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 0x834ed86fcf4dd12b74fc28569814315db79d624d269c3703c7b541d86ab1a72e. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3248c0f-e714-424d-83c7-ef3c1400ea25.json and https://artists.proofprofile.net/proofs/artist/e3248c0f-e714-424d-83c7-ef3c1400ea25.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 0x8fb42004244ef5ee9aaba8515f6be641618cf8ea583eed7cce9292cd879b3c7a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:22Z), 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/FR9W12503912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb42004244ef5ee9aaba8515f6be641618cf8ea583eed7cce9292cd879b3c7a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:17Z), 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/FR9W12503912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314565988e44bdd756090c880393cf73fe07df20a131fa452c13d5808fa5f1e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:03:52Z), 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/FR9W12503908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5268d4b90c864e943ca8f1d2dc13f18ff1ff791e161d2b0fd4e620597b0f39. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR9W12503909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc132df75a874405bf069ec06e79da3a8e01cb169e8aba66f7f7a8c8a04b439. 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/FR9W12503910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359b48f8ebbbfa30d11deba75b02a6646c6540b3d878f51d8d78e43d7b64bfce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR9W12503911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb42004244ef5ee9aaba8515f6be641618cf8ea583eed7cce9292cd879b3c7a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:51:55Z), 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/FR9W12503912.