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 0x079369b5146b25e80405d802f249ecae6855d0afc699082c097f178529b7abdd. 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/f6277b27-049d-44cd-948b-f3cef6a64ad9.json and https://artists.proofprofile.net/proofs/artist/f6277b27-049d-44cd-948b-f3cef6a64ad9.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 0x7876ba3f9544e7f45975a42aa4afd7a550c9041e72f3b9903e5d55c84e2a7ac4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/INH512016101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b64827f2a611638f443fb74af76935a9a60c52a05b6089601b64e0e4e25fa5. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/INH512016096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0838043a3143075b2f6d1942c81a73766aad56ab415c82e52a4d131ccc427e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INH512016088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2f537bd8f6128cfea6c9fa641df6ec2a658f9e78afaea1d8558ed628a39bee. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/INH512016090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae28ae0d81ecf0d2ece923ef07497d94bfa82b2f841a92b5ae253a2edcf23629. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/INH512016087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bbb9e11b3e4be90f30bf764c98a71b8afe3b66b8d151c1bac81fdf0b9dc923. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INH512015100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75debb137bc5b3c2e0f22ba83ed66ea2f8372fd1b31c3b7e41ccf59b4e923e23. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INH512016224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a0d8383e08fe1a0ee3bb124267f983b76696313b73f62b95fc0dbae7fee56. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/INH512016932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088be31dfbe24f39075e16ebc3834d66230cc51229818af6e12774e52148627. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FR2X42472877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f78ed3b9b00498df2ac773cbd0c75a7b26b96c18b37349fa012e3b80b43fa7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR96X2418274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c5b06d128ab0e5bb8238fc999b80ad2f933eb40ac336ff64e98dd19accf690. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR96X2423564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2ebf6adc57282762edc494bacfbf5cb608062e702475c523e8c641162b16b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DGA082464686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ac2dc6b7861bedb52765e6177825584cb96a7adbc5021f796e0c6988d5d44c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA0S2433236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6082e70ac49374f7896eef4166f09bd17d90c94c686d8e825414fdf898ab4b6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/INS922500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3557b50e53996b54e6f93d213fd7fd75efedfd7672fee69f5be93b28d40c75. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/FR10S2545524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6866be52718045ce9f8ad94238f00bf24aed71bee5f24a83a2d1fde6efaab9. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CHF032514612.