BackTrack was a Linux distribution that focused on security, based on the Knoppix Linux distribution aimed at digital forensics and penetration testing use. In March 2013, the Offensive Security team
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257ac79b3a11938aa89c472f8ac7689e8933709a59ce1f34f5c46ffba942e04. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9dd06e9-4460-49e7-9050-97dae66ffc14.json and https://artists.proofprofile.net/proofs/artist/e9dd06e9-4460-49e7-9050-97dae66ffc14.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daafc85062386a1cd01b03f47683a8eaf002837c97d82a2568950d98ede457d. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USQY51406188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ff87182e46c086a56fdf436f350abfa2c2c83fa36bfe66212864a015741d43. 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/USQY51406189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874aab641bba2ede6a7e645113dd164ef1fc3a5b5433c80e8863c6d1c544f602. 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/USQY51406190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa13c93fb4813fac39330990c29f89a48f3d43930a33961d79e4b61559d0b1. 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/USQY51406191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8c52123ae0ba9f5a463d70694ec2ac472e492c65a195ee609b7c59bbb5164d. 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/USQY51406192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b313d447ce272fd21f633c58b7a806bdfef5203aea22176f0f2bed007398eb6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USYZC1002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81c8f35b6098bd6882ee2c9392b2cff6137e0daed49495d2817fc4a12d9368. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USYZC1002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6880de24760af77fdb3581964b24bc9e3f2141bbff78f3bbbfd39bef4b96b936. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USYZC1002103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50634206f7a8751fb5bd506ad7f80bd0458cd62769abfa4e6e62e9a20a81ad9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USYZC1002104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147ea752bd3ac8c02c43eab0444f98ac7b286b538112da19f898f48f7ec49a0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:39:24Z), 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/USYZC1002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a311922cd958f9988e383f5b5c25b85b50f643e18ec853faa2b5d2edf640b92. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USYZC1002106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eb589fb9b27a5c7dcf6b070ec764e46d7274032caadb9867448602dde2ef4e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:00Z), 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/US2Y71400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfed5a86062cd3ac66adc361bf9935e5b70618281486f6da7ae7708825a4745. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/US2Y71400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfab9af8ab46501785dd942fa93f25b4a3cbd0b139f613c3468181ce3f1bc79. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US2Y71400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e65ec3a4cdda8c325b02da6a4613d0fea164d1dba11f2216aeb0990f2247e5e. 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/US2Y71400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf581dbea373923c3617fc3bc4d5dd01bdea0fd23941b01c824069aab426e8d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:45Z), 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/US2Y71400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3ee02a1a00d6702be67220b83a589289bfd7e0efeea28e6c5374b5cb76ba05. 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/US2Y71400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49590462d1e509354e516b4544e2bb1c283ab0a3e18faca93b89f140fb0af74d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:10:21Z), 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/US2Y71400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48afcab3ec1fba14fcbcba1529c8dcdf97f4005bca0c5f6c375da127046ff05. 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/US2Y71400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83658fc59642d9bdc409602491f05574cc4966a1a28e580ac8ca465e587c3bd8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2Y71420303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29575b31f3f4f775544749d78921a8646ffa32ac0d7e2053b4bed4bedf66c690. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:19Z), 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/US2Y71420302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83658fc59642d9bdc409602491f05574cc4966a1a28e580ac8ca465e587c3bd8. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/US2Y71420303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97270867cfd9cb5900ae10086d3854ba545b78bfce11bf992d55cb9bd84e81e. 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/US2Y71420304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9819400a9c3c30c3deee34c0017f1dd8fcef5be6e9f73866e4f12e3a598718. 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/US2Y71420305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e6b5272a6182f06cb42ea3f830320edcd3d5b76af2e6575bc37a71480fa6f6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:34Z), 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/US2Y71725001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bbd0430f301dd37f274fbae9037c5589c8fc3fe5225dea91c855c6793396f0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/US2Y71725002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac882dee8cd3a57e69936777b9d0df8414d22a22dac596426bca1337e7d51d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US2Y71725003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346af97663d74c8ebf1bccfb25ecb47837106f76bc2d8bb91f18bbd7f3ff9800. 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/US2Y71725004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b100fc210ec258346b8b34d95a53d7f21697817fba14aec42840879e454697. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2Y71725005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e53a9139900a454315c2920d5c70e6b6a039bd63ce920ebccb8eecf873b35e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US2Y71700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad442cf1b132e97a3bfa11ef335a1f74e58b9106a0bafa2ad6daf9bec6ed5935. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/US2Y71700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe285d8f7a5acb2dc0c7392e2d3f8d9eeb9c84155439af0526474245fb07815d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US2Y71700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9f99749d23d1ac2d9b4945aa619b8652871b512053b7531e1a63b37fd19e0. 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/US2Y71700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c593055789095bc7df3969b1f8a12e1ad4e12518401341a477f10d93360695a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US2Y71700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980c1edd3287e2bc5bc904267428d167a0ff64c80ef68f4aa0439a83caaf923. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:12Z), 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/US2Y71700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae40141ffdbfa5ced0308bf2c11250b733ab9d911575b1e1a90dceff6995d9b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US2Y71700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e6b5272a6182f06cb42ea3f830320edcd3d5b76af2e6575bc37a71480fa6f6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US2Y71725001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bbd0430f301dd37f274fbae9037c5589c8fc3fe5225dea91c855c6793396f0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US2Y71725002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac882dee8cd3a57e69936777b9d0df8414d22a22dac596426bca1337e7d51d. 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/US2Y71725003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fce3d84e47421240bff31854b08c8992f15ee365840a3b93cbdd444adfe97ac. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USQY51086108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72bba0db0f4b912a6ff12e10f7fbc59c5b5d2cd3f75ad3b323d1b61cf319037. 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/USA2P1416552.