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 0xb065ca0097b1ad8dba0dc1e8a53ee1bb8b4045f260dd566a7435cc293c169333. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4ccd6a2-626a-4fc1-ac11-6d63718640a2.json and https://artists.proofprofile.net/proofs/artist/d4ccd6a2-626a-4fc1-ac11-6d63718640a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vespers, Op. 37: V. "Nyne otpushchayeshi"
Rachmaninov: Vespers & Liturgy of St. John Chrysostom
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 0x6fa8a1e4d7470f219cd6c3b0121030fead9fb298ae264811f911c0adffae0428. 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/NLA509306405.
Razboinika (The Wise Thief), Op. 40, No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca433e28727ff08bb2c65146d4a328e3837a91a81610739f996aaaa5640fe5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLA509506404.
Amin'. Khristos voskrese iz mertvïkh (The Paschal Hours)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a5ad588ee11e0210372a9699f4196f4ecab796b0a57eb0ce8b97f75cbb5a7d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLA509506407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa8a1e4d7470f219cd6c3b0121030fead9fb298ae264811f911c0adffae0428. 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/NLA509306405.
Rachmaninov: Vespers (All-Night Vigil), Op.37
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa8a1e4d7470f219cd6c3b0121030fead9fb298ae264811f911c0adffae0428. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLA509306405.
Dnes' vsyakaya tvar' (Today all creation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ed45e66fd04eead739a8af92fa775c1418ccb08ba3e7323c1335821d63cc2f. 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/NLA509506409.
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
Priidite vospoim, lyudie (Come, o people)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6e2ab1f83b517da843172b028aaec748f5abf03559dd79236b20c3f767b25. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLA509506410.