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 0x77f4d37817eef61df36d75860756255150ed53c93674ef4a24599c60613de6e0. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/500d58c6-7e88-4938-8e0c-9116cdfd5a16.json and https://artists.proofprofile.net/proofs/artist/500d58c6-7e88-4938-8e0c-9116cdfd5a16.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 0x0c35877b7dd1aa3b94936c8d298340d25b827694f781dc428abc1eb492e135d7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ROHPA2101846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015d4db82ed07a31a33272f40730bd4793564f5637752bb3476cd67cbc68eb47. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ROHPA2101847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6c03c576e20306759885a8713d92406bef3f5658f23d8eaa35b8856e5f48f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ROHPA2101848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327a12394832997e37ebe01eaaa910f8e4064587176c224aa2b3d1720802caa3. 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/ROHPA2101849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136c5bd6b6a0d594f1ccd261161c2751d3308cc8402d15266d1f7536f6ea4a6. 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/ROHPA2101850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed6eac73d27a65dfab91498ea12e06ac3d8668efc72b3d0357bc87246537dcb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ROHPA2101851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aee5ea6c6cd4cf8b3b7164d0459de89443a7de9919ff3902f064cdb26d9cbb. 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/ROHPA2101853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddc440278566b456b4abba460bb16c824c487dca02950525f31815f9ff9e650. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:33Z), 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/ROHPA2101854.