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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fc95f944f0c8f3242b96923b2d9925de2142f0c311c81086aaad47a0650da1. 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/ce4f5dcd-de0d-4292-8c92-68d08e8b4866.json and https://artists.proofprofile.net/proofs/artist/ce4f5dcd-de0d-4292-8c92-68d08e8b4866.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195212db5f4769ac730f637f9ad1bbaca10aad5be4bbd0dbd45b1983da285be2. 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/QZFZ22031626.
Sola (feat. Cold Hart, Yung Beef & Pochi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f5cfe93b79c6b222364acbe13a421ff237955993ee2a9c1967ebbceb9063a. 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/ES71G1912350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41c085beb77a05b1cab695799516b6df5914df12c6f92a03d813fab01db056. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32315792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848f884e20b5c540d0f1f9d793d1d02bf9a5b092b820683ff6998838e4eb871. 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/USEP42014008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec4cebb302df43f44dd46d217d86b811cfdbbdd42299c7faca2c92a12db806. 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/QZHNA2303538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383eabff2043463c1ec65e4e6129b0a99e3cfd55877df61b7dd292612dd0327b. 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/USEP41951003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce59f6210307f1dce4b18c37ae015b2aa44cb5b9e019adb0add2f1cb6ead33f2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES91835138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bf0213e4d3902bfe441a665b3114fc70523e6068b6526adbf96d50fda3f5ad. 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/QM6P41836997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f76da4c19d7d49cb54263f2d3cad6c6b928c59fa6538d46efeb0338f6a642. 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/QZHZ42121805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd6746b67e145f91ec2fce80eb54e20773aa2155e176e716044fdb53d8214f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEM1956400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa63362c15db52c2b5f1ab36dc5cc2ada0c49f8d61492ea87cc84b77a1b9df60. 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/TCACZ1750349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41c085beb77a05b1cab695799516b6df5914df12c6f92a03d813fab01db056. 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/SE6I32315792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72ca1adbb904989fe55d63ed0083892809cb12c2b06ce75c3c99df4d2da4b3. 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/SE5BU2240228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7ab63f3fb3b23a2e716b6dcf4f3c6c663e0f8be2a331fa2cbbc360c325c193. 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/QM6N21905336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52efc0de8da447be111bb7eab7851d2472d13a359938101214e341c89bdcf730. 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/QM6P41890829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2fb4558b89203fe5082799b9cdfaf5c67e720edc8d0c9563878d3ac03dd871. 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/QM6N21980518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b049df2542422ab2066375607d666fc3106470cbb398171dc8980fa86aa131. 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/QM6N21980543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032063a1fad7442de8a40d89654fe7bb69b6695062266b2c37ea5b5c98f75388. 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/QM6N21980551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6692bc1d81e3419f7e27c9ce6bdb684fbc8dcba2154e431a56d2b2f3398ebe. 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/QM6N21980570.
Not The One (feat. Horse Head & Cold Hart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f068613b4dbeb52915793a6914957b4d3d2a627eb3a4401616a9b0e1701eaa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USLD91719097.
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