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 0x7ef1c5b65c8c37aed415a9648055735b83ffbb2a2ffe89f4468ba86690ccadce. 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/b9062435-bebb-41ad-b759-6bc72f068386.json and https://artists.proofprofile.net/proofs/artist/b9062435-bebb-41ad-b759-6bc72f068386.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 0x3fa2caab5b97aff6ef275997d1656b769d1ef2749e2c6c24db00b17c9a9b0c2f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLE870662311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7dba198d11ba81c9bbffc09c3960765e6dc4cd468e00c8bf59490804ce1256. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NLE870662305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4290c1fb16e17a0c879a523b9b9cc7652583c102f7fb644cc9983e9f0b627385. 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/NLE870662312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afa172aaf91fa1170ce65398a02c9b3d811efb79e34ce5840aa7ff0ca1cd308. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLA240907563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5ec975f3c72cfe54b23bed13d568fdff819f8ca7e1e4784233da16159dc19d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NLA241007616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82ba1432d8afaec82681536cdaeb76392dfb30a3fc36a29b8efdbd732677543. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLA241007984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afa172aaf91fa1170ce65398a02c9b3d811efb79e34ce5840aa7ff0ca1cd308. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLA240907563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de1ed3347560bd502da59cf9b2e143f750a5b50b29eedb179a5a4f8168e74dd. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:50:47Z), 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/NLA241108224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b2dafc10cb646cde1e01550d5b262d60405cf38ea700beff9cf13b4628c74d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLA241208356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf0e90db4d7394b90235ff33edb1ae189b2ead2de45aee04a4aff398b0fcc47. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLA241208353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afa172aaf91fa1170ce65398a02c9b3d811efb79e34ce5840aa7ff0ca1cd308. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLA240907563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf85c7c46b943a1e7a1e89101bab8976332bec422dfe8eccc6418fa3b10f0527. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA241208346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fe1a37c22f4bae9a702cd6432e2de1d5c3b4566d80ec58ff1aa92918365f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:11Z), 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/NLA241208587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aac42cc1724ef610756fe132b12894ea7741bf3c6914e13cf53d155e61fbe42. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLA241300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039fa6fe57ea163b0f2994353315026368f50ac8cdff4168604788197fe150e6. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:07Z), 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/NLA6A1400039.
Hoe Zou Het Zijn Met De Kastelein (Carnaval Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f603f3b11ce4d287063c21739f910a0f965a654d1f1b887ee6ed23af84126d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:02:53Z), 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/NLH3L1500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c2d48298aa28b4984263e70ea2861ef842bff4649a0073b3f4b4eb382e8d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLX091701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac61a0343083848567b02c02a41f378cc10361b00477e654b38adca77ef9b6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLX091701006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f16cf34017037190b07105d6ec38706b9390485bcdd7d8d746546294a491f7c. 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/NLX091701009.
Geboren Om Met Je Te Vrijen (orkestband)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39e2928c8604aee7cc6aef3b9d057fd048b04126ff4245b284c71e611f2efc2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NLQ271700520.
Ik Wil Alles Met Je Delen (Dj Kicken Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d5e0acc669a7f21e7a2004082f3d614f43291b6d4a9e1aa9f1ccde51d60eae. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NLQ271800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150eaf96b3c110067683c7a085f532ac0e31328d4fcd9ce6f7da6939910801ca. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:20:19Z), 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/NLQ271700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b98e0becd8ee6b124f0d65a667069bd7dd421c510074fa35574e0efa97de2fe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:54Z), 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/NLQ272000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390cdc455f6039390ecf848d54a120a13dfa29ef0cbd000051acba48b67d596. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NLQ272100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f206fab32fb403f5675bed3f29ee984b6a0a8d74bf6f936f8baa3736a1adb93. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLQ272200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780a6f8ac2a3951b96cfd087adac047b70fb2efd77b66c44e193c9f7f4d49390. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NLQ272200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c2b10a54995d4d8284474f175903004723ca1de5052a357eda121ddb81d75f. 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/NLQ272200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94ec7137f2d4ac9b74a0f5aee4fc5e6ba1c549c34e2d70d825b4addc0d6f76. 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/NLA241208347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8346324a5b8257a64c01b16851ddaecd189206c1a9388cd6dde9d09b7a643bc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLQ272300018.
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