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 0x4c675f293d888778af83806e17a5cdd4d65c450e7ba0c24fc264e05033ac9ad0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5145f9b5-d7c4-4d30-a2f1-4d9cebf4c370.json and https://artists.proofprofile.net/proofs/artist/5145f9b5-d7c4-4d30-a2f1-4d9cebf4c370.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 0x595e41cf89bbb8ec2bab4499e13a91a99d86ca071eed3ba02935d973ff224fca. 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/SE5AJ2101603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f2ab3d65d5202309733d9f9f065a0e26a50dbc76e1e18f02e181f58ee6c94. 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/SE5AJ2101551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9fe938eb7086de30dbec4a999cfccf0300983f1b96736ba8e9edb292fb90b. 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/QZFYY2448134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9fe938eb7086de30dbec4a999cfccf0300983f1b96736ba8e9edb292fb90b. 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/QZFYY2448134.
Eros, agape, philia - DJ Haydn Remix - Short Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6125038e942e5bf8bdda6775105fa3d199185b36da02733c0eb85c9db0d2c4d5. 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/SE6IX2400901.
Eros, agape, philia - DJ Haydn Remix - Long Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cb1b9f0ede08d04aeaef84c1d5e35b1223981156e4bfc85bb62452070e74c1. 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/SE6IX2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4b5928728ff05cc1c7e837321bc91f359e60295a44058d9004c106dc36d02c. 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/SEYOK1725552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04b916a1c9efd0bb05fe7fc7d66e3354f2cd5f6b685c27970c4948a5f52e191. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEYOK1725553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5579a093edc3661615d3fb7882a1afb17f8e68d21a307fda625128484ef40c. 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/SEYOK1725554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357d9cbb2ddd627a8b2fe4d9c0b71a666995b57c1c0a29b7224aa3e6c580d7f7. 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/SEYOK1725555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5552e79693963be69ebe5c03e0f6d282a337073e47b5c98de905f3336934a9d0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEYOK1725558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec65b13e10e2a86e660b37586a5bb3c3ee5c62dd72bd5099528c06dd6928e5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEYOK1725559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aff623da6abd92789f3de302d91c5c00980f5f17f3c74dc012397a93514c306. 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/QZS652116073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f03af177cf86373247ce927d98fb5e89260f6cf93faf364c3a9632a8164633a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES5702201892.