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 0xa2e65304a290c1a9c16690bdad72534c84676e5e40ce0af20305a56165827df3. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45abd610-dcf9-49bb-9efd-3a864037f000.json and https://artists.proofprofile.net/proofs/artist/45abd610-dcf9-49bb-9efd-3a864037f000.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 0x16dc89de5abd2ae8feca27a1d4f4e97c1e08ef67fd4a55b77a33d3b2cd4f4261. 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/ES5591100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51297f4839ecefa545cda5c0415fcf526bad23a4f81b5d506a862a61b19d6608. 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/ES5591100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb456c81d70a04248db551bb6a8806ae1f7f78df8d3eab396a58648bae1d7a23. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES5591100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab8c42b9969331108305b62d4e18986010bf58dd3cee893aec166440042b00. 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/ES5591100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5550a4b778fa48b2146f3f39568bab41788a21a15098dec2d6df0a4d6e62919. 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/ES5591100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b6eb21b75b0b6e014515a2be8d75cac2bea0832ca4bcbe520ff37a3d98ecce. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:52Z), 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/ES5591100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc1d3ba757429ebb1bcf2f3dd6d1a7dd669da2c8a62c96d0984d01f8f6cc2a. 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/ES5591101549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8134abe724365c68d7eb8f2d219f4f6313e24adc5a22ecc5e0f6ae8c9b10089b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5591101550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2547bddb789279a4d41912a86383ef6d3d5da5d6649e864234463027b6ffe34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5591101553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aa6a53e20436d12f079b06c656044d2d2df0f8bf80e6fad4606d74cc6a5cae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5591101556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a22ace67c2036b46640b1615a1c92ed11a68497ce363e0030ad8ea27913c4. 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/ES5591100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5569dbcab4e2ff737e8b419ec5a1d3b737d3bf692e6317e453be135d51b0a32a. 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/ES5591100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6137e6f691fc47fdf660d773537a6aa5625153cb1a197d9ab45f8d18a183c9. 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/ES5591100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884641bdceb8b709599f18e0a679aee5689fa2ccc90e538bd03a6368354f92e9. 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/ES5591100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eceb44951cfb71cb2d3a345a68621831e4147821f9bbf037d9ab2dbd85fa67e. 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/ES5591100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a074e712e73c49543b2ffb39c013d137f5920d764f7cfaa309adb4f4445d293. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5591100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baf8fc3b91884390e2b629fbd4399f82f9ee5eb644adc823309289ae4de2408. 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/ES5591100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6dddae831a04006118dfbfe2e22e08afc7da39a767c57162c5543a486d266f. 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/ES5591100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83866b081fe9cbbd40aa033baad0bd7b3792b45e5442264d5c7469cb56f28bf2. 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/ES5591100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a22ace67c2036b46640b1615a1c92ed11a68497ce363e0030ad8ea27913c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES5591100361.