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 0x0ca4ee1dfd5419c24ebf86ac2cffeb67a78ab6adbae9f2b39abe91596d9ca1ad. 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/d308a5f1-c7cf-4425-b75a-dce32d41f01f.json and https://artists.proofprofile.net/proofs/artist/d308a5f1-c7cf-4425-b75a-dce32d41f01f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e1bc18c8f0a6e171f7e9defe8908d9b5c80ae70ed778e34e8b4eabbc69986. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOFGG2102000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d401b4935d09b61c27e0bbefd99e22b3079dbccd2630846a104a082d76b0a73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOFGG2102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05c2ef48cb793504ff98cc12f2284ba7d74ff0a76a0d265500180c66174bd9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOFGG2102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b1be0ba548fa0bc9c496b180b63b4b081ce618b5dc511cfbc4a4c089eff96a. 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/NOFGG2102080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830b85f416841a72fb7a9fbbbf8ddea56f7d0e9f7d4e73ebd5449d437669386. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOAGJ2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82936c3a4affa288fdaa496d1c8f9a369cb382de5f82a9e09b1e06000493a8. 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/NOFGG2189400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2215b5f98b10db4a68ae4511411a3f2cc3a4d36c863746ad2a9d476ef8cdc29. 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/NOPGM2118010.
Møtested - en hyllest til Anne Grete Preus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830b85f416841a72fb7a9fbbbf8ddea56f7d0e9f7d4e73ebd5449d437669386. Chain 2 (Bitcoin): anchored in block 956970 (2026-07-07T00:37:51Z), 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/NOAGJ2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2215b5f98b10db4a68ae4511411a3f2cc3a4d36c863746ad2a9d476ef8cdc29. 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/NOPGM2118010.