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 0x39af5d5da036193422c2d9906f3cfb82a693e86504e20fba1690d2cd79d0137b. 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/a8954107-b5e4-4161-a9d7-60fedaef369b.json and https://artists.proofprofile.net/proofs/artist/a8954107-b5e4-4161-a9d7-60fedaef369b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Czech Christmas Mass, "Hail, Master!": Sanctus
Ryba: Czech Christmas Mass / Missa Pastoralis
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 0x06ae4b3faa31d8daff75dcf65a781d6c84eae746cfdd62e9a197de416ead9e4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199824206.
Czech Christmas Mass, "Hail, Master!": Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d9190c772c7fa156e31d9a0d7245d71bd22d2053c83e4dab13d80523ef642d. 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/HKI199824201.
Czech Christmas Mass, "Hail, Master!": Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051dcd11ac9e8ffe9ffeb08002e5ae1b3ff9e05fbf0215e17a3eb6074f869d95. 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/HKI199824202.
Czech Christmas Mass, "Hail, Master!": Graduale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81177c784c8128a2a5be2d89769306c97e29d124e5c49042bd1ae5eb99be80e6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI199824203.
Czech Christmas Mass, "Hail, Master!": Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f337f147ec9c7250a722b3d9272d3b96277f21e06c85b92b77f1f711756dc3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI199824208.
Czech Christmas Mass, "Hail, Master!": Zaver (Final Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c9d8322a4bcfdfbcda5d513e592013be395cded3973156abcb7b43b806bf94. 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/HKI199824209.
Czech Christmas Mass, "Hail, Master!": Offertorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a3491199cd0e8fa360d1bce631a8722e64cc3d7fbd28f02ef4f7d1de6fc8da. 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/HKI199824205.
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
Czech Christmas Mass, "Hail, Master!": Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad46966ebc76666d15b3e06ba19c63ef74800a034e46304b1d5da1886675bd9. 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/HKI199824207.
Missa pastoralis bohemica, "Hej, mistre", (Hail, master!): Dona nobis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb5eadb5433c9b1740183786959fc7552bdd818f1233708908afda3d4469b72. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/HKI199824218.