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 0xccd63b53c8c4754d12a441fb1008db8ea687b1704e117388381c18e1d0c01656. 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/b2367707-a669-43e7-9218-fae55a237b61.json and https://artists.proofprofile.net/proofs/artist/b2367707-a669-43e7-9218-fae55a237b61.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 0x0df5eb72981c12a9604bdd043d4cccd06b3e36aa540f3b3fdcb5a6d6a8438d75. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/INM231600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1e617240a44486a0689ce097461e91d85d81c089f6c7424a9834b545b64088. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/INS181801794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c71f9f88ea106dee9aa54574876e91ffb4d3c6d3f040205ec3d9e72825b2391. 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/INS181802950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd56391ccdfec301989bbd0047b9c446dab04d46e15dc4ec4c5e4b3cdc6cb46. 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/INS181905252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecdc541130eb94af52c127161b2f9f3902b587530026d94ae5e91024c72af04. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/INS182000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6afbe4e4b6101a517f57ce68ff91d1209885970fd96322efb0e76ac3be9034. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DGA052082068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224f7c2aed204805f2eb275d8d82070d5f6f2347ec0505bc973d6fdbee30711. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/INT132100217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adef515a11aa369189d03856e4fec093bcd14505d802549154f1fc9bc5b75a9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/INH102100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe307f5164e20b879b0329759a928983cdefb4d56bf4a6bf38e1429baf1c299fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX762143248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7aafb9e78897cd688dc5dae2cb1c5c0a1ea4f078743773a29be076dcfb1091. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/INS182301042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a28c1ca375b9ba0eec8ba7c8fa875ca0e41b515be5b247245076bce0b20529. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/INT102304132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4817377ae934b92e5439e021eb57081680bfb01232a327d8fef3192255a37217. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USA2P2326515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc02c3218465984f99251a262d6fd03a50a8e7f140263b034615eaaad73899. 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/INS922300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be50db8d641e9a80a27423334a79e95d57d19432aba5ca322e30730342d3e76. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/IND372203514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a97d224a6df9cd6953fa8cf93261d76c9d5ac4091611f8fb47f3bc86c9ad37. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USA2P2442045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd6b17c924ca89239dc04e51beb2c765d3f4664cb52a13b3c657f685f7cb634. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2459783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0727f902f58eb008cba48770d740e60de62318de818b5bab7912328d8f38054f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX452571053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419fd0eb6e3928d2b42ee3e7508c91678a008f7c8d72ae04c9f2cf3e4ebfcc9e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/INS181900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795f10e45c9507112f5249686399ef0bc5cd97413c3d7f3499c40c648349676. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INS182400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d9ae9374f9f79d164290e0804a687f872df8822e2a93f73661e721c143bc4. 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/INS182200306.