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 0x27b3b35309fc75b028548dcde5cde00156293456a93247ea4fd1f9729102a3d0. 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/039d51eb-2e7a-413d-b7c8-dcf81fa9aa1c.json and https://artists.proofprofile.net/proofs/artist/039d51eb-2e7a-413d-b7c8-dcf81fa9aa1c.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 0xf439f88648e119420cea4e7d63fcc37fb803b21f0c66cf810bc7d5f979e7778b. 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/GBCEQ2100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405e1c28a8fad16abfe2b9cd691bf6df3a34dc382042d698c8faa39ac3bb3ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBRD52100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e602706c3e2d60f289880ba75fd7566e28a3258456c8ae042356aa148a67c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2485998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8e1f7fd21c129033ecd97c98fdbba4897b70f747fb8209e22f7203c8d57a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBQGW2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e59274f8a83d21ff36508a114e5e7e0dc147f6a5a8c9f8f83abd009cabf568. 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/NLM7H2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d413c76eb35a583ea07e2d4e6b7f9e2d47e30a5e7664cbe7040f689155bec32. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK42401486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950faac7b13a901609be2b3b3b3719e3a86389739bd8f517a5ff36078e8d3534. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLCK42235143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdaec7f6bf1cce4c3ce39e248af61fa7b66386780f4b9fdc8860f7a2ace36a3. 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/CA5KR2382717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d86bc3a67c60115c3fb335c38c916595da588d65fa7ed716f45f9b295d320c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBZSW2305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f2b0054a7ffc9937caacd3858806708e088eaaf053a98cb7a42e8ad672427. 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/GBCEQ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984843b85ed43e9bf8d7945a0aea4ba957e31c910c797acc3cbc271c8073d08a. 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/GBCEQ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984843b85ed43e9bf8d7945a0aea4ba957e31c910c797acc3cbc271c8073d08a. 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/GBCEQ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf25c31fe0cc6650f8f941e33b02a8b05e459955e25bea34fe6d36f4cd9e9432. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK42225445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aefd69eb5b25e5f84bd2f9e4cbf6eb32904debd4c683a9e28919765444e1e2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLCK42225444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03d64043e776aee9d16f086f02799089bd97af7823db2208995ce4827c21783. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2295796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8047b7baaac7487fe680be2b936f3e472bdbc22cbc4a4e9528653460f76b822. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42214174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa459031c75ab91937b4e06431aa1a94273f22cd277629e2e92f89d1fdde3918e. 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/NLCK42211608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2c0c54f8f8a6f0bfb3fcb67db00a37d6ef952644bc06a2a22cad68f07e603. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLCK42211609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50873164a9cb6987444eebe935ef3fdd790422eda139ff48114ae4e48a2cbb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TC2210302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2dcc86ea869c6c5d6e42660f65d87e3a3798071349964ff0b5dc4922518d9c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB6TC2210303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0ac2e2905c263ea568481aba04c81f65b841e5bc6c2902058e1ae8dbd33857. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB6TC2210304.