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 0x9ba696f19d607f55af5c8011a13f1a15e27fbc3fee659eba911c2bb80d8db984. 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/521b360d-b9f9-4e6c-94a4-62416fa03b61.json and https://artists.proofprofile.net/proofs/artist/521b360d-b9f9-4e6c-94a4-62416fa03b61.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 0xf32fcbd5e9c219951f846c2d59d95a937f8c19c3989f6a68122240acd9ba9173. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USCGJ0677367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c17502013b6ea27b9360a2525a2afa2e465004f219a5ed3d00cba65d9d62ca. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGJ0677368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0033ef3010670df12df7b4003970d6a9673baa926b60861ec22bc3dbe5e96c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ0677370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90524dac2b84bd02f743220b0e2b83c0979801886eac48dcdd705b839299e90c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USCGJ0677371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a062de6bc1e9de763634f7304efaa7d6623c035c0f7c20f1292560ff8e1683b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM20646693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309383bbc327310a76a54d6d2244a4323205a711cbe6fe4e4269fb1aa650a10c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM20646694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca8b0304d26d15b273d735fb5bc69b213b5ce6ee8b4732803d1d58b270bb12. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USHM20646696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcbf64592a4875967c41c02f61031e6f3c6432e2438309ff87790fb1184b388. 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/USHM20646697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72355d09683af180b10c154c41979372e791cfcac78467057b211d9ea1be8bd3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:17Z), 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/USHM20646700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c9c65e005ffcc7f747a318c42d1373237953c51527110f8fbb82c9d02d972. 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/USHM20646701.