David Leonard may refer to: David Leonard (record producer), audio producer David Leonard (cricketer) (born 1965), New Zealand cricketer David Leonard (singer), a Christian musician in the band All S
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 0x6fb2dbf66dbc802a33bc9634f3471ee1d7835c65f74467a83fcde7a0dc519bf2. 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/8c8c353b-c6f9-43f9-b912-3e956f35c178.json and https://artists.proofprofile.net/proofs/artist/8c8c353b-c6f9-43f9-b912-3e956f35c178.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 0x2c9e13c3647759797cfacee7a862d855f03ebdd4a7a0a10ccbaa3965100d0e03. 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/US25L1800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9918372e4dd91e765216a2401d2a97acede11546dd5228f98713cc2b3d0dcb52. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US25L1800541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d44f204c477102c5453b460c35141b64441d1a0a7286c6e6548874ba8df1e4. 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/US25L1800538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d76cc1b995ba4be592af4ff41480d8ac8fbd02c93094ad2c275ba084a636d4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US25L1800539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e13c3647759797cfacee7a862d855f03ebdd4a7a0a10ccbaa3965100d0e03. 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/US25L1800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde0c28374e35827c8804ba0823e46801fe5153b59e0faaa496cb62f1f17b79f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:29Z), 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/US25L1800546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb747a98ca1f7db3e57877aff79f1f21c27e1929c635320e8d8ff74086bb6a. 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/US25L1800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09912135a5578d6a22de522f20cba89f5b22329edbc303d297dda9cc8a24119. 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/US25L1900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad92f54c0696e3f81c2f898b290271a101288edb4d60b2f7d535574bd0d217f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/US25L1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1fdbcdfdb62267056bc28351972bd26857de7bfa0aaa6a77de0181a2626b5e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US25L2000143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3ec4db654ee0d9ac81d84f64fd7b8d2f7c327bf393833dbaafbfcd53d9ae3. 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/US25L2000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea11c0940912eecf7d825e395fa9c24449c683009102894c20df7592e7ab4926. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA5W2100424.
Every Hour (feat. Josh Baldwin) [Acoustic]
Every Hour (feat. Josh Baldwin) - Acoustic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea75b3bac8b7aafe99bef28edab84df07f65edb3425074f9fcaf0e6569c5d3. 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/USA5W2200583.
Light A Fire / Great Are You Lord (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d50d113e946e36b70e93bbf5f104a81624a1df0b64e3c3ec47d9806cb3f9145. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USA5W2200747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e806426105a7c60eb9658ec5744020f7ed3ffda83361d4debe139cc2197d904. 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/USA5W2100426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a931d717d6c8f5abacb7d3515652bcfe962b14a8f891d77962ce1c5c292259. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA5W2100427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63595e9f3987c405582c6687b2deaca4b99f95415242d4651edbc4f2c56f2a6c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA5W2100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea75b3bac8b7aafe99bef28edab84df07f65edb3425074f9fcaf0e6569c5d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA5W2200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa52645a56ce557d2240dfca3b78ce91b050c891173c656056ef9eabd53ea81. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:58Z), 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/USA5W2200881.
Light a Fire / Great Are You Lord - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a20eed4bedec2dd543681b9b65d613d5c1dc29d4c30cb0eaffb1e6470c2f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA5W2200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab82f94d27787f373772f4b604cf5e7b3c71dda4bb7851a113b7c377fbf92ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA5W2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facc9200bf95511d4adc1b27f93df6687091f23d5a74bc99e5274d0326b88ee. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USA5W2300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486b90447065e821df5a6e1485b617196f65a9c3e8ec66d332ed7781c2a62a5f. 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/USA5W2400276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ff3d79e8ea6a02de5b6db040ca250b985a6e705cc0c88ed1596ab11440ab05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US25L1600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748e169af4fc00640105b04f31346f8f7cffbc817b191c642368bde8c8963ef. 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/US25L1600732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a231f23b92e1b0a1264c72da2f855908310b32ff271ce7d46581b2e9844b329. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L1600733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee22cbe8564383f9ee9999a009b87910b231b3661ae89c67c6a07a2d29988e2. 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/US25L1600730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947711235a240c95c0d8b8891d83a39862288927408b228fe93d6506b79803f1. 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/US25L1600725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57379dc9533ecf07142a7fa1e557795d22b9a47c4902a8da56a91ccfa0ab06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US25L1600728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639945a3d38340bb697bd38f57d178985004693cb75c0321e2fd2e3dc97f73a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US25L1600729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7509a9117b829627435d44a2847f757409d3cc3578192451a8dd449283c486cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L1600734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a5096ddf039d20c58ffc04456a2a481621a7980c5e6f44efe4738c516118b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US25L1600727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd30b29b29cf3575d0f845e02ab7a1fe6fdc2889c7b498e8d5fd3fe2f4aa630. 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/US25L1600731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae199deb782f1f64f87e42d5ddd1bd32cc3853816e74699d3d1d3870509869cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWFE1990612.