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 0xf2c159993130d2a7b756d5bc7efce84869aaafc3f5e8a282559e23a6e448c3e9. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f20d787-1404-4749-b16c-f9ec69451610.json and https://artists.proofprofile.net/proofs/artist/2f20d787-1404-4749-b16c-f9ec69451610.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 0xb29d3f20280a34a829d1984d4b20f07ac9d42088c3ffb4d66f8c72d8ee32aead. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/MX2832545972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad25a88af983b3cd9202dc7d6f51629461d8b0a427d6252954cf8fe22e6ebff4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:39Z), 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/MX2832545973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d0b5e4bea43d652cc0e7ab2ebc7abdf8919f2c170fce12a4f07e8e3dcf2c72. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/MX2832545976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4037438dcf48052c3d15806d491ad98de3aba95197f38b929fe4ee0012df2a4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MX2832545977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823955002e540d5b1b7462934f24b43c1de2f61582460eaa7a4c281d2bc57abf. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/MX2832545979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeaf3626fc58c8257f2e15e06f2ba6b952c061da0806a489d8ca6d37c86f022. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:48Z), 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/MX2832545980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457128b86a1a72b0f4017b849d029f8b801af65ae6e2c546150ab20bdf682aa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:22Z), 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/MX2832545981.