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 0x35fe920cc9c180d7fc7f4232bccea00971b65be4d9d007546aee9ad4095e924f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44df4036-ebd3-4dbe-a5db-3765024354fd.json and https://artists.proofprofile.net/proofs/artist/44df4036-ebd3-4dbe-a5db-3765024354fd.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 0x4946627bb1e29e3fb7b97348caae05f3323efea9eac84758334c17fb6380b3a2. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCABO1357094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c696ddf0cbe4665119263c9855cd5cbad7be816e1bde3f1036cd603bed9d81b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:11Z), 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/TCABX1412271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f0a11044ede575fe6ddfe361b9c9715af3f27a87cc817ae4a5fbb53bef914. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCABX1412273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86522f37c9cc7dd0de4307b5e64cc7d0a22d50dc7c482d411401579c605651c3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCADP1838350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a562dfa1088b8db6b8b03d37c0e29aad9a899a91ec0314953252b79e2bd4887. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:48Z), 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/SE5VF1906845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0c4914e08c1498027d33c37cc59dd07f3e6fa8b75e75794ab4763c923cefd1. 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/TCAEI1965300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca4e774e3be0800e09bd44b3b97e3e2703dcf36c8f688ce30f21b0441f66e7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:47Z), 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/TCAEU2079760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc03ccdd04932ff87ed026571cbaf42d702167db675964450a7517bc3127076. 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/TCAFG2079791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0893eda8cdb948df078973c44e8c2a3bd885ac56e89d5bf22fc965d7df6091. 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/TCAFE2095679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447fb59eccb08417da3d73eff5d9a58f8eb36ac2a9e97f57239d1a9b7962d6c4. 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/TCAFG2079803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1758f5c7b73e95e3d01592d54acf20ff1fe7603585647f5096eb004b053c5da4. 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/TCAFG2079835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1d2ecd4813e9fa4739d9b0f0af814908e35b60fec99352a22403d30f3f1e8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAFG2079839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aeb8a568979b2410d900197c6ef51cf03e49f24f6ae359e89e17632511bb78. 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/TCAFG2079843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc802fce7cbda962a4771d33915cc7f31a43690af02b6a63046d3f6946b3450fa. 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/TCAGS2390822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dad3f4ae930b3bbdeaaa821c9190b98d59fb44d1e5cc9cead93d33b4affdbb3. 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/TCAGW2339284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866828cced67407094b3572386ae5053e971bb6c9ae5820a315180e001e2b40f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:24Z), 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/TCAGX2310910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0e9b81584afe90d371dd9edc7e4e7db5be155e7bae10d9b3a36786d042e149. 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/TCAGX2310925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dad3f4ae930b3bbdeaaa821c9190b98d59fb44d1e5cc9cead93d33b4affdbb3. 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/TCAGW2339284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8839fa3a587a76482a0f4bbd6fb05537908a6be074a296f0bc675db2976d4770. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/TCAGT2338930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfdcc0302056040ab97f7e01574f1fcbdbcbee97b053bdeaf819bdab489e29d. 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/TCAHX2460218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3454c87527d2e08bee8b4c70f1893582d80e3d4537b4dead379181c4ad8a47. 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/TCAIO2432518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9e13b38bcc819d35fef1529f9a5036e40fc28068967062d54f627652508917. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJAV2410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd814ce0e4c8d32025686d79c26d8fdeb73f1afe0e4ec8e2b1ad1cdd146220fb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJAV2410009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d69fcca17496ca34dcca539db14c1842cb7c765d75315b6d4598ef33e13c73c. 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/USJAV2110004.
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