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 0x150aa1c4fe78d5a3b4e036f39fa528e07279c48f145a7330b434b941f224b14c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a030d95-10fa-4d7e-b90a-d74053d0ef31.json and https://artists.proofprofile.net/proofs/artist/6a030d95-10fa-4d7e-b90a-d74053d0ef31.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 0xfd25852a74d2254b1248674efb515122e81996170fa0542b57412fa7846083d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMPU51272325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b732dac910a63f1dda9008e9329198b0aedf2255315a397abe390e97ac48eaa. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMPU51272301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7b6f45f4c5358dde3f67c01d1b4936d9fee530d62cb9e76bf969800f6e5ea7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMPU51272313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc86c7efb4d90a916666e95b243db3ea03be4c8435a523396b7d2ed010c1a717. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMPU51272338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3f5f8145814de7ffe9d43f7d36830054c942a1af2514e23e51cc2845a59223. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMPU51272307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291592688353899b690d16fa1138de30418606a44f7ea497299e390832475183. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMPU51272334.
Мастер и Маргарита (Музыка к кинофильму "Мастер и Маргарита")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2655017c5aa306fbf99dc2e3975486ffbd976c1ecc34fc5789b08a4abf2f92. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPU51260758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe03f4c85d341f0a97fba51e48743bd366ed80a1c77a3f41d6c1a6c03fdbbae. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMPU51260759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d332ebef937283a97960a81c28b0fe84054500ad36413fc05f870b4a4e7d83. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPU51260760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af2380284897b4aa913cba00dc33fc403207a5ab5d28c8d6229821a4cb16a30. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPU51260761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03df85c79f0fb04b9e0c073aed583d7f346853622688dbb254e329804d6f207. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMPU51260762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1efc154f6f63e04ce681812211f4454f80d406424241fa9774b7a623fc887. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMPU51260764.
"Любовь выскочила..., как убийца в переулке"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19572f1a2069dd01017a245aec152a1d61604c10278262c464529c21bc54034a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMPU51260766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7275d1bd608ca96ff531eef601c8afe1453ce46e90ab1207b230a700871438d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMPU51260769.
Игорь Корнелюк. Песни из кино. Избранное
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473523e28340180cd21c36cac924eced36b0b4a724154c773a99a87da21a0b36. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMPU51260751.
Тарас Бульба (Музыка к кинофильму "Тарас Бульба")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b254c3ebbcf3885591dd25450dd9f6894c0eb6733f6ca328116a81f528df369. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QMPU51272309.