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 0x0934ff9ad6e658e4cafa4b956ae5887bbd5585f7f12a35f6f33886d95daf052f. 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/7daf72f7-f00e-4d7f-bbb4-748754293aa9.json and https://artists.proofprofile.net/proofs/artist/7daf72f7-f00e-4d7f-bbb4-748754293aa9.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 0xb9a66ed392ea217d4d85a3bb39ceb495e8e7c376f53685c91b7acb034236494b. 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/JPE871501779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5bb89e412008c42237b376d04438ef22e4f122c19fac721109b095ed83adce. 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/JPTK01801880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53752250df7a582b803bd2dd47df3b64313e1071ef80f7d7d675abff2e32dbe2. 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/JPE871501241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19714384334b306419548beef21ba5d52c2cadf46bba313b4b77d6a6c798e720. 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/JPTK01801850.
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 0x93c83be40504839a3e4434ea6721f3aab323939f9b30a1e93be57f8c06ad3d79. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPE871601778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a325940bc59a20f72b52c6309e85006d14dbe1de01afe60e9790a26f41750a. 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/JPTK01801860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb242f4931853eca164943ee44d54cfb496a99e15b91146db3ae3df5d50a77a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPE871501238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3493da8718f0e3986ded83243e0f75b6fcace4e51502613c77c25e3000c89. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPE871601781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80e6a5425fdd999cc698c35130ab0cee4e34b67e81a92148fa5506329c363e. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/JPTK01801890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf9d8e1536df8817c05b0642944861f014279f413e4948be7ab97be60b423c0. 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/JPE871601777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ff7d5a7b104248ad63b24f41b3792b0f97d17c847104a4bbde150efeab0cc. 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/JPTK01703070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cbd7c7eab901815b6c30f846048ff8072ff417058e1de7f21d94e41ba3eaa9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPE871501242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313571b0c8e1c43ae6dfec297809d721e849c15c5582373cd5b760ddec45e1fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPTK01703090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a98753871703307e8cb1a4c565f3056f724a8c249d5f505b23854f693aa9ab6. 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/JPE871501237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d99d1bab71177673dee56c11da89b40dcdfda20ccf33600a3e20b0d42ecf4a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPTK01703110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5638a7f93ccdaafe91703be7164902497fa1c316947f1d70792e125fd7fc794f. 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/JPE871501240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd027e5d7cb8d05475c3745b1d1a0b11f06a3e7efff74186709e43fbb64a039d7. 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/JPE871601782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc3988f11a3ac1c4f68d61e556c76c8fea3fdb5dcf36b3f33e7acf10c9a534. 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/JPE871601780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba1b5fcef3220d6e6f6031b2e7f1bce7935fb7f5da66868b7528a9e8b4a598. 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/JPTK01703150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6e12f506a0f9c9f5b8468c1e48aed2df8d0bb5388a786aac89f9c84c50d78. 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/JPTK01703160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1c03ec1fd3cdf5b6341a2a58c0c599d5eb20da8484ca3789b2e24f7c42e7ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPTK01703170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18982ef2d9783869a791f53810390fa9512e7aba98bf933996b198e9f1448772. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:00Z), 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/JPE871601776.