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 0xc5dd1defa12bdcae3518cde55f44e79981f736231eff80003cb8cf5b912dfcd3. 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/7b0bbd84-6fd9-4e70-9a43-516640a779d2.json and https://artists.proofprofile.net/proofs/artist/7b0bbd84-6fd9-4e70-9a43-516640a779d2.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 0x78c844521f0435db83776515795315ebce0b25902e7b9aede2bbcb77c7eb16e2. 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/QZN882214328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362146001d72be4eb74eba85dc95d02229e2cc3e431188f70c8c2b93326a328f. 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/QZN882214329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8868a623a1851c10c1bccd13b93339ea0b59c015d99f21b32c13116d9baa7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZN882214330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d073f47057ec223dbf9e842ed959a18ff8353defeca6c19a5eca706bafe80cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882214332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50491805b2169e20f46033774fedc84da9cab053fbdbd9b10c3c5cd08339fa7. 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/QZN882214333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87074904c7fef5e7c3adf2931acdf2e3bf0d8111e459eecb2344f0b4503661aa. 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/QZN882214334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed08102fb54e129eeec2c88dfcd07de92dde7571d4321c414abf9b6f038d169. 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/QZN882214335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cdd3389effdb332d62d513468f47f1c5c477857a26ea74a9b949f00feb647a. 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/QM24S2008307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e95d7ecff4fcf9fd9c801d29a42518a575a65161e003775086b52f0e7fdce8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2004506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab34bf90ae07c2b875d9a51beab6b1fd977f5ccec061d4e5172926ec4822077. 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/QM24S2004507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa6c94b62d9b4d5026d15c963d8363ab2602fd2ff0c342b60619c4c593f03be. 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/QM24S2004508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a73c08b974f22836f5a23f1695b0484265888c152a2402ee984a9045a1f610. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2004509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016f383b22412105fbd96ee73979879d8a3408e22801e53cc03c6b52931c9bf4. 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/QM24S2004510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da0f6b060bc243824e211cff3fbf4fbdf78dbe45102b98ec061afdb0b9c5822. 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/QM24S2004511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0600c4c75bd65cc40e8436dc251c4c55a14b7cfea10d0e72bef81da4adce04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S1925505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda9bf7a92fe9b9d1331edfecfd1d83d90153bf07ecbea165b7d3a6289eee95. 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/QM24S1915046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a18fab5893b58c93b9532a51d5360e208edb9b15c39bbd230e89f23688185. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1843870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea13dce89e85afb92e86c841d11d661d7f761f19405ae3a53ffbee692e5b41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1824681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72251ca4e855cc6f1ba6dfa667be6d07d648418401dd00fc78496a4e6af3815. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S1824682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6871109d336e523ca9b56c5e3e51751f7d23a8774c9677cb9b09708b5669e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1824683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5d0c80f755a66b2394a2c698b790cf81540c0968d4647769ca4e1855f72ae. 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/QM24S1824684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7056f976492c2423e89d287b9cf714b80182c6869a0e18df40c8bd24aeb8c66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S1824685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8554ae5b04a1bcb6b74606886ba474a5d7abda8c9a306ba17edffdca78c7857d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADK1734307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef0730dc3f9e6ae8ee23a13efcb18a2c7ca45951ec849d28007e1f757330cbf. 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/TCADG1719861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a26eff3896b4ee482cc070c929b17748ea8bdb6056d9a41d777df0318b9a3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADE1718036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca01715be0c0733a761fcf131469fb5e2527100302d6e877dfde0fbfb521a8a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADD1766293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6714177172ae2ebe7724aa8d2262ba4622f89d130d0a66091a8402ccb48ca774. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB45A1901543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409d6fbaf072eea8edcc29666ab213f250f8c0fbfa5f135d9bfce0880a61021a. 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/GB45A1901873.