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 0xacf758cc7058c916ad27fb380217edae99b82d4d8c86eeddd8e305f9a1ed0bd6. 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/3f2e1e91-195b-4edf-a56b-c5d6ada686bc.json and https://artists.proofprofile.net/proofs/artist/3f2e1e91-195b-4edf-a56b-c5d6ada686bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc36f5132ba6a3b94f192a886c1287bbe5eefc288daec384453e8619256cb6afd. 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/QZP7F2540033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1dcc7571e32abb97ccb0939de9c3463bc6888238d4fdb042553b358d42381. 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/QZP7F2540034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6021dbb8aa7f17f48d72dc20330e74eb1573eb61d203cce70d1561be97fa1b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZP7F2540035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b37dfd7820f97bcaeac66eec18403cdd967f78a2549c7a593a79b4a055db7c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZP7F2540036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3341e0f2ad7e603210551c0c526e3338ec86035b77114aff1c689ae8bd3b2e90. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZP7F2540037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35bed551289502221ed8f5d4d13bdf1bcd524bdcd073d6e54d2ac80e428394. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZP7F2540038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286d854893c988bd858a7ada5e73ca0c4dbf184a8e88a8e9c710edc6ddda457. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZP7F2540039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b73d98860cd2fc47bc9222847b30fb223d15301cfde63acc3fc0408557408a. 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/QZP7F2540040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b50122aa85e4e4558744cd1b18e98edde5bbe9ce0d28a4ff904ef29dac1dbe. 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/QZP7F2553367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf315db5a295b6fcfa6b7298a37379fc381a530e674764e51ac6eff21b06ec399. 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/QZP7F2553368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57319db76a3e979b7b04e518572d6cae402b8b7fdfe5154a87ae46075f1cb97. 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/QZP7F2553369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1133fd7de94ee50253bd317f36de21b2daa4fbbce529dc3c55c48c87c05f3b. 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/QZP7F2553371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db164e6049999a37b06a7ad973acd1af2c04a6d76ebce72d80a52c06f46e6d5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZP7F2553372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098426571d3321e1f3fb77d18b5d0eef8946a5e0cf0f439cb452bb0c6b0d6761. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZP7F2553373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c94218695eddd15bfbecde9484829a17d54713fb613bccde74a2207f3c1d23. 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/QZP7F2553374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eeaeade2aa1b983644dd8a5811ff0fd7891371fa513efcaad2479814dcb03a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZP7F2573217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25466d589a423796c059e37b2a1b023db1da556076b475b00e6d7f51daaabe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZP7F2573218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e3b3f05b47a07aa10c5c0e3b862075728cac033a42faeabfaf7c258dd82d6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZP7F2573219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8205d328c30aeed135400243e4e716bd8e139656d2af186a5a126871a7ecca4d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZP7F2573220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aa7a8acd4bc0303c9cd74755d89bc6f0b4172ed4a276c04212923aa3242a81. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZP7F2573221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c05dca55107f1b291a8c0418a40b117ce9041a89e0b175f656473bd06f3f54. 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/QZP7F2573222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32059bef783e4ed357b825d262e142f301a9407adba10b15660eb39c5215db0. 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/QZP7F2573223.