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 0xe9fe7a287c974066ff64d3143f4460ceb46872cab6f16fc87096fde989b8e4da. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5dbeaea-76f1-4a10-90a3-8573b0492358.json and https://artists.proofprofile.net/proofs/artist/d5dbeaea-76f1-4a10-90a3-8573b0492358.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 0x4cdbcf38c8a4c243dc01ffc8b2e72fbc6b11ac9acfcc5d63ffc76fe46c2bc974. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KSA002301345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc463ade57d0ca4a29004407ac782bef6d887b7c8ab42c22f030bdefe149aa8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/KRNAR2341181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9297861077f63abdf5c606495174ed8c319e73b65ec7f9aa80651e82685290b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:21:47Z), 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/KRMIM2443164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bdb397f96a204b90cddc2d57a8ff820705e524f2c2361b5399ee0b9fc19860. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRMIM2472351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfdca5a62f8b2a45506ff2bb1b2bb8e51c03683a602980cb666ace7a78d186e. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:31Z), 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/KRMIM2476915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e6c57e64497d006d13169d17a8cc8cb9b8af5e1b38a28dc2eee893e7c2316. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:47Z), 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/KRMIM2542931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ebafa2d0b3316e07a9fbdcddeaa4b00bdde0928212e8099d0cb3a7af219528. 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/KRMIM2545455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b330ee4b9c43d6e3e215969087bf1d6ba5e405f929467087cf9a332137b8a79. 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/KRMIM2559030.