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 0x7dce763864b2340bf59422a49af4018d53c9ce0e55f2d13349a7326c5e3e4680. 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/71ee564f-5252-41ad-aacb-aedc932d7663.json and https://artists.proofprofile.net/proofs/artist/71ee564f-5252-41ad-aacb-aedc932d7663.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 0xb066f0ae612984b63b8b5b18379c362327da02c5ba48d7e281110dae0f96e443. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHM81719819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b1e5dfeb801fa47791343589833f5fd96b5aec1f45df422fa16d13642b3d85. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4Q1859702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483206b4b9e8bf4cbe66f620547265638ee8556ab1861fb0dd93da32ea39d17b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:14Z), 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/USCGJ2036348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44139909e5490f5ee7649f127278ff1595fdf9a6c44dfa3234fde9292bc0d350. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM82192796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faf8fd5620ddfe83be8991a4b3d4e6e7fbb296c4608e3812a361e46df8456e7. 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/QZK6F2242554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa7b3520bb5c7be888a7f46e69c993520a3dcdb3e041b81e0fd991034f439e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWS2268514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815ad75bb8097186805c445e60146bd8340d9b04c6607c6d9a10295a99b8b31. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZRP52289566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f951d4ee0a0978b43e3ac93252b2c5ea35abd0326c440c1835e9d55d1b4564. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:02Z), 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/QZEQU2401641.