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 0x9dd4852386179c28346585b67d9ccedbc87063250f49e0bbf6fbd6983f2798cb. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41e5605a-50d9-4068-be82-c8b958489f7a.json and https://artists.proofprofile.net/proofs/artist/41e5605a-50d9-4068-be82-c8b958489f7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelenka: Melodrama de Sancto Wenceslao. Music from 18th Century Prague
Sub olea pacis, ZWV 175: Symphonia. Allegro. assai
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 0xafe606018002999b917985d1491f2f5c264b9a46fe3836028c3e5f0cc72c38b1. 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/CZA160101013.
Zelenka: Sub olea pacis et palma virtutis
Sub olea pacis et palma virtutis conspicua orbi regia Bohemiae Corona, ZWV 175: No. 1, Symphonia. Allegro assai
A. V. Michna z Otradovic: Vánoční hudba - výběr z kancionálů
Dell' Amore e Dela Morte / O lásce a smrti
Czech Folk Songs: Hushabye, My Little Angel /Childhood/ (I., Page 23)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3545d731cdcaf2f66e1bbced8674813f3f3857f3067a9786c25bd534e700c0. 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/CZA169501520.
Czech Folk Songs: Oh Acorn, Acorn /Lovesickness/ (II., Page 300)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b947430102723496ba7723e57454093a13f82f149d1aeb559544bc34003ef. 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/CZA169516520.
Zelenka: Requiem and Miserere (Ensemble Baroque 1994)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d4d295cc5295597fc8d890d606f8efafff46c0455054ea49f6890233531bf5. 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/CZA169500243.
Moravske Dvojzpevy, Op. 32: No. 8, Skromná
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07c2f03b319211fa399160ae17c3ec4243dfc3ebe52f604e1a7cf150249635. 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/USCGJ1787663.
Moravske Dvojzpevy, Op. 32: No. 1, A Já Ti Uplynu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ea7930f9059d9cca6ee5ebbb7d3c6b7c9dd5fec3a03164398d9fb65322ca5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCGJ1787656.
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
Moravske Dvojzpevy, Op. 32: No. 3, Dyby Byla Kosa Nabróšená
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8124520b5af66073955413c0a39ff8aba4f610f706541f9d44edcf87bd2a962. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGJ1787658.
Moravske Dvojzpevy, Op. 32: No. 4, V Dobrým Sme Se Sešli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9238d329b4ff95d9ff0bd8adae64e7b6780baedf704750f63957b7e17cb2baaa. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USCGJ1787659.
Moravske Dvojzpevy, Op. 32: No. 5, Slavíkovský Polečko Malý
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a120f33c332f355100d1ac9bcb5c827be3100e349f13b34eab6a617bdf50f3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGJ1787660.
Moravske Dvojzpevy, Op. 32: No. 6, Holub Na Javoře
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8e2a73464fcd944a48aed097685f0cf727081f6ded66ae40d2216306dde09a. 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/USCGJ1787661.
Moravske Dvojzpevy, Op. 32: No. 11, Zajatá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c31467a76ffef0e5d84baeef29d9eac97ecba850195a1109a713cec63591a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGJ1787666.
Moravske Dvojzpevy, Op. 32: No. 13, Šípek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44435ea370f7d45723512a9a73fe1e3b4ef33d260eed6f450149cfc32283dd5a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGJ1787668.
A. V. Michna Z Otradovic: Christmas Music