Fatso may refer to: Animals The proper name of Keyboard Cat (now deceased), a cat who became the subject of an Internet meme Fatso (crocodile), a saltwater crocodile in captivity in Western Austral
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 0x6e81b3c334e11930b0ede7d11f74e8ef195b542faacc537c14d4739336cfc3d6. 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/ff2e8648-d9a1-497f-abf2-89572f6bd7f3.json and https://artists.proofprofile.net/proofs/artist/ff2e8648-d9a1-497f-abf2-89572f6bd7f3.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 0xaadb0e7c0d2f77135f3b9eb54ac818192f7227538e39ad12dcc3cc5ef80a65e5. 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/NOCKK2243010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e23e3608a65e6c758e082f6af50c67d6a9af058ed61635b8371a817cd0e028. 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/NOCKK2243020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29412c4eb07424d87d5090f3259d5aa0c1ecc1bb99b8fe2ced651ffe08a9ec74. 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/NOCKK2243030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc0e697347af7a1e35bd79afdc004f54a19b6415b75fe2a79c5d045ca49272. 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/NOCKK2243040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa256b3bae605e9e2d514753ae4dafc32f519b5cd9e42b5916f7fcdb0b2c4c9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NOCKK2243050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3772219f525e09201f4b27f59946260014000e9f1365251e921385e89d2f7e2a. 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/NOCKK2243060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125182629d0d0cba0cd0ac2bb71cf51b4150a90d999a7a7d9fd6c3e16aa03050. 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/NOCKK2243070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891757442b118a2fefa66d666485d16f7258351a8eadf3e613c8b2bdedc18eab. 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/NOCKK2243080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa035a11b909f3a114d83b3e6e93c59405efcc4ebc58e03a30daf77f352e7b2. 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/NOCKK2243090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf0dd8ab606b4fb11d72d3019cd285c63b72921877ac70c234a20146ee340b. 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/QZHN92331918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe3bbb117a5a771b2796e1f05911fb4da145f7692537fc58ac6564bf375570. 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/QZHN92331920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6812ff7fc856e4de32e1199725c56b9f269f6e5233cb745f2aa189762a597d7b. 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/QZHNC2302930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d16a5b18b8114edb2877133acdc6801e3e40a5a6a6f5b5cfa3aa733978b888. 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/QZHNC2302931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4efe3027581154231dcd57f65bc8e3ed769d42f47ace04a25dcbffd18478c18. 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/QZHNC2302932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b803515b92b6c2cbbdbbbb6dcfb838deb0e6fddaf153b6f3722609eb73ce23. 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/QZHNC2302933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf0dd8ab606b4fb11d72d3019cd285c63b72921877ac70c234a20146ee340b. 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/QZHN92331918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe3bbb117a5a771b2796e1f05911fb4da145f7692537fc58ac6564bf375570. 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/QZHN92331920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a8529049a21e1a5a229391237dd4d801b20fd1872b779bb8190bd043dd43d9. 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/QZTBD2304334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203edd78f70841939b046145e5a449782d8198854be51f208f919183df25a3ab. 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/QZTBD2304335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c86aa8e722a5e990cd7ed1b6c27653ce08dcf8b628940c39a854bf80597ef. 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/QZTBD2304336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811776e24cdd5902c1823033373ad0ae82c2f10ddcf120f256f06ea5cdeebade. 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/QZTBD2304337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ed106aac82d710de08c0f9e2c1a1eed66bd32b4c78ab7624e456713526c4c. 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/QZTBD2304339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a72065e46c142ca75d8ab9a43acc35a283e31db9a2a42609aed158e842b4c08. 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/TCAHW2423789.