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 0x35f0ef9d913542c15c6fec46411cb3d24918650593152ee5f2cb41612c924b7d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bfd027e-5cf1-4f29-95c6-14b51b183c5a.json and https://artists.proofprofile.net/proofs/artist/0bfd027e-5cf1-4f29-95c6-14b51b183c5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ekbar Daraw Bondhu (feat. Ash Boii & Sony Achiba)
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 0x28899f01c2c87687c02d7ce0669aec26c5a9f57a09971086d65ae0b92e3c6236. 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/TCAEE1954510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6050984533b6126af194e77a53b236938af1d4091d08197ac2efc9eb9990a78. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAEK1914859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984e52f206be7c0e39d3bbc2b29d826224148d78f4debcde23bf97393f3c252. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:35Z), 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/TCAES2001464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c77580a0664a003e0c2b5836043e70b97724b4c9aa780e44e1af9e44a6a62. 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/TCAFC2015457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6135b653fdcb8861ee5d051583fea318b2a37c2ed4d945eba450ed1e32f58a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:35Z), 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/TCAGE2274093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec5f3933830848bdeb8a964c8b83c79d784834d15cacbe8fff516afcfc07b6d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:05:59Z), 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/TCAHQ2368749.