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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b9fb60f0856c3b1940882603e7e868d80bce95b22779c02f39ef50bac472f. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cac3fc8a-af2d-41e7-8368-cfaffe85567c.json and https://artists.proofprofile.net/proofs/artist/cac3fc8a-af2d-41e7-8368-cfaffe85567c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
God Wijst De Weg: Instrumentaal Kerkconcert
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de2fdf04a6ea0f02181c12ffe375e21ad0f34d50ffcb5be88ddeafd13ea8ca3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLG620611710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffca12d362374ceb88ed6f87ae804d0d3e06b24e13422b95e767acc16309d990. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLG620611711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92001e4db817bcba21f83720d4c021e893eee5f2abd5d1cfd01720c7a818d944. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLG620611713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b0fbff3eab0f79c3e83fe6671b1e8452e894bb932a66a81c217dce19cb970. 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/NLG620611718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5971d6ccef5acb0da95eafc30bf8affc8069c08d8aff466957ba75d001790d34. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLG620611720.
Wees stil voor het aangezicht van God - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f605a33f0c7213d7740115736ded4907e426c45037ed1c905d2edc5aec47d22. 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/NLG620611704.
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 0xdb4490ed2cb2c53399ee316d9c42a9510d4ef307f0c8ee021bdbd9813b8d4977. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLG620611705.
De Heerheeft mij gezien en onverwacht - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57ab7282fd20e15c4552eec57f04458569e0d6a487f12adcd62d9853ccc412e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/NLG620611706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e42f1f051e9cbe225a41874a5eee707c337434c9a13f6cc7325122d11b116d7. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLG620611707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d66b64194d6ad7e16d9ce38cc1f6bf09b46fe053758b3221a13cfe80b643a46. 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/NLG620611708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd529d9467562ee7d9df661f48627eaedcee239d627494cc9fc22e93a1c3ef3b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLG620611709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9b837c8f0697c4e9125e58a6287ad98a2c2263500cdd3ce69a60c92b258c9. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NLG620611712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73db44f16587f89b03b563e6ffdcb58e144ae3c89b7bfa3d252eeb70852ef25. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLG620611714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9050f3ceca2a739e443c4aaa0ce15264d22b6c8455838b700d25477a3d46028e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLG620611715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385e3d91fb09c9a4f27aaed3e7b6ef620de28e1c3b824de205f84bdc63194bff. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLG620611716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848881357f36d54f44727613e36126fad37f1050b71bfee9b22e9c2a0464b9c9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NLG620611717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748f4ad43a36fdc6af0f1be6321ce877988f113e5c52072fee69572d4e7cc900. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/NLG620611719.