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 0x69cd86440dc02e2176564c9cc342b1cfc27fe7cf7d169457daab46195979e6d8. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bb90cb7-4766-4ce9-963e-cb76b050c4e3.json and https://artists.proofprofile.net/proofs/artist/1bb90cb7-4766-4ce9-963e-cb76b050c4e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Česká mše vánoční: 1. Kyrie - Hej mistře...
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 0x6b36241090ced25869b0432902c3661bfe74bb93591ca36af03a5992ccae09e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZUM71700377.
Česká mše vánoční: 2. Gloria - Sláva budiž...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d31d015be7d5847d0ad94a0f0be93ff6d1b7f7123df352c9695849a7593e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CZUM71700375.
Česká mše vánoční: 3. Graduale - Vzhůru bratři...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f7d14bae89fd656067b1639f409d744c6f050dfe2ca3666c6d9c621faf2ab. 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/CZUM71700376.
Česká mše vánoční: 4. Credo - Pospíchejme k Betlému...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76368eea569725c97c406a7af1a43a2801467917da8f1789499f326bc3d56e4. 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/CZUM71700374.
Česká mše vánoční: 5. Offertorium - V pokoře poklekněme...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a2ec6016197fdb559a6160bf312a425582fb84ad1c08065f4a7572b0e796d4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CZUM71700378.
Česká mše vánoční: 6. Sanctus - Nebe hlásej svatý...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57177638d3799e1ed618e291924e036bfe759d1164aec9a6fdee0672512042a5. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/CZUM71700379.
Česká mše vánoční: 7. Benedictus - Pane země i nebe...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b9be812b2b793b1f631b425ae8365d807f0fc9c5a57a6f1240b9d576589d1e. 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/CZUM71700372.
Česká mše vánoční: 8. Agnus Dei - Nyní se do Tvé ochrany...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c99295f26d7cafb613f620a7942f0b00439e2e8484e573dafb4cf30dab6dd7b. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CZUM71700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79894d7826106cbc2ed418da06f636fe3a95ba9e573d10f8a3a5d2ed05090269. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CZUM71700373.