David Mann may refer to: Entertainment David Mann (actor) (born 1966), American stage actor David Mann (artist) (1940–2004), American artist of the custom motorcycle subculture David Mann (songwriter
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 0x478c0b12594cc419214ae70d932b921d78286bbe9619d1700fddae75a0eb6869. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dce4041-a4a7-41f3-a537-073eeca2bdfe.json and https://artists.proofprofile.net/proofs/artist/2dce4041-a4a7-41f3-a537-073eeca2bdfe.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 0x1689ce0ced0354f5361290d627215b5c282769378c2a4c23f071ab4f9cfd3bd9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USACX1000605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d95df324cfb3220be6e89c659547193211a66894dbf041fc9b4ff3d5ea0a9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ4391600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d95df324cfb3220be6e89c659547193211a66894dbf041fc9b4ff3d5ea0a9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZ4391600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0330a0aa99b3074a351e5d82a82873fdb8ad005ba3ce4bbf2a373a964ad5e9d5. 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/QZ4391600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28f14b822d22b2e3788b9f2d32a1fec970ad5836d434b785b85315d06237e3b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ4391600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c78c6ec47e7fadd3bf2ae23071a4654f918548066c88163daabcdedfdb3d41. 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/QZ4391600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b0a3533700e3098f69efa1c2891d076daf4fd3c33499025f36e5e0040b381. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ4391600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eb27f093a89901779b1db4182c102bfd3985f3fa80dfd352c8d0a7de45ed63. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ4391600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef24b85b857419bb489deac1fc3ba420f762bbe7c4987f7978b01e016ad67dd. 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/QZ4391600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31dea5ee42d94c6a51db096fd83869265f7828f8aa338652874a98723587bf. 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/QZ4391600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c41820ac43ee01c1c7333ccbc2c96660c49b799795cd6a56e62ddfb533878e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLE422303513.
When I Look In Your Eyes (feat. Nate Smith, Marcus Strickland, Adam Rogers, Alex Acuña, Terell Stafford, David Mann & Marshall Gilkes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d835857724d141c389e9e8e5df69478ec552d1640aa627237460b250421fa3b. 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/USLD91736903.
I'll Be Seeing You (feat. Nate Smith, Chris Potter, Adam Rogers, Chico Pinheiro & David Mann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e79c07a047fea3ae2a684b77f848644a2416df8cbc603cf0c1c01e5a542c10. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USLD91736907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ee538002f2c9af4b822c0185026a2201cdf00691fa924a89fff6cf4c0c164e. 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/GBKRR1500610.