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 0x250af63e3ae009e343e0b8e3eddc2f8541315feac3bbc293b54da481e51928be. 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/2c9ca096-038f-4227-9ea1-07cf865059f1.json and https://artists.proofprofile.net/proofs/artist/2c9ca096-038f-4227-9ea1-07cf865059f1.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 0x435c5029a2e85550617b20ef909496814f9eec28f16a6e526763ad800825147a. 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/DED191100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d34e5d9bf0c293d691a2bbd79880021038ef9fd2239a3cfd5f7c85ff9cfb84. 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/DED191100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f902fe0a977798f8b9c811c53157721ed2ac5ca1b16b9e4c128def35667d1. 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/DED190900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e7be0aad636bd0f5e3bb1beb37d944ac9c7157bcfdc7198776fcd029948e34. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEUM71403801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4a86d27de1c82a88cf35a7e703a0d8820351ac156a8c14493e93667398637. 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/DEUM71303786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f518a1ba792d5bb91cbae200a42cce7faa9b8900f7ee043e00834d50621567. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEUM71724492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e08d7c5be4cfe7e5278b94d8164c40ff5f05d542b0f1b37f013ccbb55d90fd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEUM71725619.
Bella Ciao (Fosco's El Doctore Dance Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab82d2aa01292fd297a246507d16649992efe8fe065460463697a99d5aaed78. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEEQ81900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb27a64646460d0e9a1f5828bf9a44386e057cd830f27369f7871b7884df26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEEQ82400134.
Karnevals Party 2020 powered by Xtreme Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab82d2aa01292fd297a246507d16649992efe8fe065460463697a99d5aaed78. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEEQ81900001.
Après Ski Closing 2020 Powered by Xtreme Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07124730b7065a82444577fc5c8bf35dc0bf96606426cbacd67229a5b4720cf5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEEQ82000015.
Best of Karneval 2024 Powered by Xtreme Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9516e677836918c1659ee4c8243fd62790ffb216322d34afafca7a191562e905. 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/DEEQ82300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48dbc33d3c84bab1b6cea621a649733b5963625a5731c72dbfd0c9b9c29bab. 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/DEEQ82200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41e041f3816fa6cef49d9cd0a5d5a28b7bedd95628c935cb4cb571c9a9d4289. 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/DEEQ81800138.
Gretas Hits - Die grössten Boxer(n) Kracher Powered by Xtreme Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab82d2aa01292fd297a246507d16649992efe8fe065460463697a99d5aaed78. 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/DEEQ81900001.