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 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 0x5f498306ffd0a5ca8b5efb7dc7e5750823d564882201a8e79f066e6d4aebc53e. 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/34ecfab3-c13b-4cb4-8ccd-3e190410c821.json and https://artists.proofprofile.net/proofs/artist/34ecfab3-c13b-4cb4-8ccd-3e190410c821.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 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 0x115353b91a0ebf6c04547d4327778bf7cf5046fde5d584965cbaa6cd07236db3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN32157243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512d699b89e186ac38b6a97c1a4ed814823954a061d3c2b0f4a34708ef97b3c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN32155671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242b1032e5a2284e2e88824977034bd5e32cd4814dcbb0b5e7192a656de6cee. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZHN32157298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7387d7043e8dfa088c088e3446962aac664e643cbd57aabf0418b06e10d2542. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN32157391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833bfe581407ca3f05da6c57ac135125f19b993bb75b79696c87a502c3fd9e94. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN32157392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2a1df5244eaffad02e87c1da89e5643de61a9fa6975fba53c5dbffea4dd6d. 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/QZHN32157394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b441184b8d9b5d95b816be4f3756010f54d9a4bee2d83647cefb8817ed489d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32157395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf5815d15f6646fe37115c790ea909de34415fb387c5a9d918961ee3ace5bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32157396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41252edb4c953505d05130d13e207ccd7a92ea0635bfb7ab795ecc4e15f62fe7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN32157397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b220cb556cbbee5bd95e72280f106348e1c048b10abcce3d5d6ffbf9983d0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN32157398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d8786f1e349cf399aa6d639566a33e0760af9114505acbd83227831f7c8bc1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHN32157399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563e3b75c5bdcdf4b7042c2045a39b8a57a75f2a27f0dad8e012a0e7ab580f58. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN32159112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e56c6d38214f8dba0da60dcdc68321480b721fdcf1664c6f0b8480e55ce8a5. 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/QZHN62145707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0b03e5ef7a35258b690f7f9ac69b36837639deabe850de7ee5465fba1e58af. 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/QZK6H2194818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae58beaed75cf8908692cf02e509585edf23871bf46f2c444df1d2c521ed307. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6H2194825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70064db04908171098444d94fe6de2d910647205d8d35a08052380d8a74cc4e1. 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/QZK6L2298211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a58acd5486bee440f14b646d60deb055b88f9a7e10104d17777f9aa6a80ebb. 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/QZWFF2363686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb22f092747d9435e4b2418cf33db9b53fad95816ea3ace7ab28e1ab6dbc76. 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/QZWFF2363688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8221f4efda55c54d02e7e660656714d13107bb68579c3af2b36a6712036f58a. 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/QZWFF2363690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619dc670b9e683082d30270336f7160bd4d74383cb9a2bf63c4a98bd0dc13d64. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWFF2363692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db6f0bb674c00fe20d83536bcd16d2ad2450cf4dc8cbdaf0543ce8cc2412ba9. 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/QZWFF2363695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa753d7cddba935318edbd9dcc0980054907f730c78a114ebc98a2c19d68f4ffb. 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/QZWFF2363697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b6d99a8f1f8db17db7ace6923f564226aad2cfee0c54af1c467c6374d2ada. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWFF2363698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e94d83dc037bc1d48c0c2142ece75d1cff10deb7980c215f5fff4a0e760388. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTB62569987.