Kristof, Krištof, or Kristóf may be both a given name and a surname. Notable people with the name include: Given name Kristof Allegaert Kristóf Baráti Kristof Beyens (born 1983), Belgian sprint athl
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 0xb6aecf2f03f0de6ef5746756b8ccd7165376491d6b175b8f0fccd4b50ed1009c. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4d042fd-d168-404c-945d-613efc953c13.json and https://artists.proofprofile.net/proofs/artist/d4d042fd-d168-404c-945d-613efc953c13.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 0x575f2c4c2abd151a713b34020c56854c348389d301557086342abea6b56d7010. 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/GRIE11900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f2c4c2abd151a713b34020c56854c348389d301557086342abea6b56d7010. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRIE11900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866ae183184ca39df66a01cc260816f05a8be3c4e8071e4685a98e08a91b0e56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GRIE12100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97672b06a870f4dacea83be214cc1fe3c040b87574807b3395b408f717e8461. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ72557954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72140af92be92dbaa919e0ecbd43a4c98b4e8cdbe611a3f5c63d39f0f50cef0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6N2572879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837971557c1b3223ae64bc994d91910e3159d9560c116a3c59c28a31fba1613. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6N2572880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8599ffbc5502a420f74079997dcdfd76529165d91446d1790f1578f5069714b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6N2572881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe052884f9e3947a5bff781c36dcce5377f086fea2da90f413549b0690e037a0d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6N2572882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4d545fcd9aa4fb7fecd24374d2db7c03b1eec0317dc0fd8769ff80c8b08753. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6N2572883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b205ac0e206a4f06ac6a7f0b3481d20a909bc41f087c04bc2be3fdae09605a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6N2572884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3fdfa6b1c77d83b73611792d288663cd61d640c780006c0f09b6fab7e82f0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6N2572885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b6386dff3a46955c101243a1ffcb2fa5cdd6ec5bb06159881a7e28d91a0a99. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZK6N2572886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843068b87825c861ab8af948d7cd3b83b69cb5606c1d2b5c85a59d37252c2ffc. 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/QZK6N2572887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a998e91a9a8f70ac71db3bd1bd287d5b873425bf38de5e8e8cd66e2a5f8075. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZK6N2572888.