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 0xa38bd3e53fb6d6f275b8f948bed5e065c0ec1afdad015a46ff0c99ef03cffbbd. 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/4a437fa0-fcef-4ca6-bfda-cc636af0bdf1.json and https://artists.proofprofile.net/proofs/artist/4a437fa0-fcef-4ca6-bfda-cc636af0bdf1.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 0x19fb58bdf894807d874b15cfe352948a64f5b9614bd57b3f33fc4693cf50c80a. 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/QZHN92440639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b588447e1de327ed669dee2f5746f8cb48817a0ea090e1252bd93758aef6d. 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/QZHNA2411579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917c75d3c96ff35fdbc62ebd260e8e20938e6b6739239f3f99db365f93b74ae5. 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/QZK6L2491761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f73a380a108d9bebc1b9a82c5b412e9b6d92fa5074494ad89816e64a432997. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:44:02Z), 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/QZNWR2401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db0fa1fe8908a2d54c467faa3914ae7d7b7d4a2863c9b72cb3f2fbb2982050. 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/QZNWT2474617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeec947b589f870529137ca0b9620b08fd0a96f2aa63350fc67b340849c4b2c3. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWX2495570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed79dc3603f51b0c3e3e335120efe348d50a0389ecc5e7ca789d851d41b645d. 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/QZNWZ2499554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf434f226a1b2c28c3cba61e054060fe62f4bbaeb610301c9a5015389467f1f8a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAT2443804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29622d9c7415cb3e43b442f67ac635170a2d3edf63d1902497fec42195b633fe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:22:19Z), 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/QZTAW2407682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc774c7919df356c09cacdf276e7dda4c87673474c4f40f48b93b9b73cdae888. 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/QZTAY2475365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b01a53f892b335bbb79a5a761363ada317cf86d39e4e71bc6dd86aba37b8c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB22429747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eefbbd9f63c303f41f13b765e6655bf527e11e334ba032b0479bde519a4496. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:52Z), 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/QZTBA2481237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb7121770a161bf453757d88963e617f049d1668e773d63f834719add20ddae. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:16Z), 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/QZTBD2490855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36d3f9efdceca4b4cff87d2d4554490517af0eacc37df077adce4395324ba7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBE2441270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c79626797cd40e191acf34b7c9eaeae6f2eef1888150532004314838ce5152a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFK2487455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07c106cf6201ef5863831fab94a2aea6ce4b94f84bb69791f5776ccf88f3b92. 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/QZWFM2402944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7874c8a5d71ca9d1f12f1f7a8fb6dc899a7064c26de01f1d7dbe090f2a179. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZWFR2404029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c7ab37c45f216cabee2a24065e7e29d9b70e30b3692d045332dc3af52827da. 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/QZWFX2402161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce5bfbf3db6cbf31982dce84981b6c28164c285f5049c576670a160bdf22310. 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/QZZ7U2455864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffe1073295bcfc5bff4d30679076ace46721971fd1fdc13263aab03980d1a6b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7X2457367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186783f94ce9a494e1d190817223024ecb514fb9a6a09912529ac46047ddf6ed. 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/QZFZ72529456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedac5f6c58a4a735b92b484436da7aeef1b05b12904a57bffd6204f7bf12085b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES62565020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d12899accdafd4b20edfbf271a791c41f582ae56517e17f676bb69f36227f2. 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/QZES92543046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27877d5d2587798e0ca3a8e4ea0b1860ad2f042cf97d1e6af596a352ae0e8c39. 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/QZHN82598537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe6baf24421134e04f52899ddf6ea699fabc8b757bd6c7566d7214db0537e70. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:19:41Z), 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/QZHN92500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380f418326ca93666d61f33787195e062fed7172b3fe79a2bc8d905f7e68088a. 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/QZHNB2507572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f789e2ddf8d76e3ccf7f647e1c0762e20aa98a50bbb52034cf95930fd1e292. 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/QZK6P2538274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe317900ac01e78423f8a9e7436e84cada83a7e794519f86690e48e174ae1e42e. 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/QZK6M2578938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75008ebef835bb002dfb70b44742cc6a3057cbb94ebbae443f97b451761d6bc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6H2596324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e56c98b896a34bfbbf7ec8835280aacce01a15d5c1d4d7b5480ad36723b8a4. 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/QZMER2512377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf046413dc41dfa68131a005ec8cdf19e9dfe7442225f897423fb6d569e4e3e4. 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/QZNWX2580744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7abad38896cd9ee180f513480242ab2ac88d7fd7685c267a0113debab39c30. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZPLS2515066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08fa6afd26236b7bb0a99052a04472ffb7cfc21022abdd471d857167b9916e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTAS2537439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151c14cc5eef75a132465f4b478d37465d097db4a45944278441365db24bbb0. 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/QZTBA2579607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f562787bb6c1a9d3164f71f929577b5d342031c629915a00b846e602e1afa. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:51:59Z), 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/QZWFG2508297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b8ef6b9e2e50d6d40fa157b25042f408beb813e135451df78fee280649d665. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7Q2560240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cade20aad6fc2ad2389f180486dd45f61ec6988ae0f56864b4eb2e44baef158. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7U2563950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c94429ce1ac0569f590852c898aa25df9cb389a3c4ad4e5379acc84a08b76. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QT3F92580580.