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 0x522744d33ab5ecebcbb3bf16b2811c93cbe9f0513b8da25a8a0ad10833cb868b. 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/9166fb02-b408-4eec-965a-09cc9be8984f.json and https://artists.proofprofile.net/proofs/artist/9166fb02-b408-4eec-965a-09cc9be8984f.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 0xcf40ea59a2d6a6d69ab7bf52b8d7a966c3b6f75774f5f8cbb2461b2ad2c4e795. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMT2077047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5cd501fd9e99a737ec0fdba3d3f4357a0ec3df4bd326724a2ee2a0fe261b9c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNMU2048298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe640107de00cea4e1b7124c6900913fb776f58546b35e45d904cb8055f875a40. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:18:48Z), 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/QZNMV2051529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c20745d6f0bb38e8042a75d751652be75c811c13ebfafc4475c105c238f6f3. 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/QZJG52110127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fcec484435263d6b61ecaaefdd1a06fd405ae641068a29f0960e144fff3930. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNMW2108271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2706ac50a5f1907ec49d74c2dfbc1efb2b135d611d63f4a89725a9935238b13. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZLBC2100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfd92f2d4013aef2fb6245816a51710dc557aca06c7b3f39568c2cc9b942ec. 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/QMDA62135848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f2ed0eac9733c825c4f6aa2df519d0f110d6c8852cc451eadc442aeeeb4887. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2P2228792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4b8287fcc5373e0993afe125b8019bf88abbdfc55cb8e02462c89c22b8f80e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:49Z), 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/QZNMW2336984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c84098528f3cce53800cd3132adf164cebcdfaef1fde6a7a1fc325b7291392. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91760777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf957e2e8c6032ab771b1ed32900871155c1f136408786b529f7682e956ccd9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USLD91764059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b0ab1602772b5bc9c29d04ba608b1dcb1e4fd1cce575c37803b2ef4a91cd1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:03Z), 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/USLD91770910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eee1a5c3727cf1b8fc88dceb61a2d54c9a997ea16c67cba69abdb8d01491df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91771927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce924fc86d8801c8097f6de51c6abd48e9c2a2b6625929d8c5f1976f3bdf2f4b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USLD91773849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42990cee1d94ca3db659da32a6cfe54e5d26de467706cbf12b1b6845b4da7701. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91773850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dc52bb3782eef1f452b3731e0ecdbbf850ab4757cbcebe818a2518564d2188. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91773851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8ab53e254761cca4d894623e5770d5f46f735adbdf9de1931522ce3118e9a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USLD91773852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2193788a419382a27b6a38d5c10f826e419bfb57ab868922be6ac72cb2f66cd8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:12Z), 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/USLD91773853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236fdb4f7ad9e4ef56a486cf4a95801b257b53b6f6bead7a7411d8af6b227239. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:42:49Z), 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/USLD91773854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a990f8a74ee5c163ceefe387c7decaef4dc9a7147b09efdcc685facd1fcbf6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USLD91773856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d225898dfe8e937655859f3fd172afc012297931276cb5fc0d40775c5cf9eb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USLD91773857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf563813845c079696231d49ee32af711fff97fb76ad57a009c6f46b4a8928528. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USLD91773858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3790b913f3ae1bd42ac634a7318209206f2859f650d2ae0f85f93afd362fe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:52:26Z), 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/USLD91773859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d54521b7f0cc9942255c28d0788d6fe81b679b94d228dfaaf9342067a1dbae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLD91773860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf804027e99a9d1c367733a086ae177edca7f346b18da7b250b952eb644ae5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91773861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdf00b6d3f970c7110ae4cfc5193119fb180a5b7d5009d692dca11548b6ce36. 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/USLD91773862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a36951840523f7c5322b1f9ca63c4dc4cfad08342a849f0f51575a3eb73af. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USLD91773863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c96e9faba9409c83a5c898fa4f51f3d0c31cb73f6ac8c969575edb640333c6d. 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/USLD91773864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd816a574a6dcefb75187f091eb8a84975ebb0edef76dca2ffdc628840faf414. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLD91779330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecfe06cd2cbecdd6dbcf38d0562edbb21e7737f5b655a0856fe24330c380541. 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/USLD91779331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786145d770efdea7f6108f24a726d9a73a06de19d3ec7fac3dbbd0a87216b301. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USLD91780681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bdf29bdabe1188161b86c728afae243ed3a02ba24bccebf30c4eb35cc6331c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNMX2571020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa352ad957b6da84d8596d5dfb46e0cd3673ce6c49ad31a245e273700f5f9ef30. 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/QZHN62558024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee7fd27c8e3a6d2f96739760aa481695649efc59f3352408f7deec8577465fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAS2298971.