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 0xa7e26aa1449558189f8193b703d648b5128c0f645e1363e41ec76a3deb532982. 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/48baafd1-c2f9-4f67-9a75-5fbc27e693f6.json and https://artists.proofprofile.net/proofs/artist/48baafd1-c2f9-4f67-9a75-5fbc27e693f6.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 0x65ec6c1f56ee521dfbfacaa5aee269eb5d072ea1e3cd257344c40b39e70f2465. 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/QZES52335931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec4bd441572bee1696119a4bddc07a624aa05caf2a073fb8122f69078d22ef4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWW2474807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cbc07f8e7dcbfd9f194d0d757ba8d29297beb931d46e8b989a88322178779c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZTAW2498151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93649798ef95350a17ab13a83907a69b5bd138317165de05c0a47796c33de7b4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:17Z), 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/QZTAX2400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5780ccf926a79aaa5bed862bbb0b859e11c918f72c0b50dde1fc57eb985a4cc. 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/QZTAW2498073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95e951b66cdd5f9fa41a78fe09857105a68c36dece649f97e5a6f1f5b68f201. 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/QZTB82403941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b96b5b465642d1c16f0b1d7adbaad9ec0a53fce210e887865354af559b71485. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:41:28Z), 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/QZTB82403942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d62e6d66994b31eb3ad05a3de5518392805ad42d6e9ecb72b38c620c73d96. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB82403943.