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 0xf53f4f5c91db15f40c4d1074e9c76834c2119b0b46db85b956334a3857d83ee0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/480a1565-bd5c-4600-ab0b-12da1205c8dc.json and https://artists.proofprofile.net/proofs/artist/480a1565-bd5c-4600-ab0b-12da1205c8dc.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 0x62b7df31d123b34e7a65a35c5b25573a75b4bdc79a7432ed46372d389e9a0a8a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACX1710056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde34da5cbe51a34ad3f55fa0a0237a60d9814d62382bebf19c672e23045f0ede. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:00Z), 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/TCAEM1987907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26574f55bfb899c14a75a2d4fab00eea137a6dc483e1a789e4784e6e4943b0a7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIS2458622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9dc2af96432295cca421614c9309b26310998d3cadcca87d149ab1c215a872. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:38Z), 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/TCAIS2484735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97544ed9b09fc0993ca8ad5ac48fdafca2e6f619d58e094670cb5b38ec848bdc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:54Z), 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/TCAIU2405506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6513f4c5f805d7fa07a49b4c709542261269da04f6e1dedca0d290de30ddf2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/AEA3A2250259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1140c797bafe474779c623d98ce4552d48d8811c04321cc86dc00a1d0a5c1d0f. 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/TCAJF2535464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba134640ebaf1922a1ae816f6324e93142781b0b847fafeb292056fb839d10. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:20Z), 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/TCAJZ2595606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df05f642a57a20d6ca95af4543834234af5946d77ff264242b708cf6aa65ef. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT65Z2525276.