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 0x6314b40f559832aa0336b9cbc84a886500e7376f0ac9c6d0c2a17120329a7243. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4e9af49-2147-4a31-ae0b-5ebe5240a88a.json and https://artists.proofprofile.net/proofs/artist/d4e9af49-2147-4a31-ae0b-5ebe5240a88a.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 0x6d8e0a5f560159222795441986a4f2de2b24116064ce8c3c8784dc01debbeba3. 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/QZ5AB1842085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77e90837b14676a905a5df79b72a6f25a64c4dbe1cea24abc284f839465c91a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZ5AB1900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52e84d3402370f2ca65f4f3d0a60ba2f7b529dbeca93b8c85794244117424b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZ5AB1737304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555b50629e6d869bc02ce4e85f0ddf4c69e10411a11d20fe4d3e4559cff7b93. 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/QZ5AB1959528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc52e84d3402370f2ca65f4f3d0a60ba2f7b529dbeca93b8c85794244117424b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZ5AB1737304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c0061061abf79a6a1758ebd6bc12c5c7111c8d8fe843eba2ef078b024d312d. 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/QZGLM1932763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32461145f586f9aff9e5fdf361ee5ee3a9f86bdfb329c0539930217492c2621. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP2222063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3173f0371a1f46f542981d75ff8521926d55273b2ab7da016d38e00952687d9. 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/GBLFP2222064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96cd27d817415d3297be33c59af767a3633fbe7cb11b41eda6741de5cef1355. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLFP2222065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216290f181faf4bb79d55fd1293dd119a5732a28ff5285963f4014c35fbdcdee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLFP2222066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0687b53367ad55c5a58bd36bf8e62cf79e17c7a95e3174d321cd6ecae3401. 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/GBLFP2222597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcffb527c151a2d7f4f557b6da3383535aeba6e27f3ea00acaf86bface02e60. 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/DGA0L2341847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db5b5b3afeb1d5910fb5173392ccfd0885fa45d0c08d938c748f1ea3ae1655. 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/FRX202526913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc600097334b723d70a781d24d889c33014090b8a887221061d2f68089c56f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRS182071073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337c25ec397c680732d36693442d6b1b34fc62804b0a8dd3616fa1dd96b000b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/MXD781805563.