{"copyright_id":"0xe624f47fdccc8c91c3cf84a77d40402d97af046fc08ee2c5d351bdaa7f1010cf","name":"Jeroen De Rijk","registered_at":"2026-06-20T08:45:25Z","symbol":"NIM1570228","token_address":"0xb9698bcbf38fcd0e7f2be766eba4dac79fd1d7cc","type":"artist","uuid":"a8e2d31e-f7a4-44a5-afa2-98becbcc7da6"}
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 0xe624f47fdccc8c91c3cf84a77d40402d97af046fc08ee2c5d351bdaa7f1010cf. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8e2d31e-f7a4-44a5-afa2-98becbcc7da6.json and https://artists.proofprofile.net/proofs/artist/a8e2d31e-f7a4-44a5-afa2-98becbcc7da6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x895e990516052e1d8ab7778ba7a7b270631da7712ee7e1b1212e81d343a38660. 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/NLD660600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f02b2cc8e63743324fdea874e4e71304dabdb291dc836a1470b34df01f8a84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLD660600089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12d281e8a90230d32ee095447899cc396562173f3089aa8cf522f2458acfe42. 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/NLD660600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf451d2fdf5ec8bb447be353817dd7ed6a9267683714e06d1cdb0a050953a42ae. 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/NLD660600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af7825b34d8a20935aae33933be32af8a364f3ee71cb5dc2f213dc81498b487. 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/NLD660600085.
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 0x7b4e3f7e0692653cef28225991c9842b09d118d2e6fc86e26c9f04f672b4092a. 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/NLD660600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c21a89a71ecc7c4062f0bcf6e4ce34d5671c9e486a21b866932fde376b5ea2e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLD660600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbca91ad2c7d8cb967affb2d728b859de4965816b8f5894aaea9da28e2c45929. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLD660600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2af586d03087e93a03ad479429e6956d0efad434f3f4992c47159fde58b7193. 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/NLD660600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514ad8d2785a049a5422549697bd4a1e65a17eaf66c4ab37e637b3a76a0cbe3. 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/NLD660600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e61adfab22ca4646984111e1482b80cf4906aa9ccd2755cafe857626cec29c. 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/NLD660600095.