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 0xcfe76058cd710ee07bb5959f48b0ff0bcbad407df4b5ef41245efbde3e89a1e2. 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/3b13ad7f-69a3-4cfb-8d8c-bcb758aac371.json and https://artists.proofprofile.net/proofs/artist/3b13ad7f-69a3-4cfb-8d8c-bcb758aac371.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 0x639e5a76f825f2951c12d751c545f14276e2f889f6f6ff25d143c62ee53a8fa1. 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/BCGE12200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e56a300f9c5ca46fafa3a6043435680d738658c75b4dbb2c3bdde7350497cb8. 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/BCGE12200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe22e99daa26fa03130391c0f955d1a796d571a2e5170c904b3ab30d208f418. 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/BCGE12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6ba7cdfeb99ba0bfb001bb693dcff9b2aaaee2134f02a2fb3205d2edfdf0e6. 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/BCGE12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcbfb1649dccd51f355c90a14d54cc4b6b370e8577f4840ad1c499fff3e872f. 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/QZZ8A2496677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb829f71b27155525d4ac5aa9fea0c4bcfc8b36f7c86c53c1f155e8f90cc20. 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/BCGE12400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a537a3398cc38c6abb67128f0893fe289764a8faf630c9e7672c4eb4ce2c289. 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/BCGE12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaea16d42ae4c6e9580e9d4dd2adc995426632a54584d5bf6bf010515a66e73. 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/BCGE12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059af43742424e81c7c6cc3805a270bf7c86357f725e44efecfd65e3702b0c4. 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/BCGE12400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a537a3398cc38c6abb67128f0893fe289764a8faf630c9e7672c4eb4ce2c289. 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/BCGE12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaea16d42ae4c6e9580e9d4dd2adc995426632a54584d5bf6bf010515a66e73. 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/BCGE12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a0ee7d4e6cc4595e3e11457a886531f5f8671e47a8f8da617483ff2c7953e9. 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/BCGE12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcbfb1649dccd51f355c90a14d54cc4b6b370e8577f4840ad1c499fff3e872f. 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/QZZ8A2496677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69da20d4b1689cf190eb62badd32a4ed32ca9e7765520090a756ccff70ac5cd. 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/BCGE12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cfce5dfd6c0bea861d03b5a27a8e2b0ad79cc375bfcd5461cecf1cf45d84fc. 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/BCGE12400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb829f71b27155525d4ac5aa9fea0c4bcfc8b36f7c86c53c1f155e8f90cc20. 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/BCGE12400011.