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 0x107a815d7687f6372edc029d13738b0fa2703bcec3aa653a047ebfff1813009c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/786891be-6f60-423c-89f3-9d1bd284e5fe.json and https://artists.proofprofile.net/proofs/artist/786891be-6f60-423c-89f3-9d1bd284e5fe.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 0xca8e57ecf559a916452c0a617280bf664899a37be6b7ad0ea0043c13fbdb1823. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR0280602013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5546019ea835a7e9e290fa08ae9ac0d82f9c29789c658945b503fad6b5a6de42. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TR0280602019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666c1401fd5d0e1033f25e196b3ddbf058bb5a8aa612e2d0fb9f708d9e7520f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TR0280602022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b340f52d0defa23c665f840564bb9a126c2891be596e8f0d5062df7b1817a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TR0280602018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0ab2985e9fd52c522a0d3d6da1e41c55ff3cf49e7bf710e75ac3c13fcf424. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:49Z), 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/TR0280602023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220893a6e0d39c442a07d804c876989a6f0c23043f275f15e04cdac837a45c49. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TR1592003898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8889e593eadc22d2e54fc9523cd51c1c51fc1d5a2dd66285ebd51c8f5dca3d6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:31Z), 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/TR1592003899.