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 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 0x6dd1ee58d697d4fec26e013c0b352966d7749594475941677fe28928812ece7a. 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/bcb74f98-e269-4c0d-a9fa-8c3323eec8bb.json and https://artists.proofprofile.net/proofs/artist/bcb74f98-e269-4c0d-a9fa-8c3323eec8bb.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 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 0x0284cea23804c910dd6b0deadfd7812dd67055f1d3d334b9bce1723092c44ddc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDHM1624433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643dc443311a23dfa1cdf24cfc0a5ef08ed7c61740eb159c3bfa35e710a6f42f. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/USDHM1805028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56053338d141d0b19c20f90c9a693cfd302c2b76d5166d753da562de34956a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDHM1807184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7ecb5b198731df15fc7438eae07d05eaa4c8bbc924e130c6367101caf6976. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USDHM1807185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99236b699c53a58155741ab546c411a044200e5a5ddc02b0c397ae41f2ccd524. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDHM1807186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f09c51c4ca8ac8c61cc25cf774f17aaa232cf5c9315a3448ad42728245291e6. 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/USDHM1807188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195787f2cd5ec81adba35d2ad36defa11d147de9bc8588889fbe70aabbf8b07. 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/USDHM1807190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38612d5babd9fcae64e7502f6dd95dcba39296c5fccf0c8c1f3bdb2e114decfa. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USDHM1807192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f3eb62d4fa7ee2c7dab9603ed7c5966edc9ed8409028864454b32a73e96c13. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USDHM1817738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b4f8fc2584677144ff51b3c6499dc692fd0a997f65e0ad693222c665815a6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USDHM1817742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6792330885cf23ef091f389b35190cfe437b71196e10907a09b43848ca543. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USDHM1825723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a41bc174a172d067813f729a27c6e387251c8c9a90b651f8cd2f2e5f11ff6. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM24S1915047.
A song I wrote for you when we were falling in love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a23f8e5bd993d3fda58e447fad269fcc0da43c3bd065cecf8cbe73533b470f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM24S1927763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065853598f3c9f70b069b997dd9db4dce54e7368ac4e4f621108f9f6179e2fa8. 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/QM24S1927764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a362f99daffdd35625013a23fe359e1d56e4e4c774552b6c5f9be137420487. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM24S2105060.