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 0xe28a957390773b50b17fcecbdc14b72a4bbfec2c18f4ebf8cdad2171b35a31a6. 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/52ee8ec4-c84b-40ce-98bc-265a2fbc846b.json and https://artists.proofprofile.net/proofs/artist/52ee8ec4-c84b-40ce-98bc-265a2fbc846b.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 0xa75c9b5842ceae22765e51746cbf5a581e3db65273db8c8bf273d47bcaeef655. 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/FR8FB2118520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea17c62c8b3650571cc585f2549ba7ac5be54e810c25c83f9a3f49a46a29a09. 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/FRX762330022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea17c62c8b3650571cc585f2549ba7ac5be54e810c25c83f9a3f49a46a29a09. 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/FRX762330022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75c9b5842ceae22765e51746cbf5a581e3db65273db8c8bf273d47bcaeef655. 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/FR8FB2118520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b232a7e8691340f0ce10b54dc3ea7f8cccc71aff3d2ddf970a4fe38d76182. 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/FRZ042300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59d0b6cd1697e9861f8645d1af8a84d097e5f77c58ddf55c8913c07e9f93856. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2351554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafce1a385ec04e0c384fe428b016b959c197900d65b9bf0b70c1c78623048987. 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/FRIDO2411401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a9d0d9b642c3afdac5dc08064e2dc26feea6ab0e14d0995c12a0fe5dddc07. 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/DGA052457156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a9d0d9b642c3afdac5dc08064e2dc26feea6ab0e14d0995c12a0fe5dddc07. 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/DGA052457156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693b232a7e8691340f0ce10b54dc3ea7f8cccc71aff3d2ddf970a4fe38d76182. 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/FRZ042300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e68722271577496b900191a5bfecff04ad78359e94f8bb5150efc640b2017d2. 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/FRZ042400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafce1a385ec04e0c384fe428b016b959c197900d65b9bf0b70c1c78623048987. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRIDO2411401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f91b4f472f547dcf1a5f22c8c45b851ccee0467ec034e7e6e8d2503e0d03998. 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/FR9W12301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946c6cf72c6d1178497e942cb26ce594120603657c4800539fdd71f240e0484. 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/TCAGF2274520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccf659b9429f6a69a593ae8b59a9810e1cdd3aaf15e36163c1625bec3323df2. 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/TCAGG2204522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03412b72ae6bbc19e929f8973090d1f7283778399687ddbf0150d9a5510003f7. 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/ZA41S2224610.