David or Dave Martin may refer to: Entertainment David Martin (artist) (1737–1797), Scottish painter and engraver David Stone Martin (1913–1992), American artist David Martin (poet) (1915–1997), Hung
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 0xbf8c3f1675c82702f07103a987b3333cddabc3e51b8fe4f496eda97d3c3c5b6e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5cb38f8-5274-493b-9081-3b08cc86f21e.json and https://artists.proofprofile.net/proofs/artist/d5cb38f8-5274-493b-9081-3b08cc86f21e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Simply Heavenly (Original London Cast Recording)
Supernatural Life Coaching (100 Key Points)
CANTARA EL ALMA: Sebastián de Vivanco y la música sagrada en el Siglo de Oro
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 0xa5d22cd89b62c4f38027ac115b8c81a33bb744424c222403e3028323a4643985. 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/US6XX2280101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecf357e6d27590c4136b5d83aaac39d0a227bc5546602e77a8c3f7d9874ee1f. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/US6XX2280102.
Salve Sancta Parens (Introito. Canto llano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c7223e21acbf070894395777d6ee4fa33732c9ffaecd3602f277965b74eb5b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US6XX2280103.
Missa Beata Maria Virgine in sabatho, a 4vv: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b9adbec6766fb962a47a125848189f0f8da26c1733ce5b72c51e9f59d01359. 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/US6XX2280104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6a4dd817e3889b55d3cf7aab05c8b484c262a6954520dca1ac1f272f9dd5a1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US6XX2280105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b62f7f4bf8fe5238714c820cbdb8c1b9a797f022ae4cb8e6a4fedee000dd604. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6XX2280106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf00847c33d13cf931bb5da6255209e3fac405e758aed17daa376481531aa08f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US6XX2280113.