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 0x74c4b4c7cf9023a9bd3ac249cc1203c4e34b948a7361076f3f174c11b394aef6. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/433ae99b-cab4-4b16-a3e5-87160b91a299.json and https://artists.proofprofile.net/proofs/artist/433ae99b-cab4-4b16-a3e5-87160b91a299.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 0x71c9d0cfe31fbbe00894c4d291dc78014b552e7b4857e8a10e730c969fc7ec03. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:13Z), 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/SEYOK1518462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e951d84e0a90d0c48cdc85a7298bb1323db54d538b2c3c31efd7af0b3d88b9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:46Z), 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/SEYOK1518463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2de0966153ffe58fd1a380d61ee8151ade28df003ac11e52da8e18778a3a26. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK1518464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e03c81e9e2bbb18707aa08f1caf37468e33858e5cd9ae4c2c052a19295a9e3a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SEYOK1663833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e5439481498458265de135b4875b5b29d095d2501334b855d832f751f568d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK1814990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cc5eaee345481e5f6b04a2d2f609f13cebe5c1022973ded273425b44f0052b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEYOK1904261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6b887cea0fb966c41fbf51d1f4073028a4d7cce749cc0e7acc10e52926d7d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK2405181.