thumb|Jiří Dědeček (2019) Jiří Dědeček (born 13 February 1953 Karlovy Vary) is a Czech musician, songwriter, poet, translator, writer and author of numerous radio and television programs. He performed
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 0x735ce79f4063a6d29a8ac9b94fe53f126c65167c7a5be29e3745efd80457aa70. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aed9fca8-343e-49ba-8367-63a250abb834.json and https://artists.proofprofile.net/proofs/artist/aed9fca8-343e-49ba-8367-63a250abb834.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Večírek Rozpadlých Dvojic (Vodňanský, Skoumal, Burian, Dědeček)
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 0xe4012f804c3768e3aecf692f303444bb48b53a4a827336d4eb9a046b8533039b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CZA169000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a00f68d64082bc1721eaae90eafc1e5ff4a00b88d00b2cdf0f3b3e1d72cd348. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CZA160800399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20809db1deca7bfb9e9fad2f94b423f5c53d793db5f404e9a31096ca906af1. 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/CZA160800400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc70a027a32d5d950a9e51f61601456a55b8dee92a7545086af367aa25be6a3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CZA169000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf8df9e4835fd1b1283b41dd6c327130ebae7945b9f89716404ed01bf5ff84. 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/CZA160800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0420cf97c07342fc1b0aba63e0827a80bdb0d8a97257805fe5739fd1834e7b12. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CZA160800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4658fae2e624832d6081ae6d4e689e962a4ec7781f473feb0244d37ff4e25b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CZA169000475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d483c271568e0cea39230663df2fe7c9052a80534fc6b6286fe16aea414cfdf. 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/CZA160800404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a7339085981e47bac44b531c7615c2115e148125fbfeff6b3fe4fc150eba7b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CZA169000476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc373cced8443dd02fe299e2131253ac1a1183f60818a985c56df57882f3257b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CZA160800405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d788f657411d34199e82febf551be0c48e6a7bf977e0fee6a2a0f6f0b9845e0. 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/CZA161001691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb41e6aebad8a3f1302c093869490dd1960fa4858995ec91313297b8dbe0a23. 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/CZA161001692.
Blues Pro Sirény - Pohřební Pochod - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47b925566b1a7aaffc566289c2afada9a2287fed47336a23920118a7969d978. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CZA161001694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c83da3ff47d96f3b3ecaecfe5af6b9e139d83b11d83fa80fd519e8c0fbca36. 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/CZA161001700.