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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fa28841c4ae861bbb4c700d8b217c82eb54ff2543b224e929be564c2f553d6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f4a3a1d-c0b7-4b79-ba20-538c230fbda5.json and https://artists.proofprofile.net/proofs/artist/4f4a3a1d-c0b7-4b79-ba20-538c230fbda5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Výlety pana Broucka - edited by Jiri Zahrádka / Cást 1: Výlet pana Broucka do mesíce / Jednání 2: Tanec. Tatrmane!
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc97f911a1508d261d4d74c2c85ea78345b99221c4e7064f99f694f9c59822eb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN960730909.
Výlety pana Broucka - edited by Jiri Zahrádka / Cást 1: Výlet pana Broucka do mesíce / Jednání 1: Hubo nevymáchaná!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e7886420b2987f85cac397b59792b115291a20d9f733a55eb86e6abcb128b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEN960730903.
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
Výlety pana Broucka - edited by Jiri Zahrádka / Cást 1: Výlet pana Broucka do mesíce / Jednání 2: Úvod. Tuto melodii, ale do bombardonu!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63910625b5e0cb01de3cbc860dfd4dd870afd157b8b7597de3841d65382059. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEN960730908.
Výlety pana Broucka - edited by Jiri Zahrádka / Cást 1: Výlet pana Broucka do mesíce / Jednání 2: Mezihra - Cupriny tvé stale vence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6358a20fb4da089cc936ef13932099e4e09d783bb79e653b30ef4f76a6be7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN960730913.
Výlety pana Broucka - edited by Jiri Zahrádka / Cast 2: Výlet pana Broucka do XV. století / Jednání 3: Byly podzemní chodby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06640668e64e67ed0040007c81a4efaa43750f728a5ca44830319057c06ceb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN960730915.
Výlety pana Broucka - edited by Jiri Zahrádka / Cast 2: Výlet pana Broucka do XV. století / Jednání 3: Jsi-li dobrý, stuoj!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55732a0ad980347268133c2ffd65f69214433fc8361eb9c9344c10302299bb9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN960730917.