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 0xe5bcb66f4a386ed2b7e6b4efba60e3fb4626504e0bb4f434f35856d350ea9c19. 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/e369e8b8-4bf2-4d42-9998-13086fe383e2.json and https://artists.proofprofile.net/proofs/artist/e369e8b8-4bf2-4d42-9998-13086fe383e2.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 0xa9f4162eeaee9198d2e839fc25c845dda1dfab06f344ebec907534f66bc3ed7a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN82038309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9cfd1012da033e20767df82686534f671d63cc95eb35baefa85a6b82c45528. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHN82038310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8946f37eb117aadebd6e7a93ed63fdce8e50d7b5e0c98b88f35201fb0772a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN82038311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3518143f885434687df4df1343699d657a161fa6d6fcb0ac1259c774c6b6d053. 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/QZHN82038312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a23aa9ba2ce82e4c22f02fc6fb5896c1af544d996f2bd258a4cb2e2a05ce2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHN82038313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352ce7f030aeff47d6df4ace273ecccc11c963f967efa1c6d3d074e7cc30127e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN82038314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831863d9853ddf87067167829ad8cc0b14c7bb81bdb095d26ff4c02730be0dec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82038315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f067bc64f15f9217841715557189b98d8f3d3ea7372e7526c0cc2377e368f4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHN82038316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14014a87528d60c816b2282dbd1c2eba6a6da21620e1ab18aad77d6b4ea43135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTCF1006305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851a277563cd7c48f9de247a3584c349e4ae73e86f788c8304f326fc624c0677. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTCF1006310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd6e14367545e366e5e3c959616d9e7a71a1800d97453d344f32cb229d12f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTCF1006313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792d6c3fada53edf7d34d1feb57d227c61767837a8299f467f2146a377385513. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTCF1006351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608b10c504e7bc107807f9401af2cb60f2082a4831cb36e01fa2f1f81aa7a1a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTCF1006338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3287769f0c44d5e697b88c2b779d2f08fc3435aa2672390fc1313d4ecbce4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTCF1006345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829dda5a81d3d319aac1d087c6cfa0b3829e6da3c6a8e598f542e18731330551. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USTCE1092387.
Stay With Me Feat. Cady Groves (Acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba49634067bc0ae4f921e1f08dfea17db820ca552766fa05e2c9d25028a9afa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USTCE1092403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03f819a9283990fc3d1e6a27d2b79a6285bd4843426d82adf2c0d874b4dde1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTCE1092416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ff6ed9ceaf67be61e73623ce5f7c5ca35692f64976b729f7a95d406af2528. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USTC00954455.
What Would You Say? (Feat. Tom Higgenson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272c247c83aa38a7789b5603e14888800cf17a66b9676f5335cc58713ed7c871. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USTC00954502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad153b602372cda0cc53d7dc3463c2f99b36457e33dcbece1b36af161f10618. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USTC00954512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5866a7d3b185468e51baaf0d41f3f04eba9622bae2c002cc774d6b3ca06d1f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTC00954534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dcbc61fdbc1bafc4bcef57157abb3773651a3fd87fdeec2e0e427094cdfea3. 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/USTC00954559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a08d31c4db9584545c2ac9c1f92cadf7f4a19da2834a6370c1fc254e629c40e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USTC00954571.