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 0xbf1ae8f12048840ca9a4623ca8478992f5d78daf226b62bcfb3167a65d0b5300. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4419057e-06a8-445c-aacb-064e69b1f031.json and https://artists.proofprofile.net/proofs/artist/4419057e-06a8-445c-aacb-064e69b1f031.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 0xaa97d4c2caceb73909c6cb2974ecea5d8d1c98e477b280ba9bbe8b1d2e71dbae. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR3GQ1123270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a3a7f94051f68699ce36c2f955a8da439e575b0a5524fa1fdc63777d280552. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR3GQ1123290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5472868e4fee96a2ea95fabed7ea56054618aa9b5d341782bd070d53f412370e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR3GQ1123310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384f622d6c4387fa99e4bacf0d65c2b52d4e986f8904708ad1105c229e93e42f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:43:10Z), 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/FR2X41667242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91c7940cc3bf36686a3c8493ab511655f6ca2e7a020e9382c7ac4f54503d47b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X41667245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532ccd441ca6414ce50b6300ef1e1eb1d53896f7e43ee1c7f2f5c96d4d65263. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:33Z), 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/FR2X41667246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92352a31a2a3e2da7d659bfc3827d3df9da708b392dcc4f35f8a1088f99a8035. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR2X41667249.