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 0x434c259c364ce72358e31e3317fee5c290f62afee9e9281764d0fa389f73d9e1. 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/bd14dad8-5967-4bd0-83a0-7d0bc0b6aa4c.json and https://artists.proofprofile.net/proofs/artist/bd14dad8-5967-4bd0-83a0-7d0bc0b6aa4c.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 0x25f82a6ce7baba7e7651abd4fe0199cbce56def4879121b354d889dbad801a67. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDTV1900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63da7625d0e016180348a15c8ab6e246dcdd7a36de70bb6313302cd8b163f49. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:54Z), 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/QZHN32048005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dbf569c392d90aebf8e69080b315c4610d45fbbc51b3cb34f289096b3d12cd. 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/QZMEM2133433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04903c27359a5e58f8a9e901efb95bd84f5ed315eba604b77bbef571c5e89d69. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEQ2117145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aebd0a0bdbed638469ab5625c23bca9fc3251c15b16a54917c0171f1ff17eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:10Z), 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/QZMEQ2109162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d2ad6722f32dcd84c1e9ffcaa3a389f98157fad40f1b29ef1fbda704515e21. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:39:57Z), 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/QZTB92201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee43a9af9f8b45c3b51642cbb0a726729a6dba8b78547db372e5ffa9fc78706. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZTB92201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5e786486dc1ce73891fd10359ed8864a2c23de388dcda85fe8e9e6d8ca718. 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/QZTB92201367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cf5c8038f28e4096041329f23b42e61d704ffa84971593ec5e57a1235a183e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYY2311165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f7402e0be4292b057eb753aff61f6cd8a24da4e12e57e2ad4ab3e383d365a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN42564379.