Duvall may refer to: Bands Duvall, a pop/rock band signed to Asian Man Records Places United States Duvall, Ohio, an unincorporated community Duvall, Washington, a city Duvall, Wisconsin, an uni
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 0xbc46f9a1026784332979254c25514304616984144de4e765351a8040c0aa417d. 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/b7c92f00-1b1c-4411-92a4-b17db5a9ed63.json and https://artists.proofprofile.net/proofs/artist/b7c92f00-1b1c-4411-92a4-b17db5a9ed63.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 0xa5df0348d7d51a0aecdf981548d0f177d2769b787ecb5235da3ce0ab59a05de0. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLF712103367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df0348d7d51a0aecdf981548d0f177d2769b787ecb5235da3ce0ab59a05de0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLF712103367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949dfc3ec0b0b235fa5c0c5fdfbb0f9222c436d8d0e427b4cf6b08cc77eea89c. 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/NLF712200344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db44f5972e3c38a5eba334de7d9e48b47a7b59899a4a26f147c73ffbe3daad. 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/NLF712303690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb0dcd2ec0c0332f23948b17c595eed219859a95a33528c4d7b43d662b3bf1e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSXS2300116.
My Heart's Been Waiting for You (feat. Duvall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf1d7a3266488dec349a57f08e47b0ccad70970d3c16bca2b0b0b79e0569a67. 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/GB5KW2104370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11efcbdb969874216370d6ddd44f11591efdebd52b12092bfe9da2b23e754fcf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLF712200343.
Armada Music presents Summer Hits 2021 (Mini Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fc890144b911d7ffa190eef5b707f6ee7cca21dc60cc58c19d2c5ebecd7cb2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLF712106959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5df0348d7d51a0aecdf981548d0f177d2769b787ecb5235da3ce0ab59a05de0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLF712103367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e691d17f231a977826784493e3608ef43e2e2de86c1a880d15ddb73eba40f. 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/NLF712209612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e83550983433083cdb30e407a542edebe9d12b2fca2b7a597182d2b26cc064. 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/NLS242300122.
Ladada (Mes Derniers Mots) - Duvall Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9576e88d94ff28990436f21d5341d91693d682b219fa728a65464f96035009. 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/NLS242300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9576e88d94ff28990436f21d5341d91693d682b219fa728a65464f96035009. 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/NLS242300128.