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 0xc4b937ff40c847ac1cc2ea9925714ee9f1316ae987231c86556fc617ba84cde3. 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/3741f3d3-3698-4f53-879b-1ce9f2a4135f.json and https://artists.proofprofile.net/proofs/artist/3741f3d3-3698-4f53-879b-1ce9f2a4135f.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 0x9c22de1d6b1cc45b78b7853b9d852ab8970ae36269096ef876d04ef9b787c72a. 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/BCSOR2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299e51c8b0ed7fdaee6dc84b183f86df1722e58265b1959e52c4bf4a5b3b5c6. 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/BCSOR2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693ba7b58d81513bec0235cca2013e3cca654015e3751ce11abc6c9c6db61ca1. 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/BCSOR2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138f2e9c326da5c1fea928668336af673ed14bd975ac1852c52018f5618031a. 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/BCSOR2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062aff852ea8766f92b0a3b59101dabfde4f5e95a32498e10854d45ba0e31aff. 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/BCSOR2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e4552994930a7b43adde6d43bb5a871c2949a78e45f5b059298c78b6821a4c. 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/BCSOR2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15710f4db54b9ec0d99f454e3d9a397083fadcec7b532f4ebdca365e0cc5e2e4. 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/BCSOR2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc34d84f0067742cf80ca91109145e93f4a31cb6ed2c6d3eb5d81f73a76b47. 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/BCSOR2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9d38f3ce28450e38ca080588df10c81900c762be48322010ecbc2e69d9e9f9. 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/BCSOR2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80e5d894797be88941dcde3f09b0ea9147ce2c6639af3473368806cc73c576. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCSOR2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6562a79355aa60b370f2125ecaa0377f438741dcafd41ea5b459c20b2f465af3. 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/BCSOR2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dcf78f90500d2f92d08ec13d6db9f387342cbdb9dd070945226c504f289873. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:40Z), 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/BCSOR2500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b145841c19b60490885c2caa8fb8a813c847d05c239dfbf390d2ebe084e47c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:31Z), 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/BCSOR2500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d8aa15f16d2d2efa489142314272fab317fe93c88876819492ccda4f238dac. 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/BCSOR2500145.