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 0x0d27a071d1a91137e6eead156175dec37969b63094d90395e4470ea81b75bf00. 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/6e650135-f82b-4dce-b1bb-1023d8c6ae56.json and https://artists.proofprofile.net/proofs/artist/6e650135-f82b-4dce-b1bb-1023d8c6ae56.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 0xb28bde464d1039a38ba7305580d6f1f8b20ecd0a1fd0128c0575bfe728e248be. 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/INM1Q2327009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e001484e53c0e2141fe594d0502dff6a91616a001d695ffd0a890d06bdaea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZXLZ2401654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f836d31bb365d31a1d8c500e85a22da67305259910e5ec8d8a7f9b160966cb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZXLZ2401566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164d1bfde20e8ba5fcd693d84be689b618b3a51a7f5729013a95c8d2edc6749. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZXLZ2409126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477119f6f89ead063f148b64b2cfe9ad0bb2a38f12c3c52ad2dae801af529a8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZXLZ2409127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c5746948f3203171f284f1b1a0f69393ea3b7a176e3351abd383af34314d2. 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/QZXLZ2501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad7b22b5a6849bb2464db0b700e54732bd7b68c0ed287e65164a23f508f9577. 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/QZXLZ2500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27046468fff7ce43ae77d9bdad7efcc7c7cfbddc5b17595143de660ed7c6f3e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA012514331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0a06780d686f923970fd9532e90084632d12d8ba121624ce9a08d9da36dd5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZXLZ2504288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2394002a81e899f0b6ba7c2b659c88ea3053358e151e5aba7dc67be3a72ff. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:58Z), 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/QZXLZ2505092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb586059a6cadfdbfb4d2d7e020f2d5922937cb87cd79a8a1858e3f82fa22eb00. 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/QZXLZ2506793.