Filth or The Filth may refer to: Common uses Dirt, unclean matter Police officer, a pejorative in British slang Arts, entertainment, and media Films Filth (film), a 2013 film based on the novel
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 0xbb640a4deec828926082ce215faf5d6200bea27f4035d8cea1f87289145b1a9e. 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/a504d689-0feb-48cb-b20e-d3f7074272b7.json and https://artists.proofprofile.net/proofs/artist/a504d689-0feb-48cb-b20e-d3f7074272b7.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 0xee097e5a420fc9214097472dbce713d664062c76aca4caf2e52a34589ca5d386. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCACJ1536840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43aee2f38ec21735848779d23076eb2e258458a6b194d73e66b3a1ec65701f7. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCACJ1536843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60126260f54123d4bf4e9d768504e5a5f79e9f27b1e3688f4e04a8d4de183f72. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCACJ1536845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04b0c9240ea49e52416ea5d52e429afd62b1be7d21ac81911a7f8b62abf83ab. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCACJ1536846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88debd81a7a7d8ec8d79f1bfcde04cae045f2430013f198a2019d8c1796177c7. 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/TCACJ1536848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f5efe6d98d4862fe6fe2dd89b7e8aa4c23793be2b4822046c6b7435bf3ad38. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:25Z), 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/TCACU1671392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e89e00e3b40b3023b16c33a7c8a0ee1e1cce6c6eddcee77fc5993e1b156f450. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACU1671393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5486877948c5b2ceb50b167ec5d4e9039099423491ce58ba4268d6fddeaa0cf. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:11:33Z), 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/TCACU1671404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1861e12c92986670b985aed4b7c1ee9a5712442a93881893f4695fe6227fdaf. 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/TCACU1671406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd58cd1cfa7ad237a16b2e4fa778e4595232556823be8586235975a49200898. 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/TCADS1810522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c0e5f1e8f21a6fc9ef55a815a431b872baf7b5fad4e73575454a63aee3a19. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCADS1810528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2cf33d9da9b60f567e2f44796f9f3b1238cb4e6d8827a12562d7a8ca23f27. 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/TCADS1810533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be2aefab1b3b2937b2542938e167ddc176f413d6fffb3513d0ce5965bef020. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCADS1810535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9805efb75e42386d71945763b489f2dc25071ed9d26887aaa8ec1c4f0284de2e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCADS1810537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f368dc1873be68b04822998c4b4f17f229ed3852db5b302c9e57164a774fb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADS1810542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fcdeb200d00daf3ae1e35c0b1b2f5f46ee1245357817b2762596059777c3a7. 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/QZHN71947691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a178dd52328242cfbc3818eb77ec5896b5921f70aa6e8a059a79120876cd7dd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA1960171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0545a7530c4137f02f1672fcf13fd36c5ddde2ca82ab13c32249f4489fa6f2bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ22041189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df14e07996a26f4590e913f70562f7acdf16b1ebdaaa15dcf163cddb11467b8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZDA52058742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f22d1831ef6806afcdb556754884b0c286baf21a237b5fd546e05ae2c534d62. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZK6N2079601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce663bb954b2ea50d09c9f99d98826690a2cb01708bb4e513c44f2c784b76c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2052433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94f707b1b60588e2f27eaddeb4549d2584181a1d8c113a840e862fd1163f6e3. 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/QZK6K2052434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583acbce7e5444cf4a180978ea8ac3392c8bb251c6d67c78179b53cf1764890. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZK6K2052435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea0a20a5f246e640857a59a196e8db42d85e8a44db13052365846a4765ce9ea. 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/QZMEP2111782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e01793c936c8683cb684e056029b305ba9c73432b3a65de3f5f1363bbd396b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHNB2106664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde822d27a8296a54b64d434847e381b6ed20ee34dedef6e5929948e640c0fa08. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMEP2111783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f18b8880111a0aa906cc8176aeabd3de13c92395cd477b7a096093dd5f9a6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEP2111784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b386a149515e6d2ba65f55c1571c3e7710e0bbe44455ff67ec6524f310e34d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZMEP2111789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfec136e6a259c7c50bdde177fa8c1a06aad54ca9da3ff91762cbb63937401. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMEP2111790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83963a4092fc43bd2ddfc23d25ea89443cebbb97b32e1746309fa1b8a345f624. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAU2253253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc08746eb0829cd756503f8821328fd9a33ccdd5b7f3ddfc0b11623a7d8d885d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTB22254935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236993e393981363b6695852ca6ba025e5301c1c982151b00368ebc4e76e5595. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB22254937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa983f1f2de2384c34aa4d65897d2eb35f1fc4e9f4a72b9e1b4dfb1d1141df. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2304933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11d5a6e9f0fc95480bade64e2e228fb968f7af30e18c0ec710ea5b08036ca7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:32:14Z), 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/QZTBA2354589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ae15f657270e49b2ba51e4ec0eb8972a0e71341662377ade86d9ca17691549. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:53Z), 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/QZTLA2452981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac0d6618ce35190e806181862e82b6a40ac59e7245f2d568392ab96e929fdc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZSYP2470861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a821959a4c9be159d5766ee65c3b43f24a3c90bacabde4ec4d3acacbd567383. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZQAY2461932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828ebfb41fe8b0f1fddb83e86c5cafaff9b3e5297fb2a9253c4655a3686a0fdb. 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/QZQAY2494894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da3c2341bbd67656dbe3d140c77acef4e57cad4e1cd8d20b24f7636741c53f7. 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/QZQAY2421066.