thumb|alt=Image of Lincoln being shot by Booth while sitting in a theater booth.|Depiction of the assassination of Abraham Lincoln shown in the presidential booth of Ford's Theatre. From left to right
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 0x928f01e3917681a8d7181ce163fae8fa6baab30c2b60d82dcdf44c41dc073ffc. 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/3612b418-b812-4129-91b0-8eb19f9e85bf.json and https://artists.proofprofile.net/proofs/artist/3612b418-b812-4129-91b0-8eb19f9e85bf.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 0xe886d3ff21ac1ea0c6119c731dc001c987a7a5c694b48f9d777ab63af2cfb66c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAFX2114797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45897a274cfd7d03f1232bc722f15c36ad479f3535bba327b8bf868376a779e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAFX2114804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245efe819ad4674020ecb17ea01e81a3c1719ee66e4bb0c36d589681326cd65. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAFX2114807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd42736f4a96acc45afd88fe09e244436c54dbe7a84d08063896dfd5655257. 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/TCAFX2114808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb5b269e36e79e501af88c52d54ba8de215c99bf23b16f79ffe5980e2e9e6a2. 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/TCAFM2198506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbef4d61f854005f1e70df3b2f0d86ea8b0c55cd20dfa16d0140f238873ca19. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/TCAFM2198511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39edd057afd1a78b64a17f87ef9889b92b28ef114f33c9053fdf8f445309fb0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAFQ2124924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5157002715710e1dd90f4e6c6aded5dfc051884e8346d5691bd612cc664c18. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/TCAFQ2124935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce6bc94168ff9188448ecc113c70d892f1c2ea566d8777cc62811caf13de26d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAFN2125914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c49090a99078c91835c50b0cae232f238e080822e8cde643b574f7c7ca0a2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAFN2125917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a682a80f8bab332696d94eb0f47185660bebcf8b4e23d89f8506f19d8505ce. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/TCAFN2125924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026e2628544f59bbc0c7f73d1ea64f0aaaac7dee05ca951b6dbccc8894df6df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAFN2125925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc1cf1ce95729d773a5cd0ab1f378489c1642ba0321df31d6d88e89c3c3ab7. 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/TCAFN2125930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4f290d64571ffa5be02624d6d4bb5b096ab87e0d44b3f5b8a6a76a1eadc42. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAIW2437408.
Nihilist Satanic Devilish Acoustic Psychosophy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d381243687d1225e9f825ab3b73a4ed5b2b5eebd2ed7bd943652d9a1bbf49e. 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/TCAIW2437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576eb2029ea5fa503890268f12ec20fba26b9b49f6e394f2efdbe0777724adfe. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAIW2437445.