Underbelly is the side of something that is not normally seen. Figuratively, it means a vulnerable or weak part, similar to the term Achilles' heel, or alternatively, a hidden, illicit side of society
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a21103787663ca50478d5d0f58b667e2f87b483213a9fcff815e72f1b730d4. 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/a425696a-f7dc-4077-9744-bb04108b7734.json and https://artists.proofprofile.net/proofs/artist/a425696a-f7dc-4077-9744-bb04108b7734.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bdefbda44bfd2f76bac8137d6b0fbfd027cbabd52dd81e2729317af90af00c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES92094209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee01e68f38a39fd1e73216dec03f19dfae0456db0dee0d47607631577b82b811. 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/QZHN32069571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473389c4b2b7bef1cab0fd7aa7e84aa7f3220b8a1772064a3a5e26ce8fe8dba. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZNWT2132102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6de7b14cfb9d6fbb3d1c35d6851a8b19efd4548023a3baa63c1bea24a05dd1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CA5KR2229373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ceafbc2a4cbcaefb1e3bbb33b896a24dad6191485e9e5b4926e4a81340766a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD51632971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7ae199ba98adb0838362a8b88a05c4004a45f6ee78c12cfeaa6b859c2a516. 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/NLRD52023054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dc597802fe3eaf2f65a154da51cbb3098f6be5c8368de0b02a0ca30b42a4fb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLRD52023057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c30f12b1e71cbae2ad96d2dccac6f43abf66a207f77a0055bc9a21b3d24b8. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/NLRD52023161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a2225656094a84ef7180e1f5151623cd974bdbee4c37525c87efaf1c51ded. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/NLRD52023055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c8bfd67be32c386eb9ed9e4228eb00c5375b710ac54588dab52a24710babf. 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/CA6D22400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e613660b6ab96d85ea683d05453e581789f0cfaa5aba1fb1e973427012a6511. 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/GBKQU2319590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0e938d3bbdeb5f251404f7fdf405587fcd2addaa646b5877de0e77dcf59e3d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV61724103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b15f1bb329f601fc4582a24939751b7aeb3c48407a3760da2bc15d4d9f1d69. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUK3B2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247a4a752edd4ffb57c8faae676767ae4db4341711ea7519a63eb4ff098b70c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1871808.