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 0x915be0848c0d7289af174020014ba86df464fee2bf79bcbef874ca08fc434e89. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00b099c2-c0ae-4e76-a4b2-c2257acc0ef5.json and https://artists.proofprofile.net/proofs/artist/00b099c2-c0ae-4e76-a4b2-c2257acc0ef5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass in B-Flat Major, Hob. XXII:12 "Theresa Mass": VI. Agnus Dei
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 0xa1108ca5cf824399ea097e7a296b30ac4de23d3ce9e977ddfe79709159514566. 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/USSM19604729.
Mass in D Minor, Hob. XXII:11 "Nelsonmesse": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16616f980ffabc2e8bf4e4340036e09866e4d7230066ee87d3be12c4551599f0. 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/USSM19604718.
Mass in B-Flat Major, Hob. XXII:12 "Theresa Mass": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7990a5fe725881c88ab23918330d50410571142de6ff0a2a74fb752d247c815. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USSM19604724.
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 in B-Flat Major, Hob. XXII:12 "Theresa Mass": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1033f11fa771fbe9ac9ec63fb9b2934a9afb2505bcb47d46169908d70757f4e2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM19604725.
Mass in B-Flat Major, Hob. XXII:12 "Theresa Mass": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792f5c7a0f71ba3e78ed94d4e4e8b770240819af887f86d7348b77e5787ecb7b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM19604726.
Mass in B-Flat Major, Hob. XXII:12 "Theresa Mass": IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634fb648f851222394758aab0f69b39a951c03bb63957b564619a4305bfe9754. 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/USSM19604727.
Mass in B-Flat Major, Hob. XXII:12 "Theresa Mass": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568177466185140af2cc98c6fe4caecf647b0b465ec0e0dc5e9ea05b60db92b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USSM19604728.
Mass in D Minor, Hob. XXII:11 "Nelsonmesse": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312272fe62235a3a9efe3cc4b7a749f9b9fc1c80ef51cd6ca69334fbefc6497f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM19604719.
Mass in D Minor, Hob. XXII:11 "Nelsonmesse": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fe34c370f08652652ed3da1b13ebe3b8d19973523c795a147de686f6f47633. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM19604722.