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 0xb480ec037bdc7962bb4838b3fa6ca719ab90b1f4e89fe94f0a5637b005813643. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55c995f7-3303-42ec-8947-7b03b8b2e290.json and https://artists.proofprofile.net/proofs/artist/55c995f7-3303-42ec-8947-7b03b8b2e290.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 0x80d673d3d0493b1f268a2324a98ccff630b9f7080d68f27b5e4924c727378eec. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:18:05Z), 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/USCGJ1730522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6385c31dd0e5bdf6e19b7ce4b0377a06e281f4e73d76a3a78679f1a8733bf482. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ1730526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96013932680254ec9bdb43dcb9eaf0fd562f4639431d0ccf3ec122e503a350bc. 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/USCGJ1730529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2765a9ce0c553e3d8efafb8801d48a609fda46e06467b473c9fd1a2b3f1dec. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:23Z), 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/USHM21830455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174682b12b37ae57ac87571338e2e123bff943a0d1dc8e0c782434310c2b9188. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21830457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a538ee3909a2d63054649b3b63eebd1da131bb247baace4dd052b32227e293. 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/QM2PV1802864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd03d9a75ca5d9719f63c9a79a2acc5a9f32d571a459ff961cbc047f02c0931. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM2PV1802674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18cafd1ee3d55ee3ad2e6459b2b4f0556f145cb651ff751332951bb4faeff0. 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/QM2PV1829956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e9f57fa53a08cad582f9607c50e6a2f7866a60166a3c5ca5cf941b0a076978. 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/QM2PV1829957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75bdcd3a5451884103135fc9f48dd01297afe88a1d6a77b852adaf47536714. 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/QM2PV1843229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0867d40832d6b96ced8902b82c3bf6df30a43f22d9c27e33d7a39289794457. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM2PV1859876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4a4b79279daed175921be89cde53e35f5da47113c835d0579e1eab385d21d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ31931815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd1b4a75ca3858f8dab9313066acee51befff86bf51bcd46d9e802f04b76f3. 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/QZDA41999577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e278b87f6f6fe71b701f984b6f81495b69bc59142df76052947f1bbb7811e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:35Z), 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/QZHZ42037487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281b224ae28acffb1c93eb18d9ae1f55d6779461d517e31547662e06a71b0115. 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/QZ5AB2163302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b3ff4221a6d547653c7b9d35cab91c56ead34eb3205ce207862be089cd3663. 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/QZNJX2314603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb56c8a9823582780f7fca716abf8b1662c2959006a199015f043952e7d2cb. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZW9M2337913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae00730f5e8fd4ab5e1fb7e5529f060a9d054787c7e5b372968e38fc2a80e22. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNJW2456221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad00f3965ffe02d5b23491b4b95b66a32e0343c4427236da5711ef227455f7. 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/QZNJZ2460143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fd76c050d0a482c657ba6eaba76a62c4b551af74a100fb24a576048e9b8a3. 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/QZTVM2459968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547db987f723f05330abb0d46a1b35cab7b7ccb0d4b9fd3b61d75af39f7b616. 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/QZW9K2428673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6fe9ee1998eb6abc292073bf1e134b8803dab30818388b1644222c9159d325. 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/US7VG2556946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ff0079e1b505d974890896f2fdf21359e9ca518e8718f0dbae0a2edee0ab3. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJX2570094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc2f29eb188c5d30720551cdf66cf7bf44366c7d3a7896746e88a5c635b00fb. 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/QZNJY2588790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92335369d17df95846838aff299d9e0e401c7533665d1e4ea353d881190d32ec. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNJZ2558511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb773e5d760ad11ca789681ee7ac16fb6d0a67a6eaeace0592ea77739abc56f0f. 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/QMBZ91758071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbb0046e668730219f3c7c9a2994b9e9427425326796894f295466f16939a76. 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/QZES51970634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939c5b420baa7197d31c0c11203313ee805fcbd1f67af418a36163288a42193. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA71893142.