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 0xdfd77c33366ed011cc96abd759c1b48f896331973a180ae8095ed9ef891219bd. 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/e9899f61-8a91-4453-9fb9-51ee86558f0d.json and https://artists.proofprofile.net/proofs/artist/e9899f61-8a91-4453-9fb9-51ee86558f0d.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 0xdd68d16e7810c7f15e25c9568d0b1c9db6782fd913788f3c87d7a78f64105bc9. 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/USHM81900686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fea8bef59c9431bf135c467dcdc331a1bcf8271978a2fb4abbfb5341b6a6b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2116205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909617080e088629a7de4fab568aa4e0337dc077e5665cf965c6728c0881ea0b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZRP42173534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b9a612659df26d34ece89831209c5865c1cb4f5521b7e58693b2eb1afb03e0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA42228146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea94c8a3955d312fe1b1386156ad4f65bc30e4099bcc5c3ce25b7ee8649410ef. 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/QZFYZ2303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed898bd17b6711814cb94d01e61f45d5f89d280e8af59de67498e0147f3235. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:18Z), 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/QZTBF2369642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf39a089f186975b86cebea056d39cba746292a284c1480719e1ee440fc301c. 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/QZK6L2443814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fdcb7e54351e2fffac371072445e00f00741af789fe33996c94124648ceca9. 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/QZK6L2443815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53b586bcab26c75b4413b85620f0bccece04b8978aa02e7df7b6bcd67be119. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QT6EU2540957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ffe87340c4fe0d5f3dc667436e0864926c952afb62f282bcdc53ae520b4de1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWR2169367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe3fe2f4ebfe428b2ebf591964d906ac2e480372400ce02fdff6fe62a854ea6. 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/QZNWR2109846.