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 0x032faf8b8018e42c50dd5bde92dd2b5d17138d6ccbf942d7f8f0d382d37e5c8d. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ae4b329-7035-4927-a2db-8f88360621eb.json and https://artists.proofprofile.net/proofs/artist/7ae4b329-7035-4927-a2db-8f88360621eb.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 0xab79d0a6966642729b56a4cd63ea043dbe2e7977c0acfda2428f747b9beae8be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLS2016339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3f5c9afa0ecc0bec05445efdd451729c9f3bb7d30e1de3c84a008abe691d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGLS2016340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9326f9937005aa0ff31372af1ceac5a7f870eb1051fba1b63e190a051e6d0e69. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ62043579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb3152bb7e2e7b19e63c705b3c7a3c2045a2b5739d9cfe016a63e6b1e3e9643. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:23Z), 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/GBRKQ2119231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1b683e5de15805e4604923c9877c61036bdaaa0a7015997b7d37dfc54d582. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBRKQ2119235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22402177957c92192919c4f47d2fcf067dea81da5891d4960f2f8bc9f5f8f553. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:15Z), 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/GBRKQ2119238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5be476c4c85e3d01144ce290669b47aa7c3b2e46519f764119c41ddbcd7bc3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBRKQ2119244.