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 0x30cb3a4f808b8a7a8409ff841f75d71cded8a4504cc8b1e8db6d82955cedd37d. 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/ed4503c7-d65b-4f76-b83a-4d17bf65155c.json and https://artists.proofprofile.net/proofs/artist/ed4503c7-d65b-4f76-b83a-4d17bf65155c.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 0x7b6b883442c252593af63df8b8b5894bca3c5c6aa5e73bf1323566c88e51b967. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCAEJ1911158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c8c6fc68f4fa48b7d803aec7be93aa4128188d3e98857d3200561f08f79a0. 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/TCAFC2065422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c85dcb79bb53fe57aece9277c6ebd388cf358c39994f47179505324a1ac661. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAFC2065451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2b0e003f6190176adce6c223518f408ceaf14741ff0219c1d8085ad5cb7b39. 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/CH6541669816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53defedcc6850ed6956a9df5c71a5fb052841b5c48612334619ff3ffaa5ebe0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CH6542119242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c542cae79bb30bff07167c5dfb32481339285bc7865bf2a645764248291515. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542119244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1429d9fbfcf5cf076baa76e11c06efdc9ebf93f0ab2095163c2354735c342. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH6542119247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eac631c3ee244dbbf62e85daa66ba5a5fedd5b0e82d694bc76b07f6c4f058a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CH6542119248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a05563814df86c65cb04908a8f168326c89901b017c59724c642d629229c3. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/TCAGS2351442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fac7932230ffa1007c3e1450a3e9c5af54ce4cdb1b55e9c3db355f52a52abba. 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/TCAGY2324569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8766a5b2148443a036226c4429b70a55670cd61c1ad97d911422bdec6f664d96. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/TCAHC2353914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296759234d0533042f5406eb998be702fa141bdd3fd18cdf5f1f8d5905ea799. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHG2312998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4837c4cb5c7956ceb8b54a40da965774c41ee5bcf8211bf738c5f8a8b13a6d. 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/TCAIC2431182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e216c5e3fe9b606ec1e19bcf2d80cee56f12c3de3f43d6d63486487c1a92144. 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/TCAIY2437819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9d920a7662f6fc2e584b312d6a6445322e9b75fff5e38e5b1f57b5e3a23bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJW2527617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf431d2a55c12f4cc001d01fedf70bf40108f7751e4c0a45114b15bcdc716e06. 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/QT65Z2553031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8cd57e364feca2e3a08e5363a94e99e556561eb367345388d03d541bed012. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6622554501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df4f9b998e0a38bb7b9dd4d4bd3c2a5b90f432af574c8ed08434816347178a9. 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/QT6622550833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce022c5a9131e0375fb57ab9630e302b5684aa94957456ceafe0210767146e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT6632545706.