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 0x106b820631ba0e6c6824776f93bbeb73ede11072cedf01320fed5d0f5b75fa07. 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/73e5503a-a010-485e-9a33-b61a305db455.json and https://artists.proofprofile.net/proofs/artist/73e5503a-a010-485e-9a33-b61a305db455.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 0x8fcd31d4a2173f3671e22ee89c8278481780cea7ea3682c917f53ce3966b5294. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:37Z), 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/NLSB72300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9ddc07adcec8ae0b1b59ac70efec73fafb9eb1de965861506006e11a810213. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLSB72300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62551e722fb01b0918945437a210d91e82246225c3e9de34c3943e36001e4ad0. 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/NLSB72300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6a1bce2759d22e8aa4a1081d03a7ebee0b59bde1bfbbfdb3240c6034cf7005. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:55:56Z), 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/NLSB72300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014831f914298084ae04a1e57aabb4ec3bcd5ca4fd5a3640b52f5e6b8434ace4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLSB72300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac88c448eff69b370dd7cef76ec6458d515ee0cd6d1fc201bf1d2293f08da6b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:39:10Z), 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/NLSB72300533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51068cf4014e19911924a4c2d39101ca9cd0a7e27a716e3f41a329a12318fc96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLSB72300535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6073eabfa19d445a6e1e2e5f5bc2ea1923a4dab7b932616370597ed5585fc46f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLSB72400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272b962c461dc6fd722042935b46b5aa8c3d7920e086630c3752d43b4105a442. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/NLSB72400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660339cdf43d740cedc24d65c02a3e164a20a83c4850f07d424fece07ec704a9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLSB72400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bfe2624baca3a9fb173025b66b89e545906bb4d46f881e0e7ca5c44e41d70e. 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/NLSB72400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a02c24dcc24d0bc69ccfaef01b6b7c795e8ad183725a3cfae12b073c4b5f9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA0S2493736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeaf8fceb8dbb9f99d124abcab25a60232318bc253b49a159506c037282411a. 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/DGA0S2493737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e13470cb226ae2199fe315065782f0db5dba7777d4afcfe73689486e8f2750. 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/DGA0S2493739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf292d24880cfb423d71ee912ea26bd0056f36b969c8c4918eb6a0406b27e66. 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/NLT2H2500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e297732d89c65a7dde9baaca706deb9aa0f736581268b8e2ca7a935034343b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CA5KR2543427.