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 0x67fead1e0b99da7beb73fc77fc0c046b1d84626020a61bfccad566ed0c244d7e. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82fc362e-72c6-4a0a-84dc-d23bd00fe229.json and https://artists.proofprofile.net/proofs/artist/82fc362e-72c6-4a0a-84dc-d23bd00fe229.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 0x10bda2ea9a5da3f2f5ad993c59747fdcbebb4469f627822d4176e5e398ea8426. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/EGA060920505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de9e6f4c6a43ca5097dfabaf485585328ce9ce718c1bdd204a2b85cf507cbaa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:53:52Z), 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/EGA060920506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeef86f588ed990ce133b54a7c0d1ae0f0483f54fdac8e6b833ca7814a163b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA012187620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb79b53200df3d3dd64788b60acccfd554bda05c53cda64b3bdaabff5e23703. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:24Z), 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/ESA012187566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe303ab6c02d28164b0e549ff20d5bdb8b9e0bfd36a494c80294b540f0412e5fd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZXLZ2337065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc89eec09acdef6f9db496042569461a2923f744d79643fa59779c94ec92a012. 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/FR59R2427222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63cbb547be32cdc2a22dad1d7b6e9a4704be8826daabbc3dca730a3a16fc28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/LBTCF2500378.