF140200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46604e977bb5303739ed87a478d9b1d474bec7cccde748011373d5a618f10469. 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/MXF140200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f98a1ce701c96a89c562464d7f30f9441baa2c3e09d1c3750e5980ab09583a. 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/MXF140200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877f427604e2fe73f413cc8b32717a12aa49941b3c222ec2b75673b537bd158. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MXF140200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015c27e8aa7c27462ca9ca05a2ebafa5fa1c18d3844c381b3c8f876cdb4e7e11. 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/MXF140200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce9e9480e7fd79c9379c38888dd2fce5c8d306d6f1b34f15c0e0ad43964f076. 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/MXF140200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52e3ad414961468a803b4256239ad8366f73d7341219c217067815e8428338. 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/MXF140200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc726e11bb2b6708865ea082a9bd028752be01f2b1b3055d26690107a833069c1. 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/MXF140200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36330230b816c4d32590e36bf232e4332007f54fa6235b1aef41eb2287d9deae. 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/MXF140200404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbe54cec7017d20894aff933bdfe6e19a1e1d84cf078fa17d716f5aa5dee9ce. 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/MXF140200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5b78330fd0f1f8c730c575a8957a35856daf6a8a92c7d375743aa8e6598b17. 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/MXF140200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc76e1c8d3beed971cf53eea1a5edb385c9a3e85e5de3bea370a43c83fe741. 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/MXF140200407.