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 0x01bf97cf89f34173ac1c35f1a9e04dfde584c4bcadd32f19245d521c959e4071. 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/32bffb9b-a8ec-4c2b-bc2e-0e2c3d454032.json and https://artists.proofprofile.net/proofs/artist/32bffb9b-a8ec-4c2b-bc2e-0e2c3d454032.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 0x9297abf5c071f117433af7f69ad6964f0096ae31979c2c846b6721fa99a9ec70. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:24Z), 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/QZES72538658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4bd2d6dbb82036f412aa9eef7f5ca3cfe25490f154d4325cfc997f1f5d90fa. 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/QZGLM2492590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2fc2fc5ed7231e0c4e7f94fa5fdba13c791c0a436b9e2af5a537a39c090e2c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTVM2441114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dfb8a2d64395926c45e38684f2c7087713ff12059eaec7621e33796cd24730. 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/QZNJZ2422680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c84c38fdba9ed625742561a66b42322a6d74f60e188dfb396370ae6d348239e. 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/QZW9L2419420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993413235dd47ed80d30cd0175863fcb47b6ef27f5a3ae081b6d342ef750f9a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN62563231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cd6bec7532d8445724877dc3a26d927449dbf8bebb569cac48adeef282cffa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWX2509559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba18727fa3328acd4045dbe57f6ea7ff8f53ec878289fe380e5dd1dc76e1b26. 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/QT6EE2519517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f6719dc2bf7a80a42d7249a7cad4c1207b733c46a0ec3e9bcdd3dada1169e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2468702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21c676a8e9a3262abffc85c6df89dd7c93639900c349795f5a1007ae153cf4f. 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/QZK6H2468704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92890edcaa4bcfe87b5ee666f5c5f1056a0175f95a5a79044244154e39f5745. 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/QZK6H2468705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be0a0f787f0f272ae470b688b37f04418722fc06924561ef4d5fb1cb655763f. 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/QZK6H2468708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca7048ae6d9b76177ba8b619a4e14b4ee83202c5e55e45cd19df7219e46c668. 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/QZTBC2498520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf40414e2a3a597c1acd77205eb1bb0ffb318403c5df111cdaa722f1f1f0611. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAT2411651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e93c178cc0001a1d410431de48d391f073a68202b9ab8e7618632b1eafd592b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB62487065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665d01673e4546d50b31cd9aff4ab57c8ad73f08c15864003a86fcfce80060db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ772409067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52527880cb1ec64f2e8b35cffc8277570d6ac45cd751be79587236a6557368b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5BU2514557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5421a48a855eca646c973ee88a47094c6d4671892844415ed2e7780299f8e7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZZ792470379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf40414e2a3a597c1acd77205eb1bb0ffb318403c5df111cdaa722f1f1f0611. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAT2411651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afa52e6544788a16682483c9a16e0e3957bc43e04f8477ca42f128434a1840. 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/QZZ792470380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496952d4a16d7ab5e8aba58a039bcf12ca975e3c1e2e372897d9412a9ba03650. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ792470383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5affdd5271bb583dc78b911b97aac47a1e305aad6f7f47d18b71178d776e41fb. 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/QZZ792470384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1c399e9fb344bdbb8d2106883e3a6f9d748c6b81e9c113c9ef9e0a0213ad2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFP2472740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca7048ae6d9b76177ba8b619a4e14b4ee83202c5e55e45cd19df7219e46c668. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBC2498520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbdffe1ea486f537078076e02b3deeeb797e6807694732938463abbf22068af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ792470385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773ba5f8648303802d8d1aefb62a53eb2a747e3e766b27a5f32cf98e8561708. 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/QZZ792470387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d97c3109000d586cb42ff0b4d7816af8c775e3572c30340028ce135b7792f. 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/QZFYZ2599393.