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 0xbca68479725c645f1a411fd719a92205a6407b205ca8afb5cc720f39d863b7ab. 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/91b9c4ac-2a2a-419c-9aa2-aac52ef1cc81.json and https://artists.proofprofile.net/proofs/artist/91b9c4ac-2a2a-419c-9aa2-aac52ef1cc81.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 0xe11ab90dc5d82fbb90f2e2bd418578b5999afe0e5bd1a73251bbd3c38afdf35f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USDY41526107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae578dfea07f99a77ea11cf054ca6ec745c7acf7945462a372326d64b6cf12b9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDY41526110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0941c85d903715ab9653ec0a1bc7a0bf13e4c2943ba5f9e28e446f829316126. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USDY41526111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5342d15d00222c0739a8ff1307cd92f7d4eac2d4ec0c56d91d85197240a18c20. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZK6Q2441351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1865efddc26b2ab6ee64b08e39abc130a507be8a629e438bb8285e343f0d1226. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USL4R1937261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16eeb8c05e1551b3663c70a54dd2cca9761e328f2c246577f132c24de1c6201c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USL4R1937263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a5b252809a1e0b8871d9ef94fa76b21faaccd3b95d12206ae2216435629d03. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USL4R1937264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d56a5c1198b121be00680fe65b624c5225c85a14b75089e107b937120eae4. 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/USL4R1937266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545d4671cd959bdabb39f2a5e1bfe8bf09fff0c83df69de523e763093101e558. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USL4R1937267.
Wayne John (Demos and Outtakes: 2015 - 2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83e9f0ee29591535adc1e6a2938411673db12062662cddb65bc9ef07eb316e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USHM22026812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65363c9edad30bc54e8c33e7834ee27fd93d5a347a8f9685a846bb9ae90b546. 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/USHM22026813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91e3ad2f9d8874b0dccd3e4fe6d721a5bcd0880986fe65147799823592cd6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM22026814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2e5438dd89032010ce121a366da73da98e2c41b5c1f260105d04da6661343. 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/USHM22026816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b5be7d5d10ab1338842c769ef47ddd732125d3958b1e55256062e1f374127c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM92064907.
Mr. Downtown (Jeremy Scott Rogers Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7322ffd5f9433fb724864209b186acab589bd28cf011d218627ec1046448432. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZMEN2117389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77679225f71bb787278f15d324ac3eb6a409a5a5c045b650ec94ea71c8f4c3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZMEN2117390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd47847bd7f7f15e4dd403e99b6723f0ba5c99cbf8c6b43ba9d4c46a3524fe7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZNWQ2128009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd8ab4e20f86ae18cbae3ea0ed4b9ea16c24243119590ff88bb595c43cd35d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTAU2119065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fb6c0d9a689ad1c53b4671d424a610baad7ff7e8fe6f01a97fe9e788e3cd0f. 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/QZTAU2119067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418344469349096861201e9673c3349853863d5ef564d732ea1c9863a62201a. 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/QZTAU2119069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca403df859d9c452ec49201ff737add9656de9357e51aacb600e7b246cb17d01. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAU2291581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2778be1d3a3f10e7e1934c3dc9c3bae31bd834cc3371b26149630b7980a1f2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM81934513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5a22bfeecda48bb6e380ada9bba3d5f36c37bf575356c03bab86834f03d3c9. 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/FR6V81603251.
Indie/Rock/Alt Compilation - November 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d9591cbc0bc78e4ce377506ac0adf21f2b56c656f56782b0300d406d6a5efb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMBZ92251291.