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 0xb78c5df0a208f079710844c6a7ccf58046f815279dab677ac65cb516c12e0b7c. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dfaf0d3-0f7f-4119-ba3d-80304caeb8b6.json and https://artists.proofprofile.net/proofs/artist/0dfaf0d3-0f7f-4119-ba3d-80304caeb8b6.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 0x638b1c751b9e49acff0701b61c8a4ef9dc136f5f669c09936d200c752d66504f. 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/QZES62261510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1fc7dc172b2cfdd42444bb3bdef502c5723a8aa27a088903919ca37be1a07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZPLR2003365.
Odun (Tdurst Amapiano Reimagined (Christmas vibe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e097007bc19263408367905b0d2d5237e32425fe8eab0889169fd66d2fe9e23. 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/QZNWU2196536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd65ef6b5aeaf33e6dcbf4fca9a46b10e5e4aa67523bd4184d1f8e6234dce9b. 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/QZMEQ2114888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95023fc6505304408f4076af094fa08244dc1388c2cd7f99cc3e40888ede4b72. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTAX2480878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0acfc63edf829cd93ace979512fdae4094fad8b09d40e71ba09fe7c998ce5d9. 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/QZDA62426707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f96411ed30ff6fa7c2ce46690758ac198f81aa4fab1088269d4bde201e8d9a5. 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/QZK6Q2359348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973d1dc831609ac0f26b395228eaf5d18071300c74c15ee6ebd6570305a81eaa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTB82227105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d07110e3864d00491d9c15224b023f996fd82034d8415932962ca4a30c1250. 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/QZTB82252408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb87f125cdb2e73780068f6fa9e3621c9c786d1dc75f041aa63c8e2b06e2cbf4. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6F2218717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acaa905530421d54062d55b9dafb5588a24c540dd6d869a4560bea48d06ce19. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLFP2279691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00036f0dcc7676efc9ac182406f9619f8a24e5365c3f74e0cf7403141503bb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ42225029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef075667bed03f7eb447b01bb8d86d9fdcc5e7e63937c351567ae5ede345653. 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/QZNWU2184721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23f83a099e7e9d6ae2ece6f33ca605f7f7cac359e9416418a3e5e99902f7cbd. 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/QZNWS2096052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5579e000194dd749364d5c7eb7876b122df5bf799ff3e0e5e5bcaa1c8f34c. 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/QZK6P2092852.