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 0x152067c7d6bad0316dcbbaaa719f3ff57a640094b7b35597219c2e911c1dfdef. 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/a03ef9e7-31ad-499c-8924-47223589948d.json and https://artists.proofprofile.net/proofs/artist/a03ef9e7-31ad-499c-8924-47223589948d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De grootste successen van het Noorder Bar Trio
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 0x23efabd77458f1b9b9dd0bbe10ecbce07b00dd64240756f5fd0cc6b3288d2b09. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:58Z), 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/NLA521403678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3207d006c5922d411870b83a7d37c53086a53df9eb279cd0bfb127b812a8f59. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLA521403679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460d9780a60ad21444700be1dc7f61b1f69f27a1daa4732522bf41a7e33585c5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA521403681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52965c653fc42071bd4047506654883a83f4eacdebda963d9999244a96d10c4. 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/NLA521403682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde83657d23795d46d55cdb69af74d5f8f3151f8c086fd1d39ef6e25ba6cb0561. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLA521403684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b287d7f7909492f6eb97ed5b87ebe22d83f0be249e49a6cd4203f8ec770a79. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:44Z), 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/NLA521403685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebb2c81f77f055dbfe13a30833c41b00b0dbc8a50728bc6c364d15b025c2a1d. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NLA521403690.