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 0xf76f3f85ef5e51da76d033b174ed274c31b963ec6a7d538424a9032180153e3c. 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/ec842991-97e3-4932-98b5-78d7d23eeb9b.json and https://artists.proofprofile.net/proofs/artist/ec842991-97e3-4932-98b5-78d7d23eeb9b.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 0xa3a698ad15a401d407cf710389f83d74fb6b7831177284c58c6a0eb1e5d88583. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6P2302040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5620d42e21b65720c1284376edf28384b10f3b0557f095e609cda5706cc6f2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6P2302041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c9f94c83a8f5ce7417ec46755ecbf1e140ca36ea5ac532982f9da1ef2d1bb1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEY472374445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc39183d84e7a38ddbd602acb82129cfad311024295a228baf20a88a63bbb5. 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/GBKQU2375934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5ccddc37677ebf27d610bab24762b1ca92a960e2e9c71923d58573ada7e449. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ22418828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020835b4ba72276f9e26538ced32a5ddb326ce5a2ccb85a4273be2d455dcc502. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:05Z), 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/GBKQU2398593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e309360c88f08b1bb2d5a08d50a205e4b67a37003d74b3897d1d78c4f7026. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:31Z), 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/GBLV62316421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf566344bcdfd683117360472d9539bf6adb4031087fa87a67d86ffd381c7b3c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2431524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63342e3ab3358c8f3fb6f7fab3af9d31a2194312f4107fdf17385ffbfafaf941. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62317731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf566344bcdfd683117360472d9539bf6adb4031087fa87a67d86ffd381c7b3c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2431524.