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 0x9dd41eb870b9b360d6f2dca0dece2f02704f301cbbc0eaccf1c2a24a641f76f2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e97347f4-daf9-4c3f-b9b2-a5128953fbb4.json and https://artists.proofprofile.net/proofs/artist/e97347f4-daf9-4c3f-b9b2-a5128953fbb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
30 Jaar DVS (De Christelijke Drum en Showfanfare Door Vriendschap Sterk uit Katwijk aan Zee)
50 Jaar DVS (Tamboer en Pijpercorps Katwijk aan Zee) [Live]
Church Chorals (Nieuwe Kerk Katwijk) [Live]
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 0xf9b153bcda2a7a7d8fafdeccaed1ef78c257450e1bb135e8f709e9d8f1f34285. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:48Z), 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/USL4R2229021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b856863e261b5e1b9625817435de89a4483bb6216ca15e69cedd5173e51609. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:44:27Z), 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/USL4R2229025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6604160608c972a3c8d9e985e2944cf6fd0edd3934f162b8f91c03803e3e62. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLL6R2300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f36ed1139ef1c1001fb2d00343c8cea41c3dc1a2a2b43541e3db99cd17a3ce. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NLL6R2300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa63c2454b421f2bdb3cbffbdc9a899f15f6791953eb5580c4c565ce962b968. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLL6R2300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942d157cedc84c9383ef11d82abb6caafc308cd4c3c69faf5373c8947d0a3a24. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLL6R2300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab2fc5522e57a8cd32e10514675ce3de45801e035bd3e75564d2cffa5d4a54f. 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/NLL6R2300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33abaa5b4f0fd48f130b7982dee4c943336443af84ca7d45f323f74f40a1ce42. 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/NLL6R2300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5e7dd539afda6020a716c2619c18fc80496bfa976847c9e70c1fac339efb56. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4R2320922.
Boy Band Medley: Shine / Picture Of You / How Deep Is Your Love / Everybody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5186986a435a6c132433cba5e85c4f17cb6308bda1c4233e2c5d3e3be6751ea3. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:33:16Z), 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/USL4R2320924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424d7fa828f5838e2e55c54309177a721ddc10922afd2fe201da9281739e44e3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USL4R2320928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe370adcaab03898ebc2057ccb06356c7cf6fad21035d15563c909109418bbfa4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX9P2351671.