thumb|right|A dowser, from an 18th-century French book about superstitions Dowsing is a type of divination employed in attempts to locate many types of object and material without the use of a techni
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 0xc5319fa8317e6c0b43493118d2e69e6e225dc18e316f5789ec914624ffc7442d. 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/6810e2c0-0f97-4c82-a64d-c45e94eb3911.json and https://artists.proofprofile.net/proofs/artist/6810e2c0-0f97-4c82-a64d-c45e94eb3911.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 0x0110671c13e5c78cd10ad6c4a893c3f49e783cb4f1df7db28bf2a4683ad0f05e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USX9P1122663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fceeedebc616f0534286bd6a1fc12e27d4967103e85a983b705bc2de9a7b1c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:07Z), 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/QMQRB1200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620db377bf36a4fac210ca213949e9a0b2135837a5bd93380020e276f826af26. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:04Z), 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/QMQRB1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20cfac0d0a826de731856e807ff6a7bd7d6f2e1d62d853c94cc1f1f4902ebc6. 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/QMQRB1200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a8b1133c27ce72c84f129802d0e0bb0c684777625b2bf767ff6f77698f311b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:32Z), 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/QMQRB1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24302eb1ff2d9e3d4cacfc7a90fb8d58921bfec4903e0e2549951239b3d6055a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMQRB1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1786b8283bcf3bfb07bc1518e2d00594bb2c8621d307482281ff4720af730e3. 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/QMQRB1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2382559bc1e768011fc09489d8b247b4d8fa47676440a3f2d059a093a2898961. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:32Z), 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/QMQRB1300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22caaae8dfc5902ba677941afcee1941e80cfbaaa96153f76a67d87956645be9. 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/AUMEV2539135.