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 0x6e61c45c718646897b97e89ce7f0e68353afd0fd359bb1b0de8d4d30e30e06e6. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ad959cc-4cf2-481c-8be0-2e4d6c2aee87.json and https://artists.proofprofile.net/proofs/artist/0ad959cc-4cf2-481c-8be0-2e4d6c2aee87.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 0xf774313f802bcdf2ac7cffa58cb6950c71402e6923187d4fe78caac709106fb2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAWHO2128093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bda8a9272dd2d114793b4399bad3bb0b6b336282b335d70745fefb87e21ca4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:31Z), 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/CAWHO2128094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78666585ccfb46b8a2ae85d88c81e1ca57fe959fdd2521996e9c6f08e2326b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:19Z), 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/CAWHO2128095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814604a8c648c649ab54770f97628f39d0c78c77e3b4db04f78c7b9dacaa37a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:12Z), 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/CAWHO2128096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d833b3553cfc5fcd05646a70d6de958340a6e656d4bca141a9e86d6d19e96. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAWHO2128097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3111a1b73563d9ba1efa1fb48c381d785e80a2741cf96322663408489f785fec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAWHO2128098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06162fe3b143d64d319ce88fbc76cb7f224970bb400f41e2c167177535f5d631. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAWHO2128099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e3f9d426983da0e601ace89d721223656ec6cfcce082f1da31ce78d89e9f1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CAWHO2128100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dbbbb8d7286d7919b753fdc7d645ba5b2061e6c3d16e6d36a451a012f75e7b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAWHO2128101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3198b6d378ef5124bd771d0e4d89e282c377898eae4cc5406c3eab01add4549. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAWHO2128102.