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 0x71be7427c602c9f085af686a7154814a7e12f12203cc0b7f78cc206015a4e022. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25ed1942-9d44-40d3-b819-727f1ff1c589.json and https://artists.proofprofile.net/proofs/artist/25ed1942-9d44-40d3-b819-727f1ff1c589.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Simar Simar Pooran Prabhu Kaaraj Bhaye Raas
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 0xbb21c41c79d0326e0f36f5a090c6793daf5cc2af02c7d15978308fe1783eabe9. 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/INS181400841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57570821b3a2d64e7f6fd1453ff6e2fdab4238236b69bc918887563da964a8c3. 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/INS181400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e13c6dd3c504db31e77680b87cf176c42d26f7a0ac3d9a1968f1a793a015b7. 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/INS181400847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565df18cc7d089b0e404cab80e6af46df0b08f78b600e8ee20ddabd2640f9d6. 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/INS181400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b8e86cfff7b6ccd65ca6ec90d374bcdabd34b973b44c8adce033892eae7e3. 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/FRX871583817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeedd556b46b6cac009e36a3e7362fd2e50ce81619713da1e5eed0e2da9c9284. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX871583818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef40f3352aeb48aaa6251deddd27ede5e6025b7c0df113d2419e8630396cf560. Chain 2 (Bitcoin): anchored in block 957227 (2026-07-08T21:49:37Z), 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/FRX871583823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a914828f759bedc5f9c62c9b90eafe83dfbbe271ddd460cbdb7df739e7eae4a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/INS181501156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30db3553d6d2c3589f097ee3d6a260efb7278529f80b9c48e9bcdb6769772e. 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/INS181501157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae379847d3cde66d7de19afafbf657432b5a25fccbd2052d8c9464bce7f42812. 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/INS181501158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88b896f365f2068c5fa36a325506c2ba11beedff0529a83ae0d3f58b8bcd0ad. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/INS181501160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e08f89ed40da5a8012d3c7e69de2320edafb968f9ec4f06fa6ed077c684ed8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INS181501161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e70ec5dc6169c1838b9f50f7ec76dae22de2a915cd5596ed54dc188389b0b30. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INS181501162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e281f99c4f127761f2cfea412f7b607041958f0ce579370f61685e24a07717. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/INS181402281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759466aa4a6e2a812f18ca04584365ea05b61db0307969da8e1d2b8f425bc38. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/INS181402282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1368b2e810176156722bbff8db945710b9c45211201530f55afadfbb1d335889. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/INS181402283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffde9a13f62f5dc24cbef0ffdc1429bf32b3542a7fef0039803b218283e0a3ca. 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/INS181402284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41351752981eb3b3de3b61ea1eaa02f4bda002a5c530067d98a030aabac41253. 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/INS181402285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0250556e2f21c30fd2da57cd0afb4e227ce83297c0d05c7f63c4e61015ed8b7d. 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/INS181402287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792be5c50c084b0777ef4e1a2578dce7cec5ed258b134e11916b37ade6bbd147. 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/INC622216876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853604b4821dbafcba5d5ed5d5562e37c7aa83e195dcb86ead7a6391fbb46f41. 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/INS182301797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc46726db15c95508c18217f1eda8172a102e1a189b7bced0e20b08a437825d. 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/INS182301794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d173b6643a877c7ae7eb303569e035e1a19b0cc53184019c6a7572b0c6f2a2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INS182301792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69956d794f35ecc53e37277254f0aa5cf478b6800b88766a984ade0bc94bd742. 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/INS172308014.