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 0x1bc477edec98624a9fdd92fc42a7ed7d624577c08b7c88f04dfd5d76d4c23e82. 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/f4c4d99f-8c04-49f3-bc94-9588cc63bc41.json and https://artists.proofprofile.net/proofs/artist/f4c4d99f-8c04-49f3-bc94-9588cc63bc41.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 0xcf6e6d62a6f54f7de91ea488b342dc24ecb9215f74e94e21a58f853233aab622. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:06Z), 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/ESAAI0174938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0d258bbe449e876d3bc2370d3a4ec75b20d54c47217750f74624eb01e4859. 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/ARPEJ1750550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d07b25ce4e12dc0002d31d22dbc8d7cbedcb17ee924737b3ac88e6ab89cb8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ARPEJ1550212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e72e2db56a09265facc3ba362c0021c5e57c073aaf8ac88c35ac78d4a0ba6a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ARPEJ1550214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68962a6b967ac14faec26018a2d46f8337baa6a05e08cd93e57355f17df7bd70. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ARPEJ1550215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b3f12a0098e905ab36e6651e28ecb3d64b02c1bb413fd1326bda709b1d81d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARPEJ1750681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa933aa3e5a2d4eca93230421ba1217cfb993274a465a7c15732e1581ea7a8c6d. 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/AR7VX1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc455c76d8c3d65688a3badda8748e5a4ce2304bd2635bd484d67b0c9e72c7983. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AR7VX1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7ad850bcffbbbdba5d173645b7cf00f7e465ee4d034b8b59df7159a4fc7ac9. 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/AR7VX1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ebd339ac0263447725f0cb77b7a4a750f00e459d9288e016b79ed933552f04. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:00Z), 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/AR7VX1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62389c3f138585e5b127880c2b198634f53d57aa97bd99446bf09cc11375585. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:47Z), 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/AR7VX1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb052eab4f986b8213d05aa445f86fa79b292732324d26731424b6ae0f940f44. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USMH92322467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd2d08d1fefdd88f5221309b3ff3db3fb2b0eee1aea29dd4c52d049043aa224. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USMH92322468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12548841c4ce47b939fc87e0653f7e083a91e6d53f38806a6e169afcad2a2b. 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/USMH92322469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a9bfa0df4d891fdaaa3cea8da84fc4a55fe000897e9708f31bae0afda4353f. 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/USMH92322471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6467c15e9cd8c738751d70694f980fb68906137c89b82d9aa9dd567de2032b25. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARH932500001.