Fifi may refer to: Arts and entertainment Fifi (Better Call Saul), an episode of the TV show Fifi, a Beverly Hills Teens character Fifi (Peanuts), the love interest of Snoopy Fifi La Fume, in Tin
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 0x66d96d373ec58af22c84d40b498232f863e1564c4b6a7697d02e4ff2dfff8269. 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/346f6338-3e57-44e6-b9cf-f87da0ca6e28.json and https://artists.proofprofile.net/proofs/artist/346f6338-3e57-44e6-b9cf-f87da0ca6e28.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 0xfeb384a247b697e250f9de47d43a013db2a9e21acba42388b3b3ee0d44dc5151. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DETO41734509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc9d450bf0b269ad268f030584b375d08dbd29e712c045a59c8ae408b049337. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX7852200426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e9b639b7e8cee9cf2c043e4d59c31eb4ef829bbb766fd21575adcc65df297. 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/GX7852200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f450f5ede50f880da9bf4ba9c5852fe6b0d62fdc6b9ca24f925a1eb00e31ca. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX7852200843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c873d15d996b29dcdaf841e7da9cfed286f1308662c420cf01bbd037e4b7c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX7852200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05fdb3e19d6d21f959395e54f258b0e82c228323ab5bbb7f1357ec1f9448ef4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:29Z), 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/GX7852200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7be269431b6dda14ffa529bc38ee380ac386bee2eb7bb8895a57373f6081b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:06Z), 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/GX7852200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba73c98526364d8932c9a1b4daf855cd90315e4707d8ece08b87891bd0af9e38. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX7852200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34db7554fe41fe012b4326c26b6d2b65a662d0e2f4531c3c9a642bdb5ba30c8. 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/GX7852200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c52b64861fc614615f79a77e209beb110050498fa602bd8a9332a10b2c853. 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/GX7852200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee755a0a4afaa9758d8b69c8c83c970cc3cf794bc8fe5fb4e3db9a991b6bf22. 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/GX7852200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376a159827db1193ddd332a85fee99eaee3b70c99c889aa980f6a201da48e104. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GX7852400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ab070c677051d5a5c42ac9352da419868424f3401cb64e507696b81aa320a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:06Z), 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/GX7852400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ad7b674bc4550208faed5b47a3eab41e71bff2dd2085fc4bb07edcbce10a6b. 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/GX7852400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee31548daddddbe431fdb2aa3161d565c805e137121b58079759e5cef6d2b3. 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/GX7852400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df433558161715c7aa72014400d45535ba201704aab9c68931dcccb23a61d04. 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/GX7852400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b72dc2f32ca9502c3442ee34c954f41729c8d5db86d8cc67b055d55b421d78. 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/GX7852400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f74126ad61db74345d3cabd8de1754118e2e99f998291b95719243eceafd27. 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/DGA0R2474449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892804a74c1f0ee586bee3c428c839da5bb7007ed2244239897d8efe38a5552. 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/GX4R52278334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bcb976e7828e1fd92d81589f8f85c7bdb8411faae276640a76dc901bae217e. 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/GBSMU9199606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b1b869eaae9f0a6059b4aed6354636135d78c2c592555978cd85d35f07968. 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/DGA0Q2431011.