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 0x9e1d375d9f4bf07c39e9eb604da3d167add2d4838bb82fe197345f0f345656fc. 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/21072dfd-61ec-464a-9cad-b9d9938162f7.json and https://artists.proofprofile.net/proofs/artist/21072dfd-61ec-464a-9cad-b9d9938162f7.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 0xc6d1c0d4d84460f11d0df4c10aa54c099356cd2fa07a9813d515049200788d21. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/JPV751800845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ef3996a6b8d4e34d7147a4efac18f5040a00cd28cf86d291f12fe77369a09. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPV751800846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ccea7530fe92ec0425abce9cfe2b27f00ccf15042a7affa6aa39c83a5fa76f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPV752001779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7745ac10ff8bda3a8bffd057c74c1bdbb041a712591a5eed0277846b3d2ded. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPV752001782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe735e231bcd9b47afc597ae98ce3e3e01126af172fb4f3306bf560773989d. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/JPV752001783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa53faaab9f895985a17a48f8b8a0e4cd645fcdb45578b8e95255774f7ddd85. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPV752001784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe452ec08ac1fb878b1d6dad0553ed298342be221bc93e41fdbdb914b27bbd25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV752003451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70621a868ef43c131591c0d61fabdda27b228d6627b4c714571ed6d49060f4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPV752206663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e43bbb8211c44ef2b474832bf1548753b95e147d79954b7b43a4b0f26dbca88. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPV752307867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc597e7b62aeafde799490547f49d0b156b0bbaa09bfaa2227541b0cb25de5761. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:08:07Z), 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/JPV752409549.