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 0xb414caaae27599d35f2527a17f83e0bd823bc5a678fe3e2db4f5ce28c10ca89d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/169e1cf1-b8a0-4334-9737-d738abfe36a8.json and https://artists.proofprofile.net/proofs/artist/169e1cf1-b8a0-4334-9737-d738abfe36a8.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 0x90c8ee7530a6693993cf713e255089abf600d96314437f2feb105eb0919776a9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:43:05Z), 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/CA5KR1965202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f4fad2ac4caff6b88d4068c8e9285e52b13a5ff4bf72832af819d32c2e18c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CA5KR1965207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b6af1200803e665b3a00ae4d6131d11d59b20634ae87960c48eb8c89caf039. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR1965209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc52a9aad719489aba007be5ceff34e0376db0d45ba84260e8d3a0e6784ea4. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/CA5KR1965211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469025bf8b4965b939713c17814785322a7fdd3652b006aac5221316d21e793. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:17:28Z), 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/CA5KR2314896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb50497b4efd0239822bc7c81c76345c7327b6de49f3d8b7f77eaf1d762cfa. 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/CA5KR2327549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37702993f565b1c983632f91903b9c3cf44469dff231084904ba07e7a84c4d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2348619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858272d506715f7ac3d81a4f43d26fcc5a92241cede3ba93ffd3d467810b4d8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1965203.