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 0x87fc261d7f9a3130f317402c91cb52b6371e701f5c2e28dec9c0f87f0b9609d7. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b11bb1e2-a397-4b64-9c4d-fee0f8b81a5c.json and https://artists.proofprofile.net/proofs/artist/b11bb1e2-a397-4b64-9c4d-fee0f8b81a5c.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 0x6576010b6a0fd8a5ed46276d0d131c679d148225604793e1d3c7a5546a6fbca0. 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/GBLV61819649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99eb4ec31d0f17cac476ac61915b0a09a9b4a16ad88740247fb6b7f7d83d993. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBKQU2057081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f1bc3f10cc8e48aae91fca96c1ae4447cbcf8b3e9e7a259a07884a953197f. 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/GBKQU2021410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0f7145f02195251d270b71ad0bd8b2db609e6f78c601c2f543e8d87c80ef03. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU1959930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e5c3cfc238b213b5baaedbb17f96ffbbf8a4a345f4cc29f93f6a5b9f66e3f6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZWFF2336002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f1219377c9e392be14255dfd7e23e3f0833f992001c91fe391808d569b64e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZMER2020199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3888dbcaaebf1146906e978f80038828a2c95f8dac71ba433124e8c6b9ced9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z1916904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec474098313b9e10f0c262ddddaf287327c421c50c07ecb335c4fdd44efec5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US83Z1916906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ab9c9a13b517788447257b287620035856e8d183ba555289898d3d0f9d7482. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/US83Z1916908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e74f9fdd191ea17998f6395871e9c7632023ad67a382850e616ddf5d7c0ca2. 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/US83Z1916909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbfcdabcec065be2e7e5c7b4e2bb7e9e8ea84c2fd612fa671336cc4064a6ca4. 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/US83Z1916911.
I Was Made For Loving You (The Distance and Igi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ce6a35eaca269f36852bb7def02a0ecd5479c34f0ad3af3207315d3a8ec5b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CALVP2029644.
I Was Made For Loving You (Anderw Dimas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0e9c91eec6781f43b067289d5608c32c6dae197be6c42da86022c21ff26de1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CALVP2030998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359481cfb375e953284966edb5945c62579e59803809ed4ef15576751b47eed. 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/US83Z1903641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6777d609fd6ff760b5ae3860d2f0fe157d3d069daff9d65f342a068c99b17f1. 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/GBKQU1788732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851687840387e508adfce0184fe544919951596d4605ba573d976199ade4eaa1. 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/GBKQU1788733.