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 0xe21a626733cb6c5d0bbcff5f7861203f0ef7e1e57faeeda43c7a816a59bb5b92. 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/4c321ce8-767b-4031-93c4-2a9cce47bbdc.json and https://artists.proofprofile.net/proofs/artist/4c321ce8-767b-4031-93c4-2a9cce47bbdc.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 0x35d510cde16034f4aed32c3318005b78504f55b9feb308981bca2f9cec305934. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:17Z), 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/QZHN92036953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8210e6f2f8d4b5ef38b8f43addf165cc948ed355af5e238b9e1e89c3b65f6601. 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/QZHN92036955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a21240747174adc5260565ffb5000cad5e91fb4afd76a4a551ddc742cb8abe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:53Z), 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/QZHN92036959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf575b9890c9ce41de755c7f3ef14160286e6ffa46aefe5b30d0e0f2f3e3d338c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92036960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68282634408127fe7e693730271ef31ec63d4da84c7ad4ba0d05903ca054d3. 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/QZHN92014154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d11c7319510e05409f3172480c02d0c9e253b7c1e7122336d72ff162305c15e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN92014152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5888c8ac2d9961e961f526c8a493977deee53e06825fa51f311db14b7159d7. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZHN92014935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edd3d7912e3f19145918e05de1d5a36eba627943779309a035e2fdefcffbc7. 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/QZHN92014139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb8d8740b8be4688420f2a9429ccc9674cc008cf464ada9c08ce86455d1391. 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/QZHN92014138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b69c32a2fe5ae248c59be91b93f011d52d502633904913fe6b3a6d9f75dd275. 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/QZHN92014134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd035c66c9f5d68cc64b1238820910c9ec63bb95a8aac9bf969abc5dd846a7c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN92010318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17261ec7524ecc747352b4b292c5265932f5bc6c777d9b59aada44478e502385. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:31Z), 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/QZHN92010316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b7b981358cc50ddb415abaabe3f2932914f3ecd031e18aba7e13987d3e52ae. 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/QZMEM2064339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50911f549fd99eadaeeceef0fbef9292325f8c20b0c92fdb61aa21d5a88df516. 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/QZNWQ2046101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d28c4342cfd7f7dd47bbcea9473728184da4a4319baa33f414af21a72ece52. 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/QZNWU2014341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ebdd8db3bb375748429ebb8433f042230b8aa0d44cc7b2b4f75d9c049439a1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWV2034014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bee31fa345f9bab088e55e5e7f3a14bf7804412c7dd97ab44cd1114563479. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWY2005619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6575549900a3ac48233c6fb5442d41ab67d1ff7910c85941214b1f7c09f6d4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFYY2177890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f42afb75e7b5650b712e5f3e01c92489b82d5949fa1526973498de6ccf1af46. 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/QZFZ42240663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70dc4e70d341469e7a530bd4584fbe5a02b4625ef70254cbb3a9da4ce6c6915. 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/QZDA52274116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d15e26a1ddd99e570257a1b75a8385d78b7019344ba18dd6e6dc2b02203c08. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES52229587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be3cddc60a509330ab18fc33cb1f005fbfaf55ef003b514381fac7320eac52a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN82283357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f28bbe94a93f64f9f4e4d32708dfb9a6a761782c8238e4184e2d951464dfe65. 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/QZK6H2219048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895b2d29911f2cb220516ab2b31fd65b20e1e6bd60cb6913871f2a51b8c5b52. 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/QZNWY2290128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9cff8c2ab4fa65cc7da46985e552619883de6ba970c5861ab62cb9faa89331. 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/QZES52309325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66243b415d4309cf1331dc7238fe20715f55e911470f8d34dee53f590ceb4b8b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB42487829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fd7038de1cb940aec17daadfcc3cab40452aad925f2c546ff129eb53778235. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3EZ2475347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8ce0ca53417a26b8dd66a2f6ab5a94a4b2899014de886298f776f48981a340. 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/QZHN52555529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b54797db6825649baad2b9e81ace75a2d4708b217d3c239806fdaede87b26. 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/QZK6Q2546067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59232956c18af14c7c8bcbef2042b38d9a84deff2470f902c41db5821243acf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWZ2587577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bbb5af49ff2d92b69706a8fc9d687fbb905da055490bd8bf9ba8b9394bd2c8. 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/QZWFH2597887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a725ab44fdf4a7804b11f274accd2308eac15ed151e3b26dea48e3a7420d1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ792578081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e221fc165dab230a3bc0a824b971922d19d14372df491cf4274abcf6aa709b1. 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/QZZ7R2553992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f1a85e91650354f1c06fb1612402f89bdcb67fb1cb976dcc468e74528c638. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:56Z), 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/QT3FD2564366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab23018221dd54fbdc977a1c7a840f83ad7ff6c91ea7dd0d5325b36c2038d75. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:40Z), 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/QT6ED2530334.