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 0xaf6f8dfe5a69e1fef80c3ad9e6b6345bfdcc27195f649ac904d28d786ac74ab1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f797984f-2736-4d0b-8749-d27986d92642.json and https://artists.proofprofile.net/proofs/artist/f797984f-2736-4d0b-8749-d27986d92642.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 0xfd6e83db6741430f2a6362690f8bdd3ad197e83c765676ea82ba0497b33e472d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKRNU2100875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611eb1d4e306e9d58c015b56357e50eae0ea5b43ef24cd0d6f4c6ddc2de024b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKRNU2100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635114fc3164048f2d46f9dd2799a9605145926419809c3ef1044e74dd03a21. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKRNU2100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200d7904323b37d03a0a365a51ae458fdfadfaf6ac239a4925c268f49ed1c921. 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/UKRNU2100874.
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 0x821a8d6b1f46f610cee16c75a5c745fa30c32f15a597f57ffd68561b51480067. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UKRNU2100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b067f04cac7c3dadabdc5ea7102c6fe016657c9d028a540f470c52088f1a4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKRNU2100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d94826e7d4f236bc2a06fae63d112fb631244981d5ad2f85b7d3c99ee9cf9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/UKRNU2100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7496c5e997c60ce97d598748c472ae0f1fbd4026f825db3860fdd47f8a3d73b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKRNU2100658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448a0e713f882c5fb8ca589a0986f95c21b0df413ab8a8cec5f8cf3dc74900b2. 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/UKRNU2100659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe515b60b4f865d24c3ab4aedc28ee53d13e9b1ddf2d87dfe7ba9771b346cd497. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKRNU2100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6ff28648e188110596c2cac791517a3f77e1cb4501a92668845b5d524cc8b3. 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/UKRNU2100663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3818923a3d0f8088696115011618ff86ae3c42d59c8064e3a023e1c6cd291385. 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/UKRNU2100666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc7f292230bf0d7959143467567668539b8747f8ccf166670b5280b56fadc9e. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/UKRNU2100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1acbf7d29949a4b382ddb31d0110b4b983e490db3edda3ea3a03816bcb083f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKRNU2100662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16169fae15bc6ba8bc382cf3c7db24d2e94f61a97bbec7a752656e0e269a233. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/UKRNU2100664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4876283b58287392c0f184c6fdc39fc03bea96b08700ce119318865a5ecb9ffc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKRNU2100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cca534b98d884ccc405b8f0e13ee13fae19944e3f3875b4c035cffdd8def7d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/UKRNU2100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4841f3e185c14e46e0f77271179c2fa45d84356e178cc4aa3338795e05660. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKRNU1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14536d8674878a450defa1a7aec159874cbd03eeab6563106f7e1a7d1ef8573. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKRNU1900275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b4a7d6d12a97adefecf7b71b728177cfae9a584947d48cc8a37e8815a71d52. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKRNU1900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205a23387a3ae9699bae2a9e2fc0d1843429ca4fdd5ab32ecfb2e09128760bd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKRNU1900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca58ee2c11977b21bf14b6eca2d455058e84d0df1b2c96e57776504606e09a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKRNU1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da31b9588b60ca83e8b9d590648ea78d5b8dd774f739bffea4a2b158cd29ace. 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/UKRNU1900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392645a395390575393d2da67b9abe0ded3f648f8180d7f3b96a53448b6ffab2. 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/UKRNU1900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5bcf9ad4d1567fd8c490b06c0b9bb67c270abcb1a2b01b105fb4fda344d9f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UKRNU1900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ac752d3401c2325748572bfdf110b35f665b8a3789a54ff046709a34a7bcf. 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/UKRNU1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6b7ea9f2210bf85657dace111ffd3792f1279ae516b9de47340c9d04d6171d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKRNU1900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3146c39e3845580f079a1c1c61cec6e0dee4ad0dc126f5e15daba2d23450fad2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/UKRNU1900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf7ed0156da6cc44b1de094e8f5f31ebae0d6a752d38adbf24d1069e92dace. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UKRNU1900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc549fc25a0e3e2f0cd50e4693178a384583f5e604b80ff7dd64b674127d999. 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/GBHLW1704083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb126387fb825fe59d01d5d8e14505398b9e6d6fe8b270568c94b4b70ff7187. 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/GBHLW1704085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd845fb89a87fc86f1a85ed803677eca7584a3a4fc7369acd86f7470b0d4ef31a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBHLW1704081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791a2e33bdeee7c4a1621cee6da9234a8474f705cc91e02e7abd8c027c726c6b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBHLW1704082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76b54ac11545bac824617ab84e13b315d03aee12ef62d0357e4a7268a4c3927. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBHLW1704084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1968cc76907311d66dad913b88cab1f266302562fb07d6d47290efe8e083ae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBHLW1704086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86975986d94be279897c3fb35b0814cbfd0ebeca38939b6fd396f8dc56e4f09e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBHLW1704087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fcab7036ce0b69479145014c38fc0676cae53ab63c0e26723880b6aa78f39c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBHLW1704088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5176da6896b494c8ac8de7f87f4cddaad44cb2d3ee0e3d14307a2d4a901b22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ62240049.