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 0xe70416f395ed0bc1d6730eaec82384782367baa5c26ce31ecbaafcd4450bbfe0. 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/6848b724-4210-4d32-85ee-6cc47b203859.json and https://artists.proofprofile.net/proofs/artist/6848b724-4210-4d32-85ee-6cc47b203859.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 0xb043afb01b2ac3b21afdd5312ec60b7e3739bee5923fb91bd31c2e8bd9f66393. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM2PV1662566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb998546850be170a8542678929d3ea6893fec6a847714508ac0dc8f5f053db. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM91640508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9562b707a1f31f0116a00ecd9798092cf8976dff8afa695e5aedaa7926a205bb. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/IDA182132031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd0bbaf53662d2ff19cd540edd22f1ee29cb6acc7ce7e4ff6ff11b9200421d0. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/IDA182031066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5df811248266eacf0ad66eeaa31df0ab78da1496be9c7bc69a447b4775821e. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/IDA182234106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78153c6b182c97592be3091fc8377b76fce19e1b8f30a98d5a1fbe6743790dbd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDA182334589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841cdd29c0124b4e5a75145971af7add120f8383bf6f66972ab61f981a67e01. 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/IDA182335299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa096acad50e901ddc7c104b4a661351458c572c0e72ae4bedf07f98269cd5f10. 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/IDA182334641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78153c6b182c97592be3091fc8377b76fce19e1b8f30a98d5a1fbe6743790dbd. 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/IDA182334589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f363c0f24dce8b3262b8afc3cc43290da1439c7fc3ac9bd888881a36311670. 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/IDA182335300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2188ce71e0b13809d2b40246d4da49dbfa799c0273d1cf9abc74542d68573a3d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IDA182335301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af973b38b72a3abacf18f728df6ae3695ced2ad665c6cb5d015fcbd8abcaec1. 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/IDA182335302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea31f1bf1e07934dd014e5003aef55a7087499ebe44ef07721b288e84617462. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/IDA182335303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553f09b9d65b0de36fa6cefad936e0c6495cda1f52ea569dfe866972e0b9b0b. 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/IDA182335304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c40f7521883c8c77db8b9df85c144fd6c8cdf43d7f5952f8b1d8d317d74eb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IDA182335305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf8ef4a34ad8ab5053525fa06a2c6cd4e483f294f9c03413cc0f51f784dc747. 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/IDA182335306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa096acad50e901ddc7c104b4a661351458c572c0e72ae4bedf07f98269cd5f10. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA182334641.