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 0x72123f9e7a528fc3398c46d64ef677e1c4b451bcf356c08f3a4cb210ca81279b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2f8d0b-ea5c-402e-9ad4-5919558b9d5c.json and https://artists.proofprofile.net/proofs/artist/9a2f8d0b-ea5c-402e-9ad4-5919558b9d5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Koť Som Ja Maua Bivaua, Ej Pujďem Sužiť Pujďem, Davaju Mňa Pitaju Mňa
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 0xca8b04af46df2f9f31838147097210fc07de9eab069d21b814bacb63111a5e53. 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/TCAFN2126451.
Vichoďi Suňiečko, Pot Obuočkom Murovana Studňa, Škoda Ťa Šuhajku, Ukuj Mi Kovačku
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5ed479ee6afd849e7be70df343737dda54ded9a1253d5c34beee8d281cde7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAFN2126468.
Krsťini Krsťini, Kmotor Sa Nam Smeje, Kmotor Kmotor, Kobi Totot Kmotor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f260183eef25f5bbfbfc5fe2647ace3bdc01571fedcfac38d27d5a430984f83. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAFN2126478.
Dobri Večier Moja Miua, Koť Ja S Kuďielou Pujďem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a344e4134262137fab51478eaa4470666f877396115db3096e7adc3b35f1f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAFN2126493.
Saďiu Šuhaj, Ňebua Som Doma, Ňeber Si Ju
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b4945cb2c565e23a91e329fecb35291c00476b7e6e684ac3e30a714fb82a86. 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/TCAFN2126496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3711cf3cdda336d0f6876119d5f28422aed50b919f203c6f43e5e7d8c49543. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAFN2126499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccab42114fa5ff342a65871913fde15c75bf83c2d8c32a91a145c73765da0a2a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFN2126507.
Pri Jaročku, Ňežalej Sa Miua, Dolina Dolina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e176aaaabfe09c508db41b3e3c69250d00da83431895f7d8438b37e7ff5c10. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFN2126512.
Uastovička Fčas Rano Šťeboce, Spoza Hori
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3604f15c381f1543505fca7d43be02fd678b2ed9657a4582a070527fdea9cabb. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCAFN2126520.