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 0xf8b9ea4669186a862ea7021a3cd7492b4251dfb6b6ceb35392dea4c0cef23ce9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca6f975-ced8-43cc-9396-165ff8c57945.json and https://artists.proofprofile.net/proofs/artist/bca6f975-ced8-43cc-9396-165ff8c57945.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 0x7b4ea47d428eee0a5479bce5960125eb71436a268991676bbac3540de77e22d0. 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/QZNWX2202252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3aa20f1557bf064c628b44d88d85c9561f900d4b1feddfa9f1d581993e13e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWW2299121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf4f9677d906afe26d7d663918bd3408e7e1cbf4b8eb956cda584c4af51006. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:52:28Z), 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/QZTAT2211014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2c6d6b872210887f3fbc8cfd3a9d01b33d6ff285383c673e821817885ad1cd. 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/QZTAX2278990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c69e8fa81388648c480b24135b0bbeda09e22676a0cd2f320f72691afba879. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB22216516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607cc4c3a8e35bf49eb4812c7e0844d5f3e7063b00fc16dd702c00603b187c2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB22217693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613ab27348592492ea8dfe2c37309d8d1cdc125c0cd14a1b6d107ee61615d831. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:45:33Z), 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/QZTB62287015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87677d251f5b9f15f394ba6a7b4f3b7a7566e115e3f5b477587fdc1941ca31e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB72244915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5e39a98140d310b716bf159a7dce3481ac13a5ff50d06bf1a0e92b0c2e0a9. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZFYX2384875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ab2429c61dff0a024472c8d11e590bbbc30a3ea017244f93f435dbe0e50fa. 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/QZFZ62380928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4991ee5ed2e4ec5d6ef8d5f6a74ce5279eb9399c1361786ae63b36e3a6c95. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN82382315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2976e10b0199738348e90d2a752dba527725d5ff2639c010c4f24a6099e4f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6M2358262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cfb4aac2cd9d47a7cd62ae9b85131e255f05b5fc628fba349c045c901d918c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:11:04Z), 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/QZMEP2395178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8b0e776ad5a4086aac18fda15900dab777f46cb6489719f93aa22b679b3d0. 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/QZNWX2360027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572af86eb1b0283781e981e60b6b798d860846df2476c0227f6ad4843797ac80. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:20:17Z), 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/QZNWX2358678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d4c2c4828764b5bfe636d68d347e82e54f78f56dccdd6d72867816eb7ce67f. 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/QZPLR2366402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81caf8c17183774a37754fa82f5f113453f18fe33539d9f2eca444fb41c180b5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:58:44Z), 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/QZTB72394611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2614b4b765ef4ee4f3769ca7260c99504d1dbe29001d6fe675a734c363dce29. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZES62385239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749bcbb56e41080c1460beb114d48c1ff2ed982fdefe72f31bfd913a77fc229b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFN2395389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1834198fe9e61676012cb9b58c9500fcc61f8ca12dafca4324cdb4c9294fe5. 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/QZFYY2479551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbf35175cd0998dd00859c657d5d0b4e61373a17db9254b5076fc34a9d5521. 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/QZDA62476504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf22816e72a955a2038e42afe0c250aac4eea301353e59e11a4dddcccbfc07f. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZHN52492613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c1c2e32ebaeb57d94b31b14445f3803a8c4f000aca401927de34c9b028381. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN92468065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4a41c34c2853e055a56a62805322361de21e786a91961549221670eb6369dd. 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/QZHNA2477834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58866ce9e0f61054fdde93d0ad8e8663b31774926fc9f68c7253ed144c2d58f9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:50:13Z), 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/QZK6L2490994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47bf063699eb65f8fe169a5076688f89a80e6d4169331e812df806929cdfb3. 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/QZMER2431510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe80a38a491f69920ae236d0795fdaaf1582021a84b3d324c950a051cb891304. 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/QZTAX2463194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457f430bc600be32faed33003fd46e857f0b3f0f3dff91aa2738f3e346bf24b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTBA2461582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b7a5eab9ce1741e7a41a6cfc9dd3ccf23cbbd6c90c70542f679a543723648c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAT2210365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e898e5698f72ed1d587218cddc6c8c863e576b04835f711ea9816a870aac4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFP2406779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d4963ef460e0547f5a820fd7a14f370dc238fcef1848ec053735884b8892db. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QT3F22464714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda14e7f9a23ccf5e4841b98e470ee0ce57e9eb9e4ba59fae94feee9a965e08. 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/QZHN32553931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736dff2d7f0ac2d38d7fdef1c889b9e17e5aa72d97eb61f37bda4ddac098e0f6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLZ502500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32851e2cc6022a4a27af35d5691df62f96c1e46abaeb432792608f7b41fb8fbe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:38Z), 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/PLZ502500608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ace0b5889245b6d090c14ff1e94d11b84c487b14727112f236c79c830c42e. 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/PLZ502500610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b89b13dbf27f44f50c1e9e29b8b90f7728c7fabf84a45033bcdfa89c13cb7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:17Z), 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/PLZ502500611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e80b55dfebb8b994c5cf772eb955f9300cb92c7a06bd725de5973d15715e61. 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/PLZ502500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8526ed10958cf18141665079ba4993cdf6089756adb9e26ba033bfa28076db. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:02Z), 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/PLZ502500618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94b33708ea930e55b2f110f6c874c85b120725040e47331164b5d0bb064caf. 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/PLZ502500619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3598b4810159d034ac901668cfe6e895171b99c6f323ff88aa083468827ff5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:39Z), 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/QZZ7V2596888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f848fd7592bdeff15daf5aa92cbb26739d331a54fdce2625d33010c29af8d5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2534279.