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 0x34ee495c2f5e2cc12352104ad600dab859ec017c1793d858d60989f85c0c392b. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4991de8d-63de-4b95-84f7-8a8a0fdf821c.json and https://artists.proofprofile.net/proofs/artist/4991de8d-63de-4b95-84f7-8a8a0fdf821c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass No. 4 in C Major, Op. 48, D. 452: Kyrie
Schubert, F.: Masses Nos. 2 and 4 / Deutsche Messe
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 0x00a4a07a8af7d5cb9478cf327ee9d518e4a1d54090bf6e99670ff71ba5b98d5a. 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/HKI190891701.
Mass No. 4 in C Major, Op. 48, D. 452: Credo: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb248c0a94b58b06cde329f8dcd61da1c598c2602b585451244bd2aae17454c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/HKI190891703.
Mass No. 4 in C Major, Op. 48, D. 452: Credo: Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a41f2fc6f4ad76c488f3b157c1b8aacb0b6b260df7bdd9d1e1c4f949495c032. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI190891704.
Mass No. 4 in C Major, Op. 48, D. 452: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1286cba325f3eaac9ea1df161ae72ce577423fe60e72c008cb19a27298af09bb. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/HKI190891708.
Mass No. 4 in C Major, Op. 48, D. 452: Agnus Dei: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124ce7399bba31232c90e1eb90e1fa385bfca2b8b70b9eb23c01e05059ad107. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI190891709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4734511708e4a3b111270c3e1088e20670c10347eb520d1d1b7e5ec13e6b7907. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI190891711.
Mass No. 2 in G Major, D. 167: Gloria: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0805ade7e740c9e6c950e763e24c00fd862707792109edc7d15a639f0299c837. 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/HKI190891712.
Mass No. 2 in G Major, D. 167: Credo: Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad498b3f74ccb6b70792c56d681f490a0c2be77681f3acb31ee749fb3417839. 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/HKI190891714.
Mass No. 2 in G Major, D. 167: Sanctus: Osanna in excelsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f681ba77ceb797572e2672f10a57616c2daff0bdf78f07cdd7f335556c3a82. 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/HKI190891716.
Mass No. 4 in C Major, Op. 48, D. 452: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5988946f51c1d0d9c77240bc814a3b6448393ce328f61dddcb6c6caee7129e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI190891702.
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
Mass No. 4 in C Major, Op. 48, D. 452: Credo: Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b5c31dee587700fd712705c438dbc2b4acdd090d13ad45f285a1ae61e0f24c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI190891705.
Mass No. 4 in C Major, Op. 48, D. 452: Sanctus: Sanctus, sanctus, sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f955dccc919b40b3a4510bcaaf838a2da79cad5ebf8f7fd03b729434cf3bbdc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI190891706.
Mass No. 4 in C Major, Op. 48, D. 452: Sanctus: Osanna in excelsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe575382810c6b12ceaf43306710cb69860e254aa1a76fefaaf059bb8ccc4fa19. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKI190891707.
Mass No. 4 in C Major, Op. 48, D. 452: Agnus Dei: Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af51dc3ce6a8d935e042de05fbf5d31aefac5660dcb19219cbd1da7c8c2938. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI190891710.
Mass No. 2 in G Major, D. 167: Gloria: Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86b610df3ea6710fe62543b964a35088f60b287586295314c1f32f7b07b1df. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/HKI190891713.
Mass No. 2 in G Major, D. 167: Sanctus: Sanctus, sanctus, sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74f419c187c05032000de0b535220bdad40e4846eeee3d201f88b9882463f03. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HKI190891715.
Mass No. 2 in G Major, D. 167: Benedictus: Benedictus qui venit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc56b2d947a4719091980a778030c6d62e7757ce00ae56e87447c45f0c8d62f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKI190891717.