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 0xd943665e2593fccd1845de002e8e378584b79752135e81dd50600a1daefdd5af. 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/27956f66-6649-4296-b746-ca83acc9be0b.json and https://artists.proofprofile.net/proofs/artist/27956f66-6649-4296-b746-ca83acc9be0b.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 0xa41971e285ca4c26e8061973a1294471a5aca68ae374959df00714797d31ae37. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH6542109869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339f5725191e173e7b1dcf455b1537c0381671bb09aef9442466e557b5fdcd0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542110002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00680f75100708555c2f0c5f0a74530594c62b31a4b73192f7b15a9aefd793d3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRDPX2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08386c7aa05b243a46455f01bfeb2af721d7ca47e388f7a5e66b24e587571f3b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FRP622200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a4a41963a1182bdf2b4684f399411fa5bbc387cbf87496e413847e71a81be. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/FRP622200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea613f79a965984ca0450f1852bad280a1e20690a55060e271486849da770b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRP622200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb6ba35c44a9fd295123e4b6d9cc548336eff59d0bf63ddd9a1f7bf8b15f68b. 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/FRDPX2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2780a245bfc71315f5b94f8687f66bc8000180c3318b65691e65ebcbcf96f67. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRDPX2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7407f8ba9e7931dfec1b7db794c5cd04cc0ac96d1df51f6a3f99d355131cd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRP622402110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf27156b1871d5598cfe8a5a0d2337cdd90e9afa7303a897a2a9ecfb2205c3a3. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FRP622402450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1de99969f35ae2ba5f0ec4ee96cef7fe60105909afea78949700f9daa76226. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRP622402170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657d3c68821a333e5bbbb7bc7b5636b9bb077c15e592f2145ce7d5c1e297227c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRP622402980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bbc9ced884345095d1ecd4087f1b55f574d7f0062e866bf0573c42b5003aca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRP622500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075bc9fcef48f0eed00964176ec2d15270ff9315f3d998e6e1cb3c43a9e63d15. 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/DEG932104179.