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 0x06e017a95d77525e9fbcccbf2ec83195c8ae67e8ef165c44915cfd7663d1a92c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/109ff1cc-441a-44ff-b47b-f01a46c1f15f.json and https://artists.proofprofile.net/proofs/artist/109ff1cc-441a-44ff-b47b-f01a46c1f15f.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 0x530a90e926b71446d82ceb083a9f4662255c166b0d546188891942eb1d6add7a. 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/QZNWS2221414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae5ba805880acb41e379849fc0c2f5a9092eac21eca7e08486930d206510a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFT2120532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fcf8450db2d9a091500a2ba3b2be8575e5c10857f22d78d09f505bdf69f75f. 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/TCAFO2190610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5adbf5c93e41139b2fb3f6a849ac73b56dc8420fdb03f945851979690b67213. 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/TCAFC2062034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3556f727e3fa6c056bb38b5cf4db57db458c0f28cac512983ad61d3f83e965. 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/NOUWM1801086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815370849e748d6979f59ab32c5701a453dc90dad2ef98887d6322bf62cd2b04. 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/NOUWM1801051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85fdc20db20f861a206f631bb978be750ff364a62c3c76e2a0cab6501abbdf0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOUWM1801047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf0397b592160613caa86bd6bebb106615dbd7de562b265552608a884100af2. 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/NOUWM1801049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288187f64788574a967657781c2d9d75c04261df6a6462d537144a5831a0244. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOUWM1801037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7fc17d0155b23388b8d2f9b8712e018534a8c134520b22d94f6439f803bcb7. 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/NOUWM1801035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77e71fa6728d5c6e25bdcea0227c737efc4f6d912cf57a6c8c12b717fdc2a37. 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/NOUWM1801032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8780183fb97dca9dc8c9d3012b8c0fc8e6b35cd5b72d1303fe0a304abdf0ed. 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/NOUWM1801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2366cf396e222a8f24579b5f8f5e4e02f6f7873372aa2fec780794b813d3b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOUWM1801028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921a2ed8aa5c19a11c68cc5863e796712a680b65d036bd5d92264b385fb208cd. 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/NOUWM1801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278ad35e2ab867b8a766aa8e57388af00e6819b8363ad11033e9c1423b39f81. 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/NOMW21801038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5e2c4ff19c4db468fc10002cf459aca15b2eafde7e25bf7ebdbc7eb1129124. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOMW21801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b08c7c2e34a7ba492205ae47d63e7a3598e361c97909cefceb11ae6400c49c. 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/NOMW21701038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d8874df6a4dcd8c9c82b837a0673f948dc7c594b9b2da64a603cc6d23ee9f. 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/NOMW21701036.