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 0xbbd5a4e0890b3f68c8e512dd95de1961977963998c8171d00c12db2a9feceb1f. 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/0fd2f3d4-a183-433e-aea9-447db6ff3ee0.json and https://artists.proofprofile.net/proofs/artist/0fd2f3d4-a183-433e-aea9-447db6ff3ee0.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 0x4521c4bacdb9b25d20c75f586395db45b764ff7464b51cf0af86fbb82e772f52. 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/EGA251511799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb19212c2de28686956e725d1558ab0a4c614a23436ee719a2585fb874505f53. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/EGA251511804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd85dcb50acb3a5c97775619b312d7b874e173386b7a8c685e6aa92208ef04d6. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/EGA251511755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97454b7a654473cc9bfc6c1c2e5f701cdde66757b5863fa1296bbc917c655562. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:08:52Z), 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/EGA251511788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98ad72efb21d020ed10fda98ab828eb5790a7e4a96fa88e7bd35de49fea59a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:25Z), 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/EGA251511757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a95111822f678e134a3bd7d74907932e0decc9047df50333efe043440267af. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/EGA251511739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3a6991dc5cabd99add76f28e3f73849e63fc558b8b9bc1600866b70894e319. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:04Z), 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/EGA251511760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab993e5220db7fefeba98f227bed97ee8f9e69b3b3c0260dca7eddc43ab564. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/EGA251511724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fd8eaa13f81b3e0dbe50e414d12e1ca96ee195cbe3bb379337f3c10dc23c18. 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/EGA251511787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca6246edf61af6ff34fe6879f48b6a963defd3f4130d9b275ab89f1efc3bce. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:52:38Z), 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/EGA252103589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034471568deee43f4ad27c16b3e84db131d7a00173a038b1f0b23c9d760bea9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/EGA252206015.