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 0xd9e1dc1fa350d2334937126d3d26b0feed5a4db5fd4d0eb14d4847e9761e004a. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/867dc6c0-b69e-4e27-bb59-61e138816fe6.json and https://artists.proofprofile.net/proofs/artist/867dc6c0-b69e-4e27-bb59-61e138816fe6.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 0x19ba2617bae484c7e3aeea37a8672490c897eb6b99236549f4024fbef5e7efe4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/US3DF1719475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e35169f175366023d944414ffc2f855c86943c997a3c5811d344f98fa41649f. 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/US3DF1719476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de90d6ada52835a8abc6f5f66ba7937cf5c6505052fc766cf429f140c9a8d1. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/US3DF1719477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af1c6e6bd40e9f57e1eddb9f47f5244377a2e49ed0052e50f9feb1d4be9aa6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:33:26Z), 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/US3DF1720644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6307544e6569ae59e5f794233b53a086184b610eb2fec6af169904bb46b9b8. 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/US3DF1720645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda19d0a9da3edb2dbfbe9123197aaabad8b8b27af653ee0efd5c3019ce6f857. 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/US3DF1720646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84152109f691c520a9e461295be9e6bd00ef14252f0538d19e302efb1b7f0b87. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF1720647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28043b3dd7788ac97d53ff0d2dc9ece5d21abd07433d0846a0d610b589d86bb0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF1707518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df2a5a042e9da589ccafcc1ab05032a0cf328b5517488393543c7ea4ec0de81. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF1707519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6902cc030ba461bef5d067385eed6a806a52087e95414a86acdc0aaaa6e7b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/US3DF1707520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23312e9dd0701eafa6436b361acaa29bf0f6185284d31472e69d3b09680ef2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:22Z), 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/US3DF1720444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba560c6e7aab2f6abb8a8937deb4877deec927223b2ec7cbd6421a3eef15a26. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1720445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4d14078d62af7290618685dda81121dd2d8ef161957f4d2bd6bdb7fca7111a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF1720446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3738f84420950a876646f52f4e3ae6ff65488bfdb3a417984a3a26e5eab9e862. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:37Z), 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/US3DF1720447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a75f136f863ee1d4332fa268d13c270515205c69118131c40f5e2ca677296. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3DF1720448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918dc0487dd7984e96726642ebc45d8f77c5beaa8b5648a28bdaed3ef3aa910d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX8KD2277928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579b23ca43697dcc023534c506fc89d27b598cd6ca2f4ef3884c0d5acde59ca. 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/GX8KD2277975.