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 0x90f45f37615f20d1862ee9c6c4f6ce0ef1369ffc4a4882c79e4f38dd9d6739af. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7b1191e-5f84-4572-9ce3-61e111d9fc74.json and https://artists.proofprofile.net/proofs/artist/a7b1191e-5f84-4572-9ce3-61e111d9fc74.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 0x9eb704db3ee5334fe79cd97a7f7b8ed15d089b14e53acf9be459fb06a763991e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHNB2284795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcdeb78bd9a288ca7484e3648ce327ad1df853546b7c8af04c908f7bc74f2d9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:51Z), 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/QZHNB2284796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c59bc0d5a6fc34a80c91d32c4d247b3caa948a860f7e76d5fe88e0db5e5db02. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2371131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d3592735aa5aeba8c02214d7bc20df63c0cbd7c33d8ac23b117f08adfb1aef. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFM2371132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93b4bebba6008106d01c5a3c0bdd62c06736f69034243666915c9bd61218be5. 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/QZWFM2371133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd887e232e79bef3063c7bc1d920b0151572e7e787ee472589bee3296a1a65. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:34:49Z), 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/QZWFM2371136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deaadd1d9b11694833551984dbb342a98635d47e2df5aa0822b0b903458a16d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:21Z), 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/QZWFM2371138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f91989801d950df9cc9f4c2d3bbedbd0bae5ad67d2193ca4be22c8a9d0f2366. 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/QZWFM2371139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b679c172fb72f597c1ea294c8399cdfdb7d1dd4bc84e50c221dbf493879a3f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5BU2494964.