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 0xf03e9a09a127af91a92c400669e73c557a8da88ccbd032c0b1a1b309f630421e. 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/cce1de4a-cc1f-42ec-81ee-3fc8e679bd02.json and https://artists.proofprofile.net/proofs/artist/cce1de4a-cc1f-42ec-81ee-3fc8e679bd02.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 0x351babc6daa6df2ac0c5ee06e5171036b54471682b6823bac0927ba03d7e6d54. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHN32183270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004a2d4703b0c57c442dc4bf70534355c09d4adfd3ed4a5de7dd4aa4e1d6d0be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTAS2125940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1e7157bb03d082ef4b0e88bc62aa9cd87271f688a182451387d6eb97850923. 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/QZTAS2125941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a3ad8c89f4a766cc31b0b43549c596023116c9f993beee82be7a5319bc193. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTAS2125948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda84f7022d54964f0048514e2ccefa3340a2ea03a132fb151ae6e8c5c4777f40. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES92279614.
Love Her With All You Have (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba35c9f973109ce4e9540672d44413359b6927a9ffbd039b1cb32d8c70144d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6Q2244354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebf49043f7b41243665741c9937b7246d04a8219624222a8b9e52ff9289e8cb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPLR2291263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36abf0c62dfd85ee72def98892a196dcbd9bc70c804f88d069106a8eb571778c. 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/QZTAW2274859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ff96db86a61831fa7367ef7aa8150c5eca21ff83fef1420396e5abc6a67045. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZTB52203406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163d20f9fe1f0688653771ad7f5bc2157f058844d3a8db7bba9499f04c543654. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES82387169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde571a3f8bd250e851a297ff30e19cc22d0b53ed4f7ed9912f7760bd3ce5cf46. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USLD91749337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe73006242633a2f2f33a47b5827662adcd7dbdacf822397734197702d91a71c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USLD91753908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16c420e5ff16f47cb3e55efe6487f0127b6c77933d09c958467bfee7887cac. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USLD91755173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ccf05a52c2a97d97933f06bd67b83a06fd218c2aa2506b1d0fc6b67bb73ea3. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USLD91755193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7519e7f64b5f0e23a7ad21af4ea823ed350a177050d4ab1ce188325518b19f3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USLD91755225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4e1401b0b026717179dca27cc1a2c4d8f1d314804597d145086aa5eb0cee6b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USLD91755351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b5c01067d3a7a7c86b250df5a4b792eb94d6b78b07c9c33e8e370720e9b4d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLD91756192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b8d15c2281b4225aaf90c2014514fc9293be521305da0c5bbddf6c62b1c0c. 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/USLD91763440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9444fc56b3950a5c4bf5d7580cbff98334d397cd3235f49039fd9a9f6616603a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USLD91767924.