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 0x954634e40c2c51ac9918575fc95eb590abca6591371b20cb6b7c7f98ffbfbbcf. 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/68ea1e1d-a71f-498e-82bb-764abcefdaa1.json and https://artists.proofprofile.net/proofs/artist/68ea1e1d-a71f-498e-82bb-764abcefdaa1.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 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 0xe5ba8888290b97e90ac748ecfe0b889bcd86708494adc2d81b992c3dcd11de9f. 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/NLSL51100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7001be907b6c3549d20cee7e8dfa163c26474117de5419c3232b13b85894800. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLSL51100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93217f9fd2036c2d7bbe2f67d7ca21b91012b30276def6039e65769d97cb2735. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLSL51400004.
Onder De Plak / Hallo Aardling, Breng Me Naar Uw Leider
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f0a84f8c7adaf17bbb31f909d00a78b8bdbc6aecc05a61baad6b9816455d90. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NLSL51500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e62c34821c52ca62a5c11d7967771781147878efbca41131296cf1704d92d21. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/NLSL51600002.
Ik Neem Mijn Tequila Altijd Met Een Korreltje Zout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1049fba4537c24c4a3270c615504d75c5c5918172b6fdf252ac16f2ac2674e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLSL52200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed75f7d55bbf43258a502ae4965f64963ca80f502cd4670ea5f7825fb60abb2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLSL52200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138dd3507b98121cd0fe490ab1894603a912cab1a2bc5cfd2eff841ae98fec1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLSL52500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f2738d5d05575705e4750ed3258bd6c69528418649dddff6f66be11560831. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLSL52500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52197fe46747e91c7976f5a0ac8ac46c0f442c5dd3f058e39d25901b3125b8be. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/NLSL52500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6507b0e94e7207c4e255d010e25874f0430d11f73e1861a666edd6663985551f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLSL52500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a0e981fbfa4f4c2a512d8ddbdff004658ce017cb1a858be92380ea24b19048. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLSL52500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba41616f0ac1e710cc837ac789507bb9f7e0088ce1f4c31cc0637d2db1de59. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NLSL52500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9033003e7005b50783e7763eb99b57a5f55c4598718cb345ac1f417dbc8b6120. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLSL52500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b08b462d302ba9488f8b30b65be2162efead268a44f5e2aa14b4d741704e472. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/NLSL52500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758e51a6200f1398cb091e1acaed6400e03035a251dc9d238f468030de298529. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLSL52500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc160d0053f767d44f15ba32116a12581a38cbf3fbdc9b45772c34f104767ccc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLSL52500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3a2273b10c98cf1d6ce400e6733ad1ca94aa1bbacc09b5903bc89368f48af3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLSL52500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee33ae8f4c4d8f75df79001508ef5b00f4e1d94e7eb2bf600b1b714115113370. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLSL52500017.
De Roel C. Verburg Coverband Live in Concert