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 0x1e6ee1f58679f73e7e8251f333ebeffdbcd2e87b97b67002e9508385350a0fd7. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cd785c9-37fc-4410-bc71-299d6f042c4f.json and https://artists.proofprofile.net/proofs/artist/8cd785c9-37fc-4410-bc71-299d6f042c4f.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 0xbcd11b983d2228d7fab8cc19540a68fc93b8ad5ad6603e8aa745d2da79236566. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2399674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a41b03cdaaae9550b9451200b6617cbc921ebf8a6f1c008f14236fcce801f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHN2397940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8f3b420d1efd6d98d8afba1362bcf3d490e1c7776dcae082a63fe0617bcea1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS632388503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb65b3afb0ba6471e4c1f1b9fc11f118f8632fe33153501eeca8b365d184279d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM42K2346616.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d07c094ef79c19822f028adc28e9e5f19dcddb0d6b08a12c717443945284a4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZMHN2393027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9059840e850ac2aa98ef5a2e6fab67f18f14fe7c059b13a6247a663c7b6293d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZMHP2388982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38efaee23c79731af0dc982c38288d137858a999939369df8c614090ee2f107. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMHN2358684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d3a9a9f282ea33c2b37e9798598cce68adaaed061ebd01962cddd08e00de78. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHM2339578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c4c0415f4b7720152604b029cff428945479c8632028d43275905a6901ae5f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHM2321283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde44571d26b3a32bf1c199e30aea7c6c0e4a7d191ddabaf577d845d5aa00d99d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM42K2343256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e8f46f0642c77894f6a212145274453e01e74f2bbfbf57b75158bbf7e2a37. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHN2338232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc3a8dc2274cc745d744624bb387733436774012126e3613aae8bef3aeca683. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS652348184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d6513ff94d0c6d36d419f1d85f3129a0b4713b9aebfa4f878c8a2e74ac88f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS642302600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f4e96bbe23c31c412f96459bff37d069ae9812313119ba7b69a07b4e3e069d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZS632356155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af79b091e1027d3cb4ee34609f49f46fd277fa06844930aa0d1c9847ce90bd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZS632320429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a22bf7db78defbcfdbc486b57d02f14912683a190803986f2fedc1b2d7b7c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS642359688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d89d13ebf575b73f64786a18e7f00c4ee4a0e31bb7406d6e296b2c73ab9411e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS632366989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665fd029459fa1681bd8917ba3e7efb93216fb73e2f4ae640003eaa024cb2470. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMHM2386587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5278d62e028b1ac3f82f1f46e5a281a05bcf612a76a7d103dafbe58e1feda27. 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/QM42K2330951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20d3908b35387fb87eb4210bac966d44928a81e303f9b66257d29739c1ad25c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMHM2340544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7d812656ddfca3d85cec70b485574d059e0aca00edf3e50985a1de47bdd28. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHM2362373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b43ec68584cfd62e3e4e47388ef763a27c57d9eddf1b0155f675ef29e645c3. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZS632324187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf45ce27252caeed3ac6756085529abd31956a70ed14b439a51bd58082afaef. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZMHM2397161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013bac526563744ebc6d94a3fccb2927f3f35c860650ac69a516cf64810ff97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHL2377605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9542903760a93239377ccce71f5a46afece711b61bd8f76eb2d152757c3538ac. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHN2325333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae296d16d657d96c70a7e144a3789f08a54552ad4e1ea873dedd683a27666e1. 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/QZS642344133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7f72f0082be0927b9efd0064790c9cc9b510d1bf7245bf6730fea751ae34b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K2348151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397a9d0861a420e293cfee86102fa1255832a5e3f46deb10524aef95ffb385f9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZMHL2363671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d3eb973721a1f0b9cd5c7fc99ea6ffd4395b5b2f7c70909f23954845d069fa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMHK2344838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10601aa7a58d4e721e902cdd7fec99f020c43e6603cf6deafd7eed8858384f4f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMHP2348029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d169a798c774af4fd38600592bd12598b3c57a913fddc52c2baeb71770b61cb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHL2314289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1ff78707f3e4689cd7c4a16a83ca160c140f012a2b5967cec3cc4ab4a706f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZMHL2304373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ed07503e6de09c844d6b9801d7d301cc2ee783d49337fe157311037172046b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMHN2368634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e343214576258b0d50918fff1724fa1c4387d27a8c2d7de172de3c7c1e38ce. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZMHK2374717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51900968dfcaecbe82d4bca9e67d50e2a4e2c361b11eaa87f5b4c2a7931f6c88. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS632353697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1f70f104dc2fa84a9c9473b7420f0513126e6019f2516ef49803ef2b87ebf5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZS652364029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb771f95a3b925b312df9ac95d704627a70543ab8605452b840fd84194832906. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS652311802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f4c75f36c607d61f0510dcadddf768af8b1601551de311e9dad03b67f4bc04. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QM42K2396260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a8f8675588518b8afa301f14e09ea5f782966076db37657cbec7ff1f1ff528. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:52Z), 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/QZMHM2370904.