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 0x4f490cd89166c56b0a844321e351ed592494eddb1310c250c15d356b0de1eb65. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad7512b5-7a66-438c-a4ae-68d661a25f53.json and https://artists.proofprofile.net/proofs/artist/ad7512b5-7a66-438c-a4ae-68d661a25f53.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 0x6970b168285c4f3f4a232060c38b2aefae4ce7fc67a6fbf5fdcba9b651709074. 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/SE6N62205551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3921b136e7934f45d0965a481fc610e96f2cc29bfbe0cf5a1b8e8dc2a9586a3b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:28:31Z), 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/SE6N62211167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11612b906962b9efd6eed5a67f5c3724c9f5d572774a6b4fb342812f8e767b40. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:37Z), 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/SE6N62213955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52e6484abaa846fb5b233d56917a66e86585342e6d8a1238603da46cf6ae26d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6N62213708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4612d8eb4d8f657514b6e749636c8916984f430ecf607978ebd5ebd1b12b3593. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:51Z), 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/SE6N62214452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882bfb7bdd904af89ab138aa87045db6e5066c1fbf3c0017dfb171dfb58860fb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE6N62215545.