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 0x5fa3367ab2b48bcb3b0e474f30cc6fbec0fa70d9eec9a7a0073addbdc1885efa. 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/36f78fb5-5871-48a5-9529-708ba7b7b689.json and https://artists.proofprofile.net/proofs/artist/36f78fb5-5871-48a5-9529-708ba7b7b689.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 0xb30429da01488916858e186b5f4e0579b528244b88529ee3fd244642efbc3b5d. 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/TWCC32412677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cfa1823e08b4e61e7e9f078eb072d4fc621ddc1ac676c3b5d5a915e8c9afab. 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/TWCC32400494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459cdf0d7d75defcf9991f521bc82777b09ab828ab5bb052cb385e72969d4c4. 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/TWCC32307687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef68b8d14b1059eb6f937d29a4bb3892a6d9460b9650ee0f6c60f60f0a7f156e. 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/TWCC32300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9d2e4349e0315c2d644d83b4d4bf342c0b7f1b838bcbf29b8fa6ecaf661d96. 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/TWCC32206804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e429ae7d63fa45465979fb885912c577a6829f73bc6cafe311f996562d5719. 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/TWCC32203057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a5e1b390ecfbb15e5cba42290979682dc156904017886072e207d2573d299. 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/TWCC32202110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c74e5e6d267c2981069c7474e7f9bd7226a697641b364b277b135087e14a441. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX872180150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb53dfd1b4090f805cb3eef1e39b610ee1219ed3ae15c6b0898b2f2a567758. 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/TWCC32109443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff235c4d79ac8836373b4899b082c5d11303626756b2d1cff91e5fad27a613a. 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/TWCC32108267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd335873f9ecbdb848ec0d18e1570326b1e469b70a8e1e1ffec6592d9b36bc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWCC32107709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8284ff592deee4d1bbafbf08778d900f8d4c334e3af519236d122a4c43192. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWCC32107192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dc3f670877a3d277dcfc6ef3e577352ddffb7f907bddc55b56af882d35c077. 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/TWCC31900871.