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 0xec548e5192303ada438acb360c1fdd54e7bf6a6d62f9d2b7af44c83515466926. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/924c7892-e798-451e-a06e-d38734e066db.json and https://artists.proofprofile.net/proofs/artist/924c7892-e798-451e-a06e-d38734e066db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Klein, Klein Jongetje (Als Je Groot Bent) [Remix]
Klein, Klein Jongetje (Als Je Groot Bent) - Remix
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 0x85e92b78fd87febe6821df83988bf9c082b37a136c8447aaee19704496ba5203. 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/NLG662200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f931c91e37122acac08b90c993b19dc907792f1f3a544bca666125bf8bdc87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7428b76b5041d8bc19005897f07bf4cc111f0f0d97be506c759f892d7e10f3d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c437464891bff88549a87b9d36f7c6d6650580d9f5cfe9cb3e08060ce9f256. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG661600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4675874a12e711366dbbfdd25e594b870277ff0acbba14d781d6af51d6c4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG661900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83d1abbd9834d458c9d5a38ed1a9d3eb3a7c410675d4b0b33075f62f36701ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLS241800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb5c016b235871eb4c6ff011362e40725863c495a4d524bc632832273872a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661801012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefca7262bc250e2614f3683066e2800b564cb1168ebc416f79692a621a6da9c4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b715070c3db536f3fc6654eac1710f1482c8131c56642d106156263cd0a79db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLX1N2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6b59f70f9f4318896ab89bba0fedbc7b09e732ee2363465b68b0197ec0fa6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLBW52200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc23ac9a422da6baf125c31b3e95dee9164e3835b61932fe1319a58ae44cffd8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661700930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596d0ebdaadd609e6cb739112e09b72879e3c8a9f4b1fc823208ecb96735f4c4. 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/NL3GQ2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d346a4d7e39228224b630753f5aeae14500d85dccca871147e9e44dab1aa50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLS5K1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7980739ce37707aa4727b564bbba9aeddfa2dcbe20750feb388e354b1052aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLY9D2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7980739ce37707aa4727b564bbba9aeddfa2dcbe20750feb388e354b1052aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLY9D2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3d9ef84ad6bd9c2da29c95bad42bba5b9acf55d130b33c68dd92d3f5f17594. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLG661400682.
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