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 0xdf3b1c6c8b2cb93dba7a343360574e6c1aa46785e94dd91fcf64a6fff4a44e80. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ca0a36e-b099-44de-84a2-add2d82314a7.json and https://artists.proofprofile.net/proofs/artist/5ca0a36e-b099-44de-84a2-add2d82314a7.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 0x89e1b6e9d4a92424fb6c64072c2d198d47fd90297ae9cfda1c25a830188a5805. 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/ES7712162201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712be0be44da5c355cf2fe6eecc0a4e685ae1015df157e0a6a1c106299834dd. 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/ES7712162203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce2324a2461799c0021e78a190be3593c7f6f439212976ab5956ea4b38811e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES7712162204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a36708fa1a7e04325d21736bb1297b30974fb50abe3425dda1fd348f3fa528. 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/ES7712162206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ed614a10788d804edab3bf878084091b2311b85715e49f9879ae786bbfed46. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES7712162209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f152b7c3ca6c466d019101e4d869e1c59d5dda8909bd2a5e5d660ee7fac9277. 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/ES7712162210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16622137ac5f8370d5491301ae04dd9528a0ca4cd8c44edda097fd450b5fc4f5. 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/ES7712366102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd16d7e4dbf8bb155943ebef3e718719e72259cc4a0554e4e84535e7646f087. 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/ES7712366104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec42acb4a9efa98524aaacf0572a48fc247ff3490efd73377960c591be376080. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES7712162202.
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 0x581d30f416b4f7cf4add2769f19cfe11e3465c6df9d71b0be5746ed89537bc16. 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/ES7712162205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8619e152d1ca2990065cf3dccd666ed7477ea9d2418bfd450e64310697214b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES7712162207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c625602b47d53e2d311415f77a8f99f4b3a804317f081a70b512cb18affab0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES7712162208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f68912061b754fad9ba45a5ba7fc904502a474e71c8da3c917b6cc8fbda0eb3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES7712366101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e82773e0b681b39507ac2e86b200f4dea9199b209d80f8868efbc94a2316c0. 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/ES7712366103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45468da1e9fc140b57a5c196c3c11e6010f5fcbf0e74bcbc0c9f74999dd4a6e5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES7712366105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512eba107e8a665aaf96b286adce615fd20493bad1e5e43694998b89c4420202. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES7712366106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c43e8b73a670704e27ad9a257e61dd3fb4950cf0cded1fd01ce3a523d034ad9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES7712366107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdf8d366fe5221ee41fbfe1968f67eb5d9f691b29003ee0c6a1eccdb1bc590. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES7712366108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab9c1364f3773b3df9642cb1474e9431a4c40f0e0c681b47566be0400dbcb75. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES7712366109.