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 0x8042adfb70cec7762faa223efbeb2596c591b64c9b4e5a07f5d9615a6f0d57a7. 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/4bed3e9d-14d5-46a8-bbbe-48aac2b744d0.json and https://artists.proofprofile.net/proofs/artist/4bed3e9d-14d5-46a8-bbbe-48aac2b744d0.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 0x8199de4de611cffa24a5039c1a2b294f40485ee9d482c8b9f8d3168502874f7e. 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/UKXN22402973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a0176bbe5f7fa176a5d859d64b878e78a2591da6c2540e80d170b90626e923. 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/UKXN22402975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa330d85f343ebca001547db429ae98bab513dcfc21bf92db6ac3ece4269d062a. 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/UKXN22402979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ea132b7d0354e2dd5b8ee587343f2348756f7a0b047ff9075741961d475016. 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/UKXN22402980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9854ff4a8f6947f94130bd00b400d7b49aa8e7809adaf85442a92fe82bd8346d. 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/UKXN22402981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe1702b9c30904790a991314463fa9a07bf302641852cb70cf0c8352889658. 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/QZNWS2001247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d9dea3a0a6b12ba7496f8ea626ce485cd645e0635a7404709e8336f7f96da. 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/QZNWS2001248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6e54d8205107231dfd5a442e74887bf9b32e9b7ed139d44e5c669558f7cf82. 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/TCAEB1945740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d020452815e1ce303227bdfca4fe3c8d6cce4f57bb4888daf2cdbadee019a5. 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/TCAEB1945751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d908bc57117bbb447089640703c2e46e9969ec0ce7b5147eda195a3f3ba29a. 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/TCAEK1908221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eae3940c64237d646f129c8018e4b2e9afc40bb0740661efa4a2efc59d7ff0. 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/DGA082293004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98bac7d785fa511591cc6e545470a85a064c4bc77079e0ad19f09e7bfaad6e. 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/DGA082293006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067c576deb124de3b72150430d20952c3f861663b45a1186e6827f0970feb74c. 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/DGA082293007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c9d1ed014279d8f5325b2a1631d7d26bc2321a2a9b09e97e643d22342d1f0. 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/USZXT2351355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577074d20cf7ca963146d8cb977e4606005cf1180970fb92e07aa6b25a8b70e1. 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/USZXT2351365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e46633f3c214924cb60825c401c8ca07f2ce171346c9d8b43c48342c527981f. 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/USZXT2351368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76176c6e2cf5c2c698d95b8e8580b36e2ea4037e95aeab1738c71c2b9b228eba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB45A2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d5b14131540f6f490471ce29e408c931d8d1df8acca185b2eee9ed60c2d7eb. 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/GB2DY2200969.