thumb|Lex Goudsmit in Citroentje met suiker (1973) Alexandre Joseph "Lex" Goudsmit (; 15 March 1913 – 10 December 1999) was a Dutch-Belgian actor. Goudsmit's father, a diamond worker, was Jewish and
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 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 0x6e33f8da98776ef051c7dd8babdecac85237a574b33b84840811d5fea0d456f3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff7a774-96d4-4f9e-bf77-2ee703f300e6.json and https://artists.proofprofile.net/proofs/artist/4ff7a774-96d4-4f9e-bf77-2ee703f300e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Jungle Book 2 Original Soundtrack (Dutch Version)
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 0x8b4cf5ce107afcfe86228e176ce4841c773e923fdd0f96ab0963a185d7aa59c0. 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/USWD10220448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee251471ec09496a873ca69e6d23785f225b9276841664c6a7e08b40a003e12d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USWD10526498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bbafd26112e4cc7e3250cafc6ea10def3d8629c0da96d7f7413648650202e8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USWD10526499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed633649bec956778d76a42158f0f0c494a8b61ba6cbb1656d87e7085c5a0010. 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/USWD10526500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4bdf42a41aa5193c21bb44287ce4c800a123b8a717aa23bb8fd212e59741d1. 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/USWD10526501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bde573572f3f6ff39ea51cb6864eb57dc560d6247e7334cdcb030f52c49e60. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWD10526502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07abed2dbd9ea9c67e5392f7ce4f06e7d46cddaf502c1d32ca26f26c9cf8033a. 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/USWD10526503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba97e43a4f0cc0dc7fd700163033ffb0c8e6132b158ba306294fa1c1e212f52. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USWD10526504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22048ce5ed73653d760f8df1d531ecc784e40e010c40e46ba3d7493f5e5331e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USWD10526506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b998d05fe137093d4ef2d9eea68972c1c8184d39da54d7bd7331c43c0c8a0. 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/USWD10525813.
Hoogtepunten Uit De Rotterdamse Opera Pol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb073ce015efa7ed13d3a42298e1098cdcb2d551f904ddbace84b24aad7b5aea7. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NLUM72201179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2e6913d752c8b5bce168ddff09114343eda2b05ac5990615ead38f81100f5c. 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/NLUM72201185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034d7921cd617c100efc5fe2f683663f83278c60c0a42a95ff808d61c67da67. 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/NLUM72201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522ede62bfe2d4b59cfa2855a81941c6a2f74d369a6bfe454f14805dcfab85d8. 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/NLUM72201225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e17ad63bf4d35e0b6ef5d18de3f5daf8a2771175660664dd42185171167800. 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/NLA521502172.