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 0x6c3f0a202e5da7bdfc28c4bd03b8b357d5a642a179483d0e1e9629ab9e3c675d. 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/8d11ea88-2c0d-4484-86ed-6182f95b4144.json and https://artists.proofprofile.net/proofs/artist/8d11ea88-2c0d-4484-86ed-6182f95b4144.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 0xaec6b429b8268b8c0f0890f7aefaaade86723f9513b40b11237d1f58468e0465. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN92279611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b174c97b82a48c44dccf4e17bcba33b05bbcf2b031059764ae385af719405a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN92279612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553c5841fb8ce97a1507f6c8ef74565e1f726a3345264b0f3bb95b07ee7e6fa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN92279613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6303482df5b3747c6ececd16707c38a72face384361c09f9c87e681529af4786. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92279616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab0de3c984dd2dabbad4c3ef4f32a246a237c2673dbcdbf6e77a9b979e91b0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN92279618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd8a5f3cd35dbff1329f44e84697ebdcb5aed90ee49c4ffc62b15f13557c24a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWR2291045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c43950225b411778a92979f076eb8132a8cb729c796ddf36561089c4f9a28. 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/QZNWR2291046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d51a2e85e68b024fd581aebc7f38e743c18e334ca05244aae4219646f1da63. 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/QZNWR2291048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d35f49a39a19f073be9d4abf6033b59fcec68b47fed1fab4ce8f765d4b30cc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWR2291049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f16a711538a7cc6b6844e310ee0a6ee17ebd346f3f9764c78d7e8a47d627b9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWR2291050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c6020528b6bac4b2e64d69914fb7416bb37e770ba16cc6b476b38be58f669. 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/QZNWR2291051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6cc872f80c55bc0aa0a2e2853f7d081c2af604bfea1da5405e378af90f9977. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:32:54Z), 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/QZTAZ2332530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61feaa5eff515030931cbd856a6011f77c5d6c14bf70cf107cbbc400b57f040. 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/QZTAZ2332531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56099a4ac676c63b34cb38ba51cab5940e430c26dda2225bb3b7cf552e696d5c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAZ2332532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a400d65d117586da5dfc781168d219a18231b5ebe385308734aa04131acf12c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAZ2332533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cca62d02b1d2c720948c6cfcdbc750057466bf11a0431e71b8c420ed37f3af8. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTAZ2332534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41cff2da26343c2ec9135263b07556f55b3ff7d00b5ace39427163a5b6e02db. 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/QZTAZ2332535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15d59858fd90ec98f00f89192e899a8e9abe0cab8f42860066747241e3da7a. 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/QZTAZ2332536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1d50446089cb72b81f8bdd6b4bb51cd4f5d1ab0ff651682b6a2379d6f7832. 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/QZTAZ2332537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf701e1c718266eafae6543987d9cb85b42d084ac09af5314a1c0dd60bfd3bcc. 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/QZTAZ2332538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d6cce8b265076bd18900531f4d57c019479c0c59b0158e3e0c1f9bda3e7c0. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZTAZ2332539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1092ee40442565f3b9608fea68be30a6b6d75b22ccbe4f28c97a652f9cef4e1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6H2484228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2748374413a3e927d22746de0291b9027dae326c2630aeeb0973ae59362e0b8. 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/QZK6H2484230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759ff6f1315d38208b4f09d22aa997a16edd82721626ad902f82f1406bde281. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6H2484232.