{"copyright_id":"0xf634d41ddc5f8adf8ccdecc925ee3ed90b1ed85b5e4fa0f8edfad327d83cedce","name":"Samenzangkerkkoor Haëzerkerk","registered_at":"2026-06-20T17:02:55Z","symbol":"NIM1661400","token_address":"0x6f80b9d57a8b6530cb9ddb634df22bf6506be0b3","type":"artist","uuid":"bbb5eb3b-7a65-4156-b529-a13a50f6e2a0"}
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 0xf634d41ddc5f8adf8ccdecc925ee3ed90b1ed85b5e4fa0f8edfad327d83cedce. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbb5eb3b-7a65-4156-b529-a13a50f6e2a0.json and https://artists.proofprofile.net/proofs/artist/bbb5eb3b-7a65-4156-b529-a13a50f6e2a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Samenzang met bovenstem - Eben Haëzerkerk Apeldoorn
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 0x2a8292f3328df754c2484eef02511144ceb7557012020a474b1efd70158929a8. 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/NLG620612813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0569f87a31c167a4f53cdb75cbb1cc588dba6097c55a191b3effe50576b43b0b. 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/NLG620612816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7079839207abdb4167d278ff4ff45aa00fb3db8389dbb8a4f5c7715da56baf2f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLG620612821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4bf735e51edb0a4b4c8d3ab3c97c54defdbe445b4a902f2131b1f8325a83f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLG620612809.
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 0xa1131c53949231f93918f5703d6434b6355aa9aac595318bfcc4aea60f11d023. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLG620612810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f57b95f16dce63d7887b0c6f8a641925d0ea9047a4aa23781faacd223e34b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLG620612812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4babb49a9a2dad6fd2753e44dc8b75ba095d9d330820da5063d4671a7332daed. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLG620612815.
'k Wil U, o God, mijn dank betalen (Gez. 280)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5584d6b5237b27b3150967110bc167f934e623a559cbb79d0a3751ae3f361. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLG620612822.