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 0x6ef8fec81e3db018634a7ab614d26ea39660920f64bebc4ef93baeb0cff93d35. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/439d3bfe-a086-4983-8bb7-6253677dc93b.json and https://artists.proofprofile.net/proofs/artist/439d3bfe-a086-4983-8bb7-6253677dc93b.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 0x538ec25232543033ea666b572f00330de2752706b02441a14d9bb4c4bf732c6a. 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/GBKQU2343152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960820f78903b0e35ac7e53e9f837810ef760ea4e47b78b4960e7212ac837794. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBLV62136634.
Warning - Nick Havsen & Greg Katona Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2008d44ac1314accfa093e4fd326be5e0696e5ea439c429f6b69c4f40987221. 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/GBLV62136635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7d785a2175d339e3851a6cd10bf4c4e8abcb509ee16573c3fbfbfff9631d3. 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/DEUD42322097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe96d23815f668f566a3bc3ede3aa1bd24884b94a9608e6540f709d627a8930. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZP7F2128035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d66e2e692d06a212250a2758a801cc19aa5e911cd1cc4fe638e9323539d84. 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/QZP7F2105882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a67047feba0a6d7e5b4a50b22f7e75d315e5aeab2ac394d2fe368fba2d29077. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAWHO2037055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fbdfde3c0438ae90ad017ec23f9ca523155d415e85d0f1bcbdb05cc1a7f71d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAWHO2037056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae6d1d9acf20069bb24089760963fe5926e16c22db1c01f45c484327742c1d6. 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/DELP72000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4549dac1000c795e9dc14e7be55a9f557b57abc37e49bf18745dcf778ad71f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2454544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc013cdb21ff9166e40b8bf809e2f051c610c29cdf1f8cb188d35eed687763. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBLV62214049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4ce229a301bcf94c2b04b3f4a1b949d785a37c6adcba9fc09485bd01b23c44. 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/GBLV62214057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf684400b28fceefec47b570ed49d12f0e620fdfc8fe2bd21393e7b5a83b16ef2. 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/GBLV62214058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b224886d7645c0e890eac2b403b3eca4fcf7ad1874cf8b9091db544265cfd8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBLV62214059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a35f5c91dcd459a9cc138853f1fc0379f4cf6942a6aa5441bafb7649b7b403. 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/GBLV62214060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ece380179c252fe3f07d22efac97a80fab60e771829ece34b44264617a6b181. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEXN82379233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa411aba3cce74e2a6e75363891356510d3c02200d2939cba1bb1f9c9e55901. 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/DEWS52300032.
Nothing But... Big Room Selections, Vol. 14