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 0x1fe49d43a650ca6bfe1a0ebe79834a01c807a3781cdaae93b22c7e35debbbc6c. 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/6cb87a63-f184-471e-994f-f76beef57110.json and https://artists.proofprofile.net/proofs/artist/6cb87a63-f184-471e-994f-f76beef57110.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 0xdeb0c80ab8ead5a298eed0cf9dbed4a7e6fa0ba821222b2a05af757e53dc81f6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FRX762008176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ab4f0eb9d779f0f8974f17fd8741639cc86c7b7beae42de8d815e12a48f6ac. 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/FRX762132047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d06655ba3cca2f05a8f3bd28f1d4003bef3cc6a3cda319293cf61dc8530563. 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/DGA082234073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee86abed078fbadcb49cb8c3a47e2f3e29ae63a6b02a31bff8a9ecd9b394bd6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR10S2381571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99140482f5b9d82db8169caddf8b846cbb13875aacd997b4dfa351763ef537e8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX452397767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f41f0c24352bc0f8770edbf4777a24345447323ddcfb9ac2d52e1482686015. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:06Z), 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/DGA062301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2961ff4356c0a1f178f184b4e213cf45d67bbcbbe97563f5f2e8db4290be37b9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:11:06Z), 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/DGA062301921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910a2f9b39159143d794bf0dbd7e9bc24c3cb1fabf81b4f24e1b47639cab63f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DGA062301922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd7c84386578bb4c306dad60ecf46264925a59680a26a80ba4e6ee4df99c20. 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/DGA062301925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3dce5050e5a7c53419ec503b28d216aa36d480f7017932477336c5938a435. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DGA062301929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abf6d68f3fd0a84f52d7b4f007026c6603ebb667f28d9a6aa1f4eac8193848c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DGA062301931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed8eb217ad4bfd57affebd3a55bc84f605c547940adf3641cd5391e1658858. 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/DGA0T2439301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07425a478a0f551c5f8e4590876af5c9963b23b2434ad222759235e4565c4f8f. 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/DGA0T2439305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2fa9bf0361eba620194584eb135912317c0de9fdaad38c0e4a7f355562259f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUAGV2500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a905ad8a3741f2a16256f560da3870020f87ee3c6fd8819761aba6ebc2f0d2. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DGA062550662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff827e77a1b3c7be1378d3dff148cf0427405ce968091a55676cbd63359666de. 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/FR2X41970143.