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 0x567d38866f506d641fe45f3bbc42f0c85cce018225b1fe24c33a319b8c174052. 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/e08d5cb7-2660-4bba-94b6-9b689d2a6ee6.json and https://artists.proofprofile.net/proofs/artist/e08d5cb7-2660-4bba-94b6-9b689d2a6ee6.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 0x41d91bac8cfa5d4ef030c577880737252f9b18accc44aeb3153325b5df7afc85. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRFYJ1400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed2d4d05ad77ba8eddc7dcd9fccb161d825e7edc60bc3d5597bcd34c68b3613. 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/BRL4N0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9362c9cbb1731139af626bb7e220f90f90527d09c418a5108815d03f1769d065. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BRL4N0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a95464032876e2ba5d85b49a717b689a09b8e7a9445b773b011a129a12fb47. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/BRL4N0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a4d29f1198cdb7ef38d0f703c0347c8e3db5b640fd8b6522c5ac4b881daf68. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRL4N0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b16db1dc768039b1f099be1a54650dd1b0b6b57ec73caea5be95fe37df1e2a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/BRL4N0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd91a92f0c8f8a6639d4de31633c0f2eef0552d96d5a135130b24d9ac2f253d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/BRL4N0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b657eff4dbb76e8299ad029353590bdf8b631bf7d8b34c93b45807a6c27c5d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:42Z), 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/BRFYJ1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7371e5c5b5886bd2c5c42dad99a42016b03a409ca637b76aeeeeecdda8f8c39. 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/BRFYJ1400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e75211a9f86f12dff15ea0b6331e4eb47922a9247b85dd2316c3b63b367fb09. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BRFYJ1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbda8550f6a6329c210fa360ad042fcdb02b8e5189680072df7bcae54af7900. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:09:00Z), 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/BRFYJ1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf45ada62eec7261732eb5c76b071288ed80348b2581f415f09f83dc17d25f9. 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/BRHUK0500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa42b6467665e8b0f1963a3bf04772bbad49e81da8ca86c47a8c8ff36ffda602. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/BRHUK0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7219859d7d396e7ec446ea64ebdeedf1bd036b0c766b0e575ad79e2a5759232. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BRHUK0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d212b86737b438776f39bdf52da8e3671b6204b30b00d1bcd4a13d556da8ec2. 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/BRX6F1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61bca65dd88d5e282993162d911ea8eeaf050b6dcc8173524cacdc951ef0363. 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/BRX6F1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dc4ff6997c97bbb3e5948dc828734b524532eb70c79e16d401c93de5c39770. 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/BRX6F1800119.