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 0x6a5788f844a75d56f4b457b6c34d434149f40fd78ac842bf4e0ad6f0d2af13a1. 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/ee51d203-113e-4d74-86b1-196b2c86cdb3.json and https://artists.proofprofile.net/proofs/artist/ee51d203-113e-4d74-86b1-196b2c86cdb3.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 0x9a33fe53062650b89bcfef917724e2a83961e1a03212376c200ea8418b981ba0. 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/QZTLA2408991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95dd53f6d418b304efe3f94942041f6baebc729cce4c2dbae9783c7d9a09b63. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZQAY2482622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3fe5f769e6770de4a3e83b2c0396c9b3e8d72529e4655b0ad9c5868e3dce99. 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/QZQAY2421545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b960e0fde61027f8db44bdc84db860ece43043694847bd23e34fee0d4dd2d83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZQAY2467505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ae899e68090eb2109f302f8341ef8ac0f0e18866d50982a6365e6094d1652. 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/QZQAY2425873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e7af8ca3a9996ac45fe3d082fa5df3e7c1bc18b674d1b50e75b226d2237a1e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS7J2437113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50580c176c7a33503e96936b415a84aaa7740e4f2bf514153b8bed475f967fb4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTLA2594151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993d9d2d8b8bdfb0055fbf3223ffb10add98cbd532677fe8798fe031bf27723. 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/QZTLA2523479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79263abb3b57b0a7115d6e9afb4f22e48adb8d3fd337e751e93fe94f6a4fb21. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTLA2540373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a8690a76fd7ef936c4776974afcd3a6bafcad42123aca9e933d00b1fc1a3c. 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/QZQAY2539568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fcba657270df608c98d40a9626a53790110bc2795a428c7a322682601dc38b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZQAY2566888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9d0f184a53506c7a23d9e55e94fb70e0e897b038dcc1acb65180733b0e672b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZQAY2523107.