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 0xb27436fcb9f4b30d1760a9b2bea720c8a0ecc95403ab6de5d66f02d875bca9df. 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/e7204c2d-c35a-4b54-ac04-0af3134284b6.json and https://artists.proofprofile.net/proofs/artist/e7204c2d-c35a-4b54-ac04-0af3134284b6.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 0x887a0e073feadf41bc853260a7769fbfa878d22df0eeb062b91b20182f8ac14e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/NLRD52320640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c9f5d506e8ee2339211833f3d53acdeb6326ead0106701884ab7d6d6585f3c. 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/NLRD52344986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a031f11312742e8ef7fa96329f7c779ffab599fe0b4700c47697763678d961b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLRD52344979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d06df83afe37f77a6df522b57bbcc5e04ee960c2b33368bb39d25e6831e0fe. 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/NLRD52344965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc72be57082181956fd95e03713a7a9d18a2332b7d7286c56a30e6205b5063e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NLRD52344958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ed2882269bb52694cca76166d7518512e6bd4ca858dc33bdfe4084b2e0077. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/NLRD52344961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb47ae7704562f5738e160393c44650c56de4b254abaaf926ad9337c8941138. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLRD52344946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9632e0e866967ef97e691449180bfe0895f70049797755551ef75648d5ad1a5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLRD52345209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93513b7efa777de2ed2bb359c896f3e1d05fe6b7dcdcb1d55b2b2f6f4dc5a90e. 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/NLRD52345487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a9775729684000e405ed90643565b826c1e625520d133444eee2500ac2c203. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NLRD52345698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a603092d19d3e01c793d27995db0829cc61ebef6853bb8be2225b2e0ec0d90. 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/NLRD52345765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef8482315d0d549b319a140bd008e6fb0cf8b69ced45e710d40722d8e029dd4. 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/NLRD52345766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4963dbbeb458ce64e6891d1408b6095db50791309efe6d67a387591a5d250b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLRD52345767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8690e10d875f4cc895bfb76fd76aec94f98f1b4f5398939942f651c1f73ecbb6. 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/NLRD52345849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce26a394a5137886e9021346cb4d54f399fff9a0631e9bfbd17f1c7979f5ce. 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/NLRD52345862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb277d6934a898b7bc790290b8fe54d21bfefdf96939a04e1c0d063e0c6e6437. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLRD52345864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c77556960ebedba93c2af710774bde209d88b2601d49aefb9e12022311286d6. 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/NLRD52345870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb795089038d3c1976fdb75595795ef7f57bb81386b6d4c9f8da7e43288b5d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLRD52345896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79842d028e4c7f73e849b71f3ee30054077676eb1ffcc5164b7a5631f6647b35. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLRD52345898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1f3efe9d686fe0a390d44dbc5dfa4c520acb315129bd96ab12235fbf48dd9e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLRD52346127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dbca2a64624f6d4bc229e1043f6ab761d16c2d68820c1b77fe341dc407d2c4. 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/NLRD52346236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec954b0ea7a0a88260c4bb8d7a11a2462883f7daa1f81262bc738809a91d9e5. 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/NLRD52346246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c6b399ed07763b7917a91309ad76f28a52fb5df804b7873e344b2ba41eb3c9. 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/NLRD52346343.