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 0x69628d0758fa430d77fd7851e52fdb5f697685ffe0567c39d3d84ba25abb700f. 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/a5253b8e-21bc-4992-83ca-e04015ac909f.json and https://artists.proofprofile.net/proofs/artist/a5253b8e-21bc-4992-83ca-e04015ac909f.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 0x8b953a63cd5d03286babe1fb666bdadf2877d5bcab829b945831a69da0ab20f0. 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/USA2P2424089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f01bb986456c40a8a6910a4cd6fe180e0cc5e317e4e41d5b35840ea5a810e. 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/USA2P2424090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8324e3408e3d368c2b9e354964497c418771b14ce2ca63b3e88a56a35da532a5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USA2P2420921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8940331a43b902c7c2f443011092e4deceae3c0cb7e31b12ed2268e9d4ce5e01. 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/USA2P2406871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8940331a43b902c7c2f443011092e4deceae3c0cb7e31b12ed2268e9d4ce5e01. 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/USA2P2406871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef8e6fa510f85d1071bc01dfc11a8d51fc4a8744baa3a99f306dea628d131d. 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/USA2P2314913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1ba996283cb08db7836f67e65f4389cea094f63e2985540e2f1465fc6bd45. 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/USUM71502001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c2a66dd1dc8ef39343ba22c09ce453e0ed42fc8feb9032324ec7b4278efafb. 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/TCACJ1514177.
Going Up (Straight to Greystone) [feat. Dom Kennedy]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb2833b9f9ba27440ed745f789db766da406d5e59b5e848b51dc712f5be646c. 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/TCACJ1514178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a962ac8e1210ca8334279cdfd00cc9d4042b11d5368b3da0922fce7af5dba04. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCACJ1514180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04faeebff220ef3ff66cf74dc4039b5593f62717488729c28454b79704358db2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCACJ1514183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26748147d1d79f87dee6beddf61a597dbbe0dbfa1922dbc9e7920c1069ee0f23. 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/TCACJ1514186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f134c1744c1a0265179b763fb98d35239e5df1aaccf621ab69d68a4355e43b. 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/TCACJ1514190.
Talkback (feat. Dom Kennedy & Joshua Mock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3dfe4a1e1f2a3a13ca4071465747bf88543b670cf89b1a41b1f588c2534cc. 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/TCACJ1514191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8915efb75d64364fb81cc7f137c0af1620e130f89e2c0b1dc523cdade15ce6. 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/TCACJ1514195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c7d597c3827f8e8e93378736f21df0feda1e481137938410662eea28ee36d4. 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/TCACJ1514199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ac419ae4df9f01f0d34bc11149707c5a823facc88a3b4a87769c03433b1a68. 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/TCACJ1514201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8324e3408e3d368c2b9e354964497c418771b14ce2ca63b3e88a56a35da532a5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA2P2420921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953932b59020cbb2c9137a6dfac9dd75e5e165759fe063e5a9c5f4e177c692f9. 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/QM24S2203813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44d28adf05907da301ffd872c005077a60c8ed4521748c751e96a1d9547673e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCAGE2238557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75b7f906371295d5e1513452336b32c8b7807f9a0a214838efb26f7e257326. 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/TCAFF2029279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b315a5ef91c5ccff762005b3eb431d0962b1d93b624aaa463fdc2b17d6756. 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/USUM71817185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeeab8655c74e2a59822990ecf0a1ac84f1164ed8c0b5c6a7b82947d6ed0a0f. 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/USUM71502000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ec8e1f2251a5ad1b806417b8e6e7468e21dc59319071358b69be1311c0dff. 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/TCABF1218181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874007ef39ce308f2c79d705739d25cff80e29c83093853779da820f89e9f4c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71809911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9fc1787655b6b9a8145af10976d82091ca77f27abeb1045b646410a4055416. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM71604277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d2b1f3df9bb1b5666ba59ef6c826b83c8b15a195a19ff31ca00bc10f3dbe6a. 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/QMJMT1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cceaeab8388e873bb25ce7d235d346234da4141b1adc0d87c574c83fd31afe. 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/TCACU1683761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52156246ff3395fa749197ad249c98f53968d44d6af8eb82872a377e832d7a0c. 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/TCADJ1728792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba3824467720a475a9c0ae15f413eafd50a03d55fd529512563aadcc2d61b02. 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/USUYG1070636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d0c88321a4536f68fa255bfe3d2503d2648a3acd5866f8207713a1f08d4b4. 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/QMRSZ1802582.
Survivor's Remorse feat. Dom Kennedy, Jay 305, Eric Bellinger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f7a53702d96f89c40668d689c4221c51b44f38020cca5a914d8f768fcca24. 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/QMKSC1901216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ecfc601c4850e25d184885b4495b9766bffc3d8faa62cb0c08eff1db4b194. 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/USUM71416467.
Fan of A Fan The Album (Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02dbd006f4248fe7a0c46ffc94199ff107b08c9c00cd72b7c7241c6ebfcf1fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC11500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef8e6fa510f85d1071bc01dfc11a8d51fc4a8744baa3a99f306dea628d131d. 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/USA2P2314913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f348eae6056baac41f100abdd44cc4ea73361573e23ee4fa65d908d1e05b7a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA2P2315034.