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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5c4d8cd1ae4688309e376321d50dfa14804d65ceea85439667c9b35dd8626e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f75bcf-256e-42a9-b9a7-48d6931d2796.json and https://artists.proofprofile.net/proofs/artist/f4f75bcf-256e-42a9-b9a7-48d6931d2796.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af67724db456a3c4441f1c3435fb7be2bcb16c78a18fa44ddfb6030f53d6a3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PLA162397901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ccc4b3ad28dc2d27e9bf7c689538e67b4a9b588319c9d457f2008ed8dfd52f. 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/PLA162397902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384f06fdb5c9d662abf054f0d6f7badb1cc006cb22624f0f275027c1fb999c6. 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/PLA162397903.
Bogoroditse Devo (from All-Night Vigil, Op. 37)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3d7a5cea8dfcfe09e088d974f77d6bb5f175f9f6cd07cf36036e8541f73d0. 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/PLA162397904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9d1a6d0c329b1f7c234b50f40eebff637080dac42f3d0b1f5c8012913acf8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA162397905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a69463e5f07155fbd188e58bcfa494f472ffe7ed5517cbe71d0cc688643f7c0. 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/PLA162397906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf465df6730b7e7ab7b523769ca84552647aedef02a092f11c640e37ff2f8a14e. 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/PLA162397907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061d674118c00dc6073711c617002b481138611b3c721a74b21bf799e2b39ce6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLA162397908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9247e25ad35a5674996f26212685d00b26761fa201adf63c22bf08c425480ffe. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/PLA162397909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57c72be51fedc96c0df6fb54324e1810de2aa2663574832ecf6a28990778f56. 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/PLA162397910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ade47c0cd292ea988f91ed03666e79fc86dde34438ec12688bf5a2a8f975e3. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/PLA162397911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a4472667241e49e48e596d6ef5eb2d23aad474ff21e2aeacaef5bf77a26925. 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/PLA162397912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aaeb58151905be7aeaf4337a1addcdb1df4b152f5c6fadb630488594f3b82f. 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/PLA162397913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d969d056e9e72575d3e7ec23aa2b324fd0ab808f5c2ccae1de88e0a3df338a5. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/PLA162397914.
Glory... Only Begotten Son, Op. 9 No. 2 (Слава…Единородный Сыне)