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 0x6958b19e8bea05f4ccce19874ad5c72b8c4fa1ad0022e44ce578264a47a7a824. 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/38bb7dae-0875-49c2-92af-830bd936baeb.json and https://artists.proofprofile.net/proofs/artist/38bb7dae-0875-49c2-92af-830bd936baeb.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 0x97b3cc9d712d62896b9dcf92a02336131b922a5926d3e73b24314611e4909688. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/IL4551004491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0372b947be2a9b677b7bd51f80081e002d82cf83835645f9364757ad63a4bb9d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IL4551004466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd11903a5e53d95f66532ea63c8a4c45c9131d3144d566bc3713d136d4cf78ad. 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/IL4551004180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e26583ac0a87ba97bf974c7a24527bbd2b551908ba6c8dda981081f710a77b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/IL4551004199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce64ef01eb3b9883567d6f34ecbfcf34003d56c8af0e5d1033e19cdb9e5490. 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/IL4551004182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f59ae8456327373188478063a995d60db824f7ac40b6303e7ee6378455978. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IL4551004561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4fc16b7e3a43374e349f1401c8f48493672858d576423ffc7c03270468f718. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IL4551004566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05714422bd632a40c29c67d79260b9e7204c099cb204e4312b37ae75a7a99b06. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL4551005630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab1e1a7480ff818a7b93ad74258a469598bee1322e103ce12f08a1ff94a0bc. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/IL4551005652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6cda5ad08e74bc9a6e9f40a42e2d2fb55ea926b06d75f5a6078ab0c433c39a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/IL4551005628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94417797cddd909c90ea3b795e5ab47f2add7dd44b13efe15995d2759767ce52. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IL4551005617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107e6c6c82caded6ae29a72fe2570deba00c861800bb2d807f8ad0aaec04a6d7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IL4551005651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68f9be684c1ac935dbdc2e64c6eddb29edd73b616e1ec515a47f12b2cca206. 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/IL4551005620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adba4cbbbd7d6308581da3c38a1d0e1eb6cdfa815542345130bd5593f1783da. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/IL4551005935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd2a056df2edb966d365cf63d642be831f8187adc3aaeaf7b55b4937eb8761c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/IL4551005941.
נעשה ונשמע (נעשה נשמע ונשיר בחג השבועות)