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 0x230760968d6307879e0df5ae8d0273eaad11446b214e263d2ef224286c441722. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/549cb01f-8a34-4209-ada9-9d6bd182fb41.json and https://artists.proofprofile.net/proofs/artist/549cb01f-8a34-4209-ada9-9d6bd182fb41.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 0x4a306e007c0f2161ef1625463e2597413246bf58755e16af7c194e5389f285bc. 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/QZNJY2326950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1f3dd186111363228497a874b8eb6843434f4bb8102de7e485118f939d3b53. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZW9M2235799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66a332b8c3bbbfc2a5e42d506f38bcb8d92964bcf6320cbfd93b78493fead7. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZNJV2249978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db25377eb17bb4a0e459af66a0ee6a2b0870f6ddc7180f94ec989dd5ae54189. 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/QZW9N2241942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7f2cebefe6562c0e09b677b13a04b88f5e2d6e6799bcd39afc27fa4d403c5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNJY2265032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a3fea5c8cb4e4c54638d15cea566926117c5af6a96a954bba5c97af322888. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9N2241943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c4309e401dacca621ae5d7c8ad89b321fe86ec8a6d180038489c1e7c9a4266. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZW9N2241950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df22d5660d8552a4834bf97ac88b5a9e0dc4c01c56e0f2a1627994ff823e98c. 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/QZW9N2241944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af9f3b7d6cce7c462f9225f47ee4b19caafabf15be4ba3d1b8e283a872cea3e. 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/QZW9N2241949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef887b9d89de1cc60526f8714a0a4f06077eca0904a1396c8d36465ab6a1a75. 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/QZW9N2241946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee8d8e6f5a767a0dcd081e38f45697665c7e98e165b770ab66baf0c763e5fc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZW9N2241947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d7a7e083b09d3e6f29fd6d9027b1591bf0f23033c7b2e3569a6b8cba94f23. 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/UYMA72300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4275c1b48c5f2c5103f57666fa30ff03f8c36bff31d87690404877914ae625. 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/UYMA72300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca540944856de11e0487f47e6504c5acc9588c19d981d08f014c219b77d1fd67. 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/UYMA72300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a33fdf3da9a5c17171f9e6941611c81b9a0235096a1e2bf74c8f75a4079d16b. 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/UYMA72300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8501531dfba33e45a5768080317c1ff686712d6757f352b47915c1889c7534c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYMA72300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389784ec63ef1f96ef6666345386948df76da7925e712f306af8987c0597395d. 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/UYMA72300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a371cce01148318433b6497857d505547e550840697645499885284b2d1989. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYMA72300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb3f95f652cca0a61973b709867c77b72f4d6d224b082071d29571d2f5efbb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UYMA72300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e07b5c4fa66c2f176a147bd60e701c7a7d19bea47a2d4ff7503a2f099cfdf. 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/UYMA72300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe9f89d2f807a19da6dc458335586601dbc05b62e5a89a9f4c5b8134f2bf90. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/UYB142319400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78188c301038677a784d3be36118adba5742d9ebe12f7ec947319db4790ef24. 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/UYB142319402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bada4b05dc615d3d3af2b241742732737ec8a38ff32e5ba900626203c74b1fe. 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/UYB142319403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d600909457ccff31fb15440ccd077e5b0d0a7a651c6d556af773adc1e08b32. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UYB142319404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8b39895169641388c0c43d8ef37f526b91cf8b91f7fb527d497f6d97e8ef42. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UYB142319405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19142cd38367218a1df7d720ab81314c5609a2c8d8ede53f5b8c4d061b79f5c0. 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/UYB142319401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d0bb781e38919a28bab62c57ccc89d9cecdc8c29a87f6d57c3b0045337907. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USL4Q2355205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb6c8b24e1f7574a0d8add0372fb1f759dc2b864ae94bed909a9380ffa1567. 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/UYB142416102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f6f7ad9acbd00512f02894344ebf5548ae9ba0cf23430379e588183d11219. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UYB142416101.