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 0x96bc11a33d8f753d4d9452b002cf358cdef0e093f86b59ec78416545947752c3. 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/47203eee-fd15-49a3-b592-fb367ce784f5.json and https://artists.proofprofile.net/proofs/artist/47203eee-fd15-49a3-b592-fb367ce784f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Česká mše vánoční, II: Gloria, "Sláva budiž Bohu velikému"
J. J. Ryba: Česká mše Vánoční "Rybovka" (Bonus: Brixi, Habermann, Laube)
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 0xae01debd61b92ac339517b015da7027d5f72edddb44bfbfc9fd7ece75b83aecb. 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/CZD941865520.
Česká mše vánoční, VIII: Agnus Dei, "Nyní se do Tvé ochrany poroučíme"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953a911d878d74027661f581df4d9d210159e32a4b601f7846abc1ec99ec2638. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZD941865526.
Česká mše vánoční: I. Kyrie, "Hej, mistře, vstaň bystře“
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.
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
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.
Česká mše vánoční, IX: Chorus: Závěr, "S radostí, s plesáním, s veselostí"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8309595f7cfc2faa05f655d2d1e89f9bb63c91c812995bc2998f8f697ddd217. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CZD941865527.