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 0x5409e437ef346fb855d3ccadf72c669d1cf9ca8ad0224603c14a782f86a5d929. 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/3cbc0793-4013-4409-b130-ef9efea5da2b.json and https://artists.proofprofile.net/proofs/artist/3cbc0793-4013-4409-b130-ef9efea5da2b.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 0xb067249e86ff67093f47db23f6e7ad369d1fc935c1415490a17a531f1b5b7279. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM21238665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fadfe1c500cb6727233999c91bbdfff34c1d301bb211768b63c8f85a2506f5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:29Z), 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/USCGJ1729151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4d43f17a2f5017aaab19c2a64e0459ae58657289c15a9b90598708bbf139d6. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USCGJ1810940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc913abf1ae0d8cb3dfd942b5898516c654b259116a451ae53f29f4780f97f3e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USCGJ1810942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbbb19e6b3fe2d9b487fca776b3b218e367c00703ce3a7ce5d4b8a40d1e78dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ1810943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e7df3d85553d56414d126e8c926f8d0252854581c56fd408ad04f8c2e00ab. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1810944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8153a2f319b8e7fd901b54d2a913c92d8b27fc3d96f821b6922f9215723f9100. 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/USCGJ1972180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1914e2b50c47f0ef7282e1997fdda07147bc09497211a2152ba29c25f083a63. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCGJ1972182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea85ab38b9b94f256df5077d633dad7a535489d84224dc6ac2b6d5b679fcd9. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USHM22044325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95730f727697b0dfd2ecffeccddee3a412abbb861dfadb285290bbd3dbe76e11. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:00Z), 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/USY282005464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615fa9b2b157620fd37e89646d24bea5baf5fcc3dc61ffa7a0592b259148100c. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USCGJ2234835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac51f2facb34847941aa24d2d33f62eac94aaff9a399d036771333dc89fb0818. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFYX2469683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0313b5b895141e6bc135728dde72fd84d3362506913b2b1338bbe067726ee98e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYX2469684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856129d016dc3d00935d8ea73b0cb957babf460a044da3ce3c44e2166ba8fe62. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USDY42449166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8e384c810604ee322e7ecfd290ed9af136ff28216e7ac603cca9ab17106340. 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/USY242405150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ab9d3d8a0fe78c12f370918fd276c65fdf80522e136d9a40e390d3e9ad28d1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USCGH2559522.