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 0xbb3d322451a73a3480a0e9119d48665177d9af1f0191bcc2a68448f58ac9465e. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e5d2806-9474-47c7-a91a-ecbf2f9976c7.json and https://artists.proofprofile.net/proofs/artist/9e5d2806-9474-47c7-a91a-ecbf2f9976c7.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 0xb0268be41a0ebcf510c660d02b4e1fe1ce75533dd662d04c90cd61f62cc26bcc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82183051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e97dd23de74b1f101996ec02734821d3134e01501bc824cfd8a60a70deea6d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN82183053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc62a03d2843ae249db90a4cc9545adc31254aec0e3637102703baedfbd3e204. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN82183058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff692e5907800827ae2fe122b1418367805cb705688b8fce4eac60992b905eff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN82183060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d26fc2a87c7bd8a600b4655de6e23264ccd2c0469bac063721192c3449200f7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN82183047.
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 0x413c7623face7b6981393e558df73a4d1e39f27db4dd13a6821c1f444f66a613. 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/QZHN82183048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b488ff75b58c972e97c6aec162eeff797438ea62931811f29f67d74ba6bbd99. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN82183057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386c8dd0fabc575c9ae7ad187ff5a34cac82574c634eb37de3f0509fda35e6d. 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/QZNWR2252780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc972557361a32a2126d3d89fbc5918b8e50a7aef439ccdf01a8ebf5c0310fce9. 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/QZNWR2252791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf14e00c19385cd53dbbd249abb121375537776bbc43236a28e4dca50308ce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2252792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc43c0c79b19e1cf901b1a16794b88b30be9e279d643c8e7f20a4e7bd0f6d8. 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/QZWFP2426521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3664836a91cc49bf0d69bbb0efed1573bcb318d7a465a2a681aa3423f69a74b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:54Z), 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/QZWFW2434012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae9b9a56648a8e63a2e23a77496a82a8cbaa5b2384117ae563c091158494988. 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/QZES62515410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7bf87b05cd89bb6cff4a392b0e01a69e302377866e4842dd0af27fbbdd3361. 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/QZHN82535425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff4a2b828ae21e7c6eaac5d98420efe0fad0704db9290f885681a15073da13b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZNWQ2515937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd848ad3e1e27f17bd5e84dc881473246f45bd7e0124bc1255134e816824ec5c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2562679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91fd04088ac0d96b3157895a5a0b00cd5e51d81961ffa545260de33d8eda40e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFF2522708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145af460d50f981c88d59a732fbc59cd9b498ec9b52e6e678174a521792be8b3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:08Z), 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/QZWFL2533599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc5f79c1be0121d399968d54fc4c2df345d960f87cfc0dedc3d30d38435731. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFR2526553.