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 0x6a15f5813984202d2d02503ec9f5c8f2a979a572c594ae3580b483c64f1a9271. 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/27811f33-5d88-4e0d-b359-c6206e9fb4a9.json and https://artists.proofprofile.net/proofs/artist/27811f33-5d88-4e0d-b359-c6206e9fb4a9.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 0xab39e3144324c0b3296612bb7f6dd0efe41b7654898b16eb635da5b5167013dc. 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/RUA1D1802152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ca33e50ccd4e00caa9f40be2602a1c0f58b8186d46d90c522627b2dd7ee12. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMPU51632923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc0d8f5b6048e12144517d2ea688621f4f44089e017cb182459aa6947b8f95d. 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/QMPU51632919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2a95132a2926c51b55406db9dfbe5fbbf19381ade05d731118609c36791e9a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QMPU51632921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161a843c0a0ad8f3d6b828eb8f7f95c433bcce4139f9fcff00e2d7cf79fba5c3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QMPU51632902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f85e841d2b8f0a015e6f6f48003a1611d74628b4994df0bbe9b714bee85486. 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/QMPU51632905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b2bba87ea9dfb31673e7513291a0d4fb32bcc93c19aa12f3a712db95247f47. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMPU51632726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430e75f48b98a2f20003c7e61b07f7e41a91fd57db28cf0404a0c36aca744fd. 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/RUA1D1700242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca36e88eaf34ffb5dd72dc254f5f50c8ebcc244e141e8382df1d74d8b9dc50ca. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SMRUS0067058.
Электроакустика, Часть 1 (LIVE. Москва. 2021)
Электроакустика, Часть 2 (LIVE. Санкт-Петербург. 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba8e350baf4df6bc095917a7432e540cb5860ff33bb8d3cbfdef94ee0498b9d. 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/SMRUS0071212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64d5c2278026be61f76c2a10377d582310b55bc4c0ac24d260cee5e1f1364a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SMRUS0073615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14b872fb9a837e1b25f9a2a8581d9ad00e2ed149e779261c38332cf9fc7a9bc. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/SMRUS0074341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906c2f00ae1e7ca9436772e9f6f2e6c20116d64cbf4e60133474b40a419f5a63. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1D2524517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6bf167c47463442003246dc433bdb885e7562cb6034a89bf3d9d932edc521. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUA1D2524518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600db6a90f18b2f0955d2002a4e8eed705697728df0cc68e3e35f49828d13c2. 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/RUA1D2524519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406911933cedc06302d7e4b536a6b7dc51574a79876ea9a0327e09d08b85d208. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/RUA582002491.