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 0x0044c8bdefcaaf31f14050ffd9dee6397dbfb0ae0da86b4e9dc404a6a56f4052. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6673a7f0-336f-4526-bebe-742c4c462eb4.json and https://artists.proofprofile.net/proofs/artist/6673a7f0-336f-4526-bebe-742c4c462eb4.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 0x63ca53c2466c6549b0ddf4c52711b67cd69fe3f6b63eac0e91ef8118cea82a59. 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/GBX721400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf94c39b8a0f294bff21f85fa8c84c2e318df5c6acbae18c50e9c670eecdb1df. 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/GBX721400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e6465a49846ef1e76a47e494e9d8356b97abc85e9dfd231fce8a2650bf3dee. 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/GBX721400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48639ae89d8b69992bad2201a3a9e1b9c59494187afbab96296598f091a2cc2b. 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/GBX721700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c401d1fdc37687311a8e58b30ff9807b65961836ea7fc8f2014295519c2325. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBX721700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9791567bc16cf00f2254f0367372c522cadeeb1b511b6c9f24c3f39b32a4e87a. 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/GBX721600238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fca6225a29328d327d1c330fb53c2f54b2f381cb4314b0d70896254db1470e4. 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/GBX721600241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c1d04a469c342abd2ce77d57b8e37dd327afd286c784327db40651009952d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:26Z), 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/GBX721600244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25be8a5ca2a58d7127629085e7b56badcee4180e0e20ca0aab5814548efbeb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBX721600245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bf495b768a65e1a761ea79734560c229de475d58e7d7f07a9bd4c105139adf. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:02Z), 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/GBX721600247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8089e373326bdae05c983b745ba17bbc046b1bb7fc7ae83f0f8516c5e635b5e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FXR432527491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd3597a69a5d627222b84c5aa55d7109a01685811bf2f4a568e680593ecb7a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FXR432527492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd6f8872a76637472be627de5f41103a767ec987c8b693626f3c6071199b12. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FXR432527496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f64075bdb4d4d8c7e8a9199281a3efc9c021eb4ca34983562c0af463a03f02. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FXR432527497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fcbb9aafdf1841892e0592e3db66b47340c325c5545051c78a59bfca2cb34d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FXR432527498.