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 0xb84eaf063288233f32f8d663bb2bbc00c9961ce326fb53a4ebbf3cb9a7f387ce. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4909347e-ce66-449b-8f54-1eb3f5ed16e4.json and https://artists.proofprofile.net/proofs/artist/4909347e-ce66-449b-8f54-1eb3f5ed16e4.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 0xb4e830fde8fab5b249040a978d36df20735bb48fd63e591a25ecaf9192723562. 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/TCAGO2299731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed4055d8ddf2463485112b929df5f7f361c888b38e6fe0bed6462b2ad0d0e0e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAHF2300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0bdbdb75e6ab700d832700a558fa77410b9552999ab6df6a8c93bb403c53a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAHQ2325731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e97c5fe05a9d4537a199aca5dafa6676e77bd6ab99903541a8415c1d4605b5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:19Z), 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/TCAIC2447664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf2143d2e5916eaa4f1f7f2cbf55ed3fe1dde77eac7b2881130c4501193a4ff. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:44:48Z), 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/TCAIC2462377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb799502ed8373281e6203b66f4f9f9c2348d9ee987286f16e4307d550f42eddf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH6542424208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb91ac3bc365a3f938a66285c5f14b61c695e6ba220340bece557f5b5983f057. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIU2459926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54bfa9f35e74a472c5f2f85aee63c378747709c7a40a86bce1b267e1716b639. 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/TCAJD2487579.