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 0xc887fec7191589cfc3342eae8a27e7fb5af3ef525c2976c8750c02e5820e633a. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f797df1-332d-46dd-acff-3d7206d3a1df.json and https://artists.proofprofile.net/proofs/artist/1f797df1-332d-46dd-acff-3d7206d3a1df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stil tot God | 50 jaar Chr. Urker Visserskoor 'Crescendo'
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 0xa6ad2a5f464532ed8c363c7dc9f8deb10c2a1bb402692873e005e4b137445539. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLCQ61542917.
Verwachtend Uitzien (Live Vanuit De Bovenkerk Te Kampen)
Als De Storm Voorbijgaat... (Live Bovenkerk Kampen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb28d8830744383b140411ef9a1e3b1ce0f112e9bd0313c50a826df3198b67. 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/NLCQ62342904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f65f541686cd98f731ce3b51bb6a7a4520911dab146e8f3337bd301588b038. 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/NLCQ62342909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489402f4efee45cc661f72b3828f12480a34b0b6bdf344e9064c833711c2b06d. 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/NLCQ62342910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2ec0c1ead54ed4206fc0efe6457cfd09d3b79c0ff11b6db731eddc2594675. 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/NLCQ62342917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e44df2a9107df07dd9693c2690252115a621f171f2800bb0d8027e59d6b25a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLCQ62342901.
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 0xecfd165521511bc60e9c829a3e509b4eaf2bc28dd54b2f06420bd011056de89c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLCQ62342902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f3b7878ffc2fe4d5c6767f990dd5288c2e3d8d7393de565db2719a88a0eb7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLCQ62342903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f911506cc518efc41fd3c4cd865c05f73ba1a868f57a97e5a787da6db9050d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLCQ62342905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff6a33195cc185e7478a03a0503f161c51f4f1f68ca11c21fd55f8f567106e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLCQ62342906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2acf242f6ec09f65a00f4c8a77241aa0fea86f1d27ae2258ea144f363f8a547. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLCQ62342907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ee4b8439086e5f77ee0cef6571bb03f34cbf1a896f9d377678874ebb758386. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLCQ62342908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e3981f8e01f0993c5d7956917f89a4db6dbfb8b630e18c805808bfe977104. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLCQ62342912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e55ee4941beefcba9f49ea3f9caea89cde1679ef2182622a75c9aa9416ac1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLCQ62342913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38770765f260e9e94c01c622cd350d252f37040249abf998fa8ed2cfd5f4cad5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCQ62342914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f65c3fd6969d321e3cb30804e88c70be4a640b1c42de95b24d82161420252e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLCQ62342915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d1df80e35a2601699d105b051c863ae7c3f3c8515b96a088fee711b3c35e1. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLCQ62342916.