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 0x22a34aaffe05c33fff91a0967b31bc40356d8f134b401d8e6952edc0696535f5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad7049ee-d715-4e1e-99a0-153d0bf1a3f1.json and https://artists.proofprofile.net/proofs/artist/ad7049ee-d715-4e1e-99a0-153d0bf1a3f1.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 0x59d9ce552186b2147cc17b12a4ad0f2f894f86176f207317e6dc06afd045f073. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:00Z), 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/USERN1008770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19840520d385a1a45471ab16ffc3581793ee33b9667df0de354eb5885a53d312. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USERN1009183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebacbaf0fbce8881cdf0673571d0cd09eddaf485709c83aa4d53bfbeca452ca. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N1965989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467a033212cfa797e6723ce0ec3637a463d79fc6898440249170d7bb70993807. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6N1965990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529de84158a7b335ec251cb4bb9029c2c1a92ce3e4f2ca9366e458c0c43de3b3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:07Z), 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/QZK6N1965991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78217d51c11dc4f37b722d63b90d252de644b5868cafecf53f09aab7d27e8a0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:37Z), 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/QZK6M2018013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f2ec8828c9377a1e631b3f2e4ed01be330f5423da3cc2a92b2d53c701682a0. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:25Z), 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/QZK6M2016728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9aa5be00b81010d322596764fac826825f022af629730e0d277148fa4ec203. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN52457610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9af5673fad7ba305340b9f126d1a7cfb72f93208721781fa7954ad43e307924. 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/QZHN52457611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e38f44732b699d30dbaed9268240d68dcb6fb98bb13a34b1d24b97fca3ca349. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBA2435899.