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 0xa1e70ed129793fa8c54d40ae87d3ffe91b9803ad118a6b02e19fc26401b5c8a5. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c2c3284-a536-424a-a2c2-608b09572f54.json and https://artists.proofprofile.net/proofs/artist/0c2c3284-a536-424a-a2c2-608b09572f54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Česká vánoční hudba: Kaprálová, Feld, Krejčí
Každý jen tu svou: Adam Plachetka & Kateřina Kněžíková
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 0xa1b5c3a9c54348ee6991e4e2b3e61b6ddf81aa96965ec62ebde67a4138c10ec5. 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/CZD941800591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d499bac400d86b68dd137b580c04a805d91e923b51497332274df879f4823b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZD941800592.
Česká mše vánoční: I. Kyrie, "Hej, mistře, vstaň bystře“
J. J. Ryba: Česká mše Vánoční "Rybovka" (Bonus: Brixi, Habermann, Laube)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c828f489d984137234c443b29fc4a983183b837d1cd61c4d8608f9d1b28e7. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CZD941865519.
Česká mše vánoční, II: Gloria, "Sláva budiž Bohu velikému"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae01debd61b92ac339517b015da7027d5f72edddb44bfbfc9fd7ece75b83aecb. 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/CZD941865520.
Česká mše vánoční, III: Graduale, "Vzhůru, bratři, jenom čerstvě vstávejte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec68bcd79d97e292fe25fc285ba0b2dd9a534f982e217768a414e861c35702f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CZD941865521.
Česká mše vánoční, IV: Credo, "Pospíchejme k Betlému, k místu svatému"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f086708ba18cb803670af4e6577cf513b421ebbd362a05ae7780739319d3234. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CZD941865522.
Česká mše vánoční, V: Offertorium, "V pokoře poklekněme"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c48367db13ce4c4bd1503c525ac0bea3c64e5b2e30fd64710402284d7af6c4e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CZD941865523.
Česká mše vánoční, VI: Sanctus, "Nebe hlásej 'Svatý'"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c5e5b845520c3719d534390dfff338727492592939781682bc1ea1ffd3623b. 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/CZD941865524.
Česká mše vánoční, VII: Benedictus, "Pane země i nebe, my zde chválíme Tebe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85885a3cbc727707594bf8975a94966193454ee7e043567ab3b07d00ea383edf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CZD941865525.