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 0x1dacdba63f115191dbb22a013658c07d12b5918229e7b096b889832952becf13. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f2cb5aa-e8df-44e4-9b7d-29564b88c733.json and https://artists.proofprofile.net/proofs/artist/0f2cb5aa-e8df-44e4-9b7d-29564b88c733.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass No. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": 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 0xe1f07a21ec3c941db54cf9aef5b023f5264c70aceb50cd896d6db34adcd9adfb. 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/DEAD61104906.
Mass No. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6f36ae4868a09b77cefcb2386a6a40c4b9a7ec59681b74422e695fe7b0a61d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEAD61104901.
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. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589770413a07968df91e9915738ce7a0c099cb9a517fc23dd8932707e4ca4ba7. 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/DEAD61104902.
Mass No. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea623e38dfc59182df7efe97a84b44d4f76cd292cce3ac7042c0513fdfac5a0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEAD61104903.
Mass No. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf623f1c7aa4e76445b2ff9d4540ee8ad509dfabf1e92a8148e75738271dbf340. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEAD61104904.
Mass No. 14 in B-Flat Major, Hob.XXII:14, "Harmoniemesse": Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0c21da20a837107a002b55688e145f84cad953c3fdd71a37434d089c62a183. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEAD61104905.