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 0x49088a1f906f54dc894ac1dd1f3e4bc8019707ed3ed529152192555a86605470. 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/7b5aa814-ebd6-42b2-9af9-37de9aa24dcc.json and https://artists.proofprofile.net/proofs/artist/7b5aa814-ebd6-42b2-9af9-37de9aa24dcc.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 0x77e07eb41ab3d35d603a5d78dd51b362ba39d06db48ed9119e19d0a763c636dc. 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/QZHN72011077.
Fratellis (feat. toobrokeforfiji & CAN MIT ME$$R)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5e192183f2aabdd2995188f47bc6d6818cc08faf41d38fe9df80ed22c393ed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79fab59d31afff37154bb7bc6b3683c3b0f82ec8dfbd3c612fde924ce56550. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLR2198726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cf0b2914ae4f44e976c50b44bdd13df5b11359ff0f9d2371c34bd3acd72cc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELV42301108.
Bessa (feat. Loco Candy, Sin Davis, CAN MIT ME$$R, Okfella, Souly & prodbypengg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bcfdc0241a4e518fe648dab6d2bbed072da3ecd22c0fff8763b25ba28012e0. 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/DELV42300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b5c68a35fb2f5618b6259cddb18833346d861e517cafb3e4a531bcd39517c. 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/DELV42300723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a6f96009f0546661bec9b3ed58157c29e6d050be45440bc267ccc30b0ef72. 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/DELV42200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c80188f4e473d2360d81d2616da897de8e4961bffaf961be2251fa1378532. 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/QZDA82194509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e07eb41ab3d35d603a5d78dd51b362ba39d06db48ed9119e19d0a763c636dc. 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/QZHN72011077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b8bb9ba0b3b53b8b1a0958b890acad50c701c45c259d9bd9c4695bb571969. 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/QZDA82194510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb77018dfeda28c40040be9089e36de2c150ecf64625d3794a9393d449b66725. 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/QZDA82194511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7505d0be1632ccd6216182a2a3afc8a5220dd8bbd164120bfcf387fd75e582b. 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/QZDA82194512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67990e484d4775956854f24849f1f62d828b18a908857dd779961c0463eda7c. 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/QZDA82194513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed47423da57b74f9772acba7896d84f54fbe681701687ada3edadd3b48f088. 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/QZFYX2142847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20822252a580d73ce6c1b4f69a080827ec1206764e8bbd999cff8935a45cbb5. 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/QZNWX2002967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedefb7c7beb3f9de0f9eee681caea5c8ac6f9d6aa681d102aef084d0c0c1d885. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEZC62261012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ab9c42e1707764f00c48766442ef278fd9a0a90908d7b9cc8d006ac6f3006. 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/DEZC62261020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498746fc53f8b208a50540b32eccf98d2dcbdb8bb22fc103c8ed84a9caf93490. 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/DEQ022290119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da816d65e12d0043e089e3edac0ce513e4609de4a22dd416c91ca36b9003b8. 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/DELV42500759.