right|upright=1.35|300px|thumb|Caliche fossil forest on San Miguel Island, California Caliche () is a soil accumulation of soluble calcium carbonate at depth, where it precipitates and binds other ma
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0074d1a2f9fcda2f430912fd47807ac32844e2228c31420d02bca9908f226129. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da86e7f8-f72c-4706-adb5-114d6c95188a.json and https://artists.proofprofile.net/proofs/artist/da86e7f8-f72c-4706-adb5-114d6c95188a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Meri Soni (From "Dance Masti... Again") - The 'Days Are Dark' Mix
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd7498b87c1b7acb443affcf5e721ebf49e3756e9c8dba851cfa2a32bfce75. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/INS170200011.
Dil Kya Kare (From "Dance Masti") - The 'Love Is...' Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27b3c24c3074d403e73fe24d780f9b3e6501fea0f0102c063d62bbd43e9504. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INS170000575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd7498b87c1b7acb443affcf5e721ebf49e3756e9c8dba851cfa2a32bfce75. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/INS170200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27b3c24c3074d403e73fe24d780f9b3e6501fea0f0102c063d62bbd43e9504. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS170000575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd7498b87c1b7acb443affcf5e721ebf49e3756e9c8dba851cfa2a32bfce75. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/INS170200011.