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 0xb19ced9477c90b7d78041b129734b26b8025b41a64dbda789acf72107de325a9. 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/88febac3-c6a3-45da-907f-8ae7301cbdf4.json and https://artists.proofprofile.net/proofs/artist/88febac3-c6a3-45da-907f-8ae7301cbdf4.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 0x6bddd1ec8cb9582029da0bd41590834e3afdcfe19b2000ffe6991dac7e095666. 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/BR3T81400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd742e44b2d2382aee726599661f1b5899865dd884c7ef5b77dfd08ad86f2246e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR3T81400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968addf99dad3a4aaf212be391a0deb6164c63cae4abaa88f29a3516506064c9. 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/BR3T81400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631dc0bfefe9a147a4869f5c17b2f6441c91b37416760702e8de1f46e5d2add. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BR3T81400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61fbb406a1597f0f4e0f609bc6813f406068a68cdb4322b5665757b966bbdd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BR3T81400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb28c1449ea93130106f27134c9ee40809e4defd562af60e1fcdb3827560f4. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BR3T81400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579d83ed341ff4fe26632b5b1f60d74d07d57ffb9a8f32b7bfe240b62b18ce3. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BR3T81400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f58ed527dfddfa4e5740ba0e827e204dbc85e6e48ff3c908756d8fe7d290dd3. 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/BR3T81400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf62bb66e7b8bc25730b7e232c7a80a78e7ab731e7cd9f9cde770074c20dcd. 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/BR3T81400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf5deb9745fdcbaf955c91a7e74acacf390a3e1632dec524c5679d30155582b. 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/BR3T81400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3013418013c4c06ed9449bfc4870a34d0eb631efa4554b9ad9bd61f1532750f. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BR3T81400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0befd76e75d05d8fdb3c9b43c1f43dc9d5379ec88df818222ebb7e7161783fd4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BR3T81400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3f120c96ee3dd16ab8f427ff5726ef9eb4e375256483a6d6c24cc0d8eb8ed. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BR3T81400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc03649305a044f0e83cdc00da3d91ed6bd8d6a3ef651d7358c7d3e787358e6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BR3T81400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39813a23d1dc280595674fd91b7dbcc143461327fbeea5f37d5bcfed8911aaf9. 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/BR3T81600354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1517db41b80e11f64f7880643c14626c409c771890607ebea5617035095b0051. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BR3T81600358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb51e299466d5b6218713d53a9a9680aae9c5525416f89a0d936a3238bbbcfc. 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/BR3T81600362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9f965a8519f1900d7bb2c337b08ee547cc2526097f9e81e782a532635db233. 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/BR3T81600365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0bbce6d041803fc3feac2f5fc2cc9806773940642a8caff8a0a0fa228d653. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BR3T81600367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684b14ff2b15505626c6e6c5e580f2f37b593ca024d7d33a6d717e42ab481e9. 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/BR3T81600368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7d5e98465c18cb3ca2b6dada15ffe544cf706feb72cee509864e880c47a6a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX9ZT1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07efb44e169b17ae756fc337b4c2f819e532cfdc2fb91997266b6f529e37632. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX9ZT1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9776a3e7c15368d37a21f42425f05f2142c07b020447072b844105ebb579e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BX9ZT1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d6f2a15fcd24b04e1459717f44b0d38cd645c6c5dd387e646e1c6b73a0be6. 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/BX9ZT1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c839974019c178be4f5836c7796857836f50b10f30c945ce10ec7b1e528b39. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BX9ZT1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac374edc8858aa995a7be16e26032047407cdca9dc1b5dbb5b9de69a845baa0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BX9ZT1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9fdda007ed3e96dc2ae593dcc04300cbdb5e34bc251674813e79c054e64514. 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/BX9ZT1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2fa5aa17ee83130929e78b8cd7a01f9fd184611273d3dff9a8ce855b62782. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BX9ZT1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f186ee61160bbccd36ced4287325e21e60ea402181837bf3d71c3dd4335e4. 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/BR3T81600269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6902fd052bab8d308bd72bf2fe3316d8a5e90f07d8c5f1189791535996e38035. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXNT62204225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1daf5ea3966a7ec82250c92c07f35d59a4132be0144b8cdbd406af424494334. 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/BX3661800141.