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 0x0d305706da3a29b7bccf701b8c2a28c473417b33a6abd4a7a61d96c3f0b08b28. 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/3c488001-6f6d-4065-9444-cedd90423d36.json and https://artists.proofprofile.net/proofs/artist/3c488001-6f6d-4065-9444-cedd90423d36.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 0x0f2a96482a4778cd32ee48091c60a77d17e14a56c0ae465dd130bdcf1cca1a5b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:55Z), 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/MAA172500765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e4e700aec440a7608f43288987d73dac50e60f5b0a92735a2576062c1d2de3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/MAA172500768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76396065b1add13632556165b3f1bbcd8c9339c58886c8eb0078481ebec1dc0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:58Z), 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/MAA172500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2e7493e341a3ad827e781bb0b77af5f63fcb43c15fa48289789e7d0d0f3fb0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA012047130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5024e7d7da583d27210ea4cf49219fd4ac07210ee8f7f609d0128a6afb4c0124. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/ESA012047131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc891fb0acdb4ab96a9dbad60363150bcb5a864c96c4d0632d05a729d0bf800. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA012047133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18769a764a5a4ace5b1e6ce3fa922e0141c6d634a429770973d21e4bb6261380. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012047134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d61d941f72b5b23838f069a29145ea9eda70ed81a45815f8873966eb32b44bf. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ESA012047136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1e1676ef001dd1f046a667e90302be4ecf297737f997cfe78007d8e5170bc5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:44Z), 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/ESA012046208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2b6b024b32bb597bd029ee4ce31a0d8f20b877145f951fb726f9e0952bb6b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/UKXN22326283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf232728ebcbde4e1985af8c19f96db03a5d68a0b991d7f62117797c1c40a67b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:24Z), 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/UKXN22326284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb961c7c19fcc940373a35a29d5dd664f79c7e991c1f063df78991c5d96ad578. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ESA012046204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8b3a6ac96428792b9e15f80c7a2783436f591166e6c3a1fe59a876ae47fca0. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:27:00Z), 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/ESA012046206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937bc89375cf436470e98fd82edb33107e9183201faf1df1f0327c664e7b4c59. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ESA012043629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf690b87a0aa465b34c02ec7b61756dd6d8f29408255f116d805b46aa34cbd0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012043630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909b808e96650c661e8b5cf5860654249526c3366e0f9ee4efab5f821fff3729. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ESA012060154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd27d1602ad739ebad98549b020bc4017c920b88ee5434b03498383c4020590. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012060157.