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 0xe5975c814da2204a8d820fe6045ed55f9acc0adb362859f73e32f39bf7f12554. 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/f791503d-7a8f-47c2-95ce-4ac44274862e.json and https://artists.proofprofile.net/proofs/artist/f791503d-7a8f-47c2-95ce-4ac44274862e.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 0x192f3e40a058fb9d975e04c67e41c276f07b14a3e880eedb1de1408883c3198e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES5591101295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dda3d152fcf96b6efcf46c89cc3cd7de4a9f56b2fddde6aa8ad2c52df191a22. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ES5591101299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77510115fe8d63253571b359c18e28a9ecab9ef64826c0e7791af611ff538875. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES5591101300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b16fc8e568bd0d32c44c6645afa616bb413756014f4564187fc8eb2a62887bf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES5591101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41de2a7af330c39f377d52290d52fa49cc85263fbb229523759edc3f9cd35b2a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5591101302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71b155bcbb983208eb8578e34a74b25287216fa38042c50fc34176a67cded79. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:56Z), 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/ES5591101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152971ac22e7debe6e6794b321b54ee62963421a0b9e01ad6b45cbd3dac6b554. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ES5591101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b931c6171f2528fe4a393bb7f8df82548da78ca2365f235e74e90540d8f471. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:27Z), 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/ES5591101315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b4ba7611f4c3bb4aad20facf2707149b33a49d014de89dca05df6c5a88b7d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES5591101316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566b28187421f97b166bb7c417c10f02c4e2ccdbdeb4968e24ae2f84e1a2ed53. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ES5591101318.