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 0xf50f7984583d65fd73fa0d901615266ae68b54e1072b2efcf85b013e8fc95ed6. 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/1953c372-f20a-46db-a92a-d3858864116a.json and https://artists.proofprofile.net/proofs/artist/1953c372-f20a-46db-a92a-d3858864116a.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 0xd7f18fb9372881d7aab2ceaaa29e02911f60198eb3b866ffcfc07a86d11f7528. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82299486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee29cc03daf9a228b7cdb36cb1da5739d668cb3cc4e0ba9ebbb6387f68f5fac. 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/QZDA82299492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36a7388235fdd8e0e30952a7b7d42bb2b5adcb971cd14b9cf7beb8a033caef0. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZDA82299488.
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 0xccd7fe4cdf25de9be13d978fa77c37e5f9a4a68cf6a86856d429dccc316cffcc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDA82299491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb6010ffe693af9f7061ffcea6cde3c5b07135fa78720185de7bb888b6994ce. 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/QZDA52070182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc57af33c4a653550ff1f1db9645caea1df36674e8d9793ca8187efc56833ef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA52070183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b9704dc551f513546b2bfcc6c0f302df446964ea319dec19b961ddfef2bfd9. 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/QZDA52070184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04469f52477a60d3a7962be77ac95d4701f91eed35d41163dda7cd61b6ca654. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52070185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8543047e710f1975448d6e1e46d4672cccd29d2eb03891f5de38e4135f1a9d1a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA52070179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766dca5f95acc7a3d3aaabb0705264fc653de4edc4912c69fe4bbbaf45bb302. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDA52070180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe294d31f882d5ca0704156abd5f08c23784508c477d9b9ebf6b2cd777b2b9d0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZDA52070187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97131d2300661c75b91bf9a88696c4468e07b32b261dd9b2984075e13d3c8d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAS2150445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e4a04822959a06cb6c3cb3c2852182839a7456b11a79a6d0006b05ded7759. 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/QMPKX1811965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dd333beede52cb7234c83e3d95a8c3818d0efb856939b7800e4d52a0f04d34. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMPKX1811962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb9b9d4810854461ff3ee4e6f8df2a6bb6cdee2dcf546c2f57c8b6a8a2d540. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMPKX1811963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30525bc735805e290492df4b704513bb916eb8ba04367404babf91a4b085869. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMPKX1811964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde910a72768b2504c5510f6560f889c2004e9cb6d3c44a85dc6fab737f1dd72. 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/QZ4JJ1841050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d7fc9ce2a058050ef41f67dc543ebbeb42a4d3759c92df36ce8f3da6cbf40. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6Q2178426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6fff6cf6355b2c0efc6c32ca00edcacc4de811773cd2ecf0691570363bd92f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZK6L2074176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed33d52821bc1444157b21af763af9837985cf8fd262ac41988a71cbb5926e9. 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/QZES71873597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e775ed4f8eadba23a1830d26395345f170f9d535cc43ca4d25bf99fa4c9114. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6L2074183.