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 0x5e43a19702c9537b8de9179b8332dd6e5ecbb0adc466b89d84c73d33ed622f0a. 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/da60c914-a836-47d4-a761-6f07fece62f9.json and https://artists.proofprofile.net/proofs/artist/da60c914-a836-47d4-a761-6f07fece62f9.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 0x91e5ec35c9069b1455e67e7c6e0b67e76c651eb9a942cc8980a52d99839a5a54. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2385335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051977288371f6aa47690a95d3100f49e288e5f68658f845d24cd36f1f2b2d5d. 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/QZDQH2390834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4676f3064de1b28f238ee3ae323eac1134c426f5fb58fba278bfa444e40585e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJZ2390598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db31663a9155de196e236584546b267d1953025a4689e5489f7102253f9216e. 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/QZDQH2372343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f61a20d3699aff622b54cc6c9c1ac06527a06f6f39b5cf4b2eaa63049e75f0. 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/QZDQH2271506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0a6b2326847b842f29ab99ec706af8124cf6c8b22885befb58dafb3a2c0133. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZDQH2253576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6667ecb84e17ba6e2cb3ed26ea35b02205dd74fa448a37f189b126388ecbf77. 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/QZDQH2162747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896f8cb04554e257e7ad37386c038e0b9f23f2efe10b028a91bdc19acaf3e001. 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/QZDQH2267028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66edbe3751b0d27e9ab1342dce1ac0121b3d27c727de3d79156a32119a46b6a8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDQH2261762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f354371e62718f157c2a28d8d98b45a5b301c69f7135d5d58a8e1e239a5dcd. 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/QZDQH2512256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4412a0bbe4b9790f957d5758498bcdcbb0f83b77b8b2e288b734555a16b279. 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/QZDQH2504261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d318a6331c7dc56fb9f3323c457474a5c353e87ebc230a60a63d2ecc753683c. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZDQH2435846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d4ff0db25e54a9757ec9caefe1391904142ea91c27ff20738c6b244d0aea12. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2420929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fc051ae0ebf5602da39c586ba8234d3a11bbc00f6de2d9a370f662aea2122d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDQH2411879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b435b53469b373f6bd97a02f97103ce75dbd38c350a563ba9d09d5bea68a09f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2392549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb95e0ac6999c5a16aefb8cda825d48fa96c9fd5286347139d01d70deb67b4e0. 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/QZDQH2383895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e5ab5ddaf0026227be1c56ce904615afd1d5deeaa151becb27038fa8b7cbe1. 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/QZDQH2377831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7332038fab733087198c61ebcd9029fe2ce7f791b78948d06087fadc569e91f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDQH2374976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094da5da25efa2d2292c6f601eb38413bc2d202c50a8be7276a9c2185940cb7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2366221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0961a0858b7396b9e2e1507b5640bf2c2c48dc2ffcad2cd24590b4545c534bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDQH2360897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093a89d39eded8cd523ce3940bb9bf0b28c6b6bb27f7931224639fdc03784cf9. 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/QZDQH2351137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379496093b4438b2e27daaace059d4965c1b6141c4065fe082e8897a5973199c. 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/QZDQH2269924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd6ce3736606fdb3b86f1d86f5adb2b5669f966e0d31480709ad393dc865db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2264705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66edbe3751b0d27e9ab1342dce1ac0121b3d27c727de3d79156a32119a46b6a8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZDQH2261762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0a6b2326847b842f29ab99ec706af8124cf6c8b22885befb58dafb3a2c0133. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDQH2253576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b3aa45cf6a015595e69b402dc1465190bd16d5585e1597df54df081c21fa06. 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/QZDQH2160927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4411a7f2a02a3154a4444402f2557d21fa44288c6a10c9d0308a8f08113720eb. 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/QZDQH2158509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c1214026d1aea352a8a2a7b3deb3cbf9dec9d37a37408c9cf8a2cd81567d29. 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/QZDQH2154317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619c7e1f2241486feec78fd51d8029002c8bf647b49afbb11aef2c2e56fa2aad. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGLM2195688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e11a353b12fc6471b2779db013d7b5bc81c0661540c8ba562eec8a5c92f3db1. 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/QZDQH2414980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffeffaf7bd1e03fe03bfd6eb9b4d83767dc2f6ac65b34dfb513877f5c9ab429. 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/QZDQH2414984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f835e08562a89072033592a78a882c0ece99d81e2d543c106269cf1f15088d4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDQH2414986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93649585dc48f779fec1734916f10990dac99df723436246c9af0cf0587489. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZDQH2414988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0feb04d598748aea65a881fc3b7bfacefa495359bf2a3303f88b01d929870a0. 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/QZDQH2414989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ba0965c7815827a578f1848a98c2fbba17c5bb50a0ace51f1feaf35deb4569. 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/QZDQH2157137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025329dcc83040a3408e19c56953b1f5d818f3ad25afbc0b2b9ceadc29aab1b6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZDQH2157139.