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 0xd81121993e2efc4a3a013590681b76d72272d504a0160b4983899640bcca4c6d. 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/2fd2a5bc-7d1f-41a8-818d-81ebf395e645.json and https://artists.proofprofile.net/proofs/artist/2fd2a5bc-7d1f-41a8-818d-81ebf395e645.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 0x04f09ae2e268b7fffcafbb5e4c895343a9416e8af38122cc1f0532627e487229. 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/BCGNJ2400008.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a68fd7d531e9af067a41a3e37d5c22cc9a97f9a8488ad8b67d77b4010bcbb3d. 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/BCGNJ2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653da530839d636ba52f9145218b82ab830a63b50ebe2e5316048cf609ad96a4. 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/BCGNJ2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a01fdaab8f38ba86ed25ef1396d241952cc595450a5d8b7697c4ac40855a861. 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/QZ5AB2484249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d31d4d4f886540e454070de4ec98644f270d802e9fcab1339e59097446e5c52. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BCGNJ2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1d2334d43086f2af2efe13b9ac677c8e28fc34b5b53604c873a11c0a2d7d1. 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/BCGNJ2300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3150008d3b4d161ed77776bcf37ceeb64034adf181cc3834f45aa4c06517a3c1. 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/BCGNJ2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50543e7f185d144f42cc183160de2d5eba97ff0ab027d737ddbdf7a611a107e. 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/BCGNJ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926f7b8aa41d563dc455359bb68d879c48aef462a44b1128625888da690d812b. 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/BCGNJ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d07dd5f2b363460a711fe85072294e13419c238e78a611a8935b61a40d7b32. 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/BCGNJ2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7762f414e37ef8f9291a4f119d41db9bf5d1ac340dc17037884ac523adecb. 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/BCGNJ2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a0ae92865cefa8e82ff188801c853fd63db856c3f496495a00a25d293e1ede. 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/BCGNJ2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf02cc7e30588a7b79299dae77dc07da2d282d8e4b46f7c728ec8ec76e874d5c. 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/QZTPX2403632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb6c9be2a6ba05a4adba82b1deaf1d17e81d34410301edee30a4a9a5005ece. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCGNJ2400042.