Cato typically refers to either Cato the Elder or Cato the Younger, both of the Porcii Catones family of Rome. It may also refer to: People Ancient Romans Porcii Catones, a plebeian family at Anci
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 0x6bcec4f949f9df5831799f1df0fb063e781c95b809219440f43c7562c9bb4edc. 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/46bce65f-62dd-445b-aac8-a22846897bd1.json and https://artists.proofprofile.net/proofs/artist/46bce65f-62dd-445b-aac8-a22846897bd1.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 0xa37a6b4e2d95fa5050e535362228943957129165ff62b2285f4e641ce2384bea. 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/DEKF22301051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a6b4e2d95fa5050e535362228943957129165ff62b2285f4e641ce2384bea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEKF22301051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21795a03ac2b77b51a3b47755aec373f36b0526c3d0a98b9314e0d147932c7d5. 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/DEKF22401075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9136c5ea823e665325fffa55d5c15a0e2a89d0183a8da4a5423ffa58ba74fa1. 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/DEKF22400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac75e23d575cbea17cd44a4ecbc39dcfddf8fff0af41dbceb6d45ff4f88dd349. 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/DEKF22401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f16d40ec9f8086b9f45d245c6db7cb660bcf631310555809a515ee192ad5736. 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/DEKF22401077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26c569e8cee9c8d5b59bd853249c72f66c5f4edf2fbcb5db6d795a2d3507071. 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/DEKF22401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd4294ed3aaeb6d0a82875bd3b8f610610bc69878192512d42df3e89c4e5ea0. 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/DEKF22400883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98081f395b459cc1261a7bdfc6e672d1834784f070b883efcb4fc836015dfc7e. 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/DEKF22301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3d6e06cd69304ef6efce04281f80b184bbe21346f1517d7a5a01da3b060831. 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/DEKF22301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960d22e4b55dd1894eb719223a6c4221f65de29852d69664dc7bbb03e6dad4c2. 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/DEKF22301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a6b4e2d95fa5050e535362228943957129165ff62b2285f4e641ce2384bea. 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/DEKF22301051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08364f82d959205ffd064f9d8db26700a498ac07d7c4d4637e7ae1d0d54227. 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/DEKF22301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265edad35923f813833e5185706b1fabb629e71aa2d9abf87030d15b774835c7. 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/DEKF22301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129527f29b8fefb66cc5274d2dcc0f5b42ff7079960af854292167fc52b95479. 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/DEKF22201332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9b80ea91d46910c3550f6059bb9d71859d513eebfea5af6f6621c376a5b990. 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/DEKF22300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5618c9a1e270599e3dfc76c6ff28cc03b00b3218544c9ee9df8e7665a074f4. 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/DEKF22200882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa286d65c7a642488dcd54dae4230b9f4bb2e3b21785919b9c989075573a155. 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/DEKF22300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc35c0cc62d06a46687d2ed0bbf313c111c75467765cf2ca3217da32c34ef485. 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/DEKF22300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd7d2b8db58ed4ece344e1a2dba480725a81c40ee911102105bbcd6c59ce6f. 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/DEKF22201279.