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 0xca7f9ee93625b37294f302fae013e1fd803d942505b576bb993afb8b4a781cc9. 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/cfbdefc2-484b-4afe-b146-1df157916111.json and https://artists.proofprofile.net/proofs/artist/cfbdefc2-484b-4afe-b146-1df157916111.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 0x71563474f86af053c07ffade6f4691a462ccf79a1e8bde251b4be96f1a3e5837. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452423099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378d51012fd506dcf2bd92c69355c11cfc064d94f608bab4c26389369522ec7e. 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/DGA0M2326314.
Far Away From Everything (Bastelbande Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f0f364fea5af1fb33d878bc94559f230cf34edd5c7f520eb7f896dde9193d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022384411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378d51012fd506dcf2bd92c69355c11cfc064d94f608bab4c26389369522ec7e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA0M2326314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010d217a1193207a00d4f330488f828e67c85c94f4b38733de78b05fa870d93. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022384400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873b405d3f54f82c216b464114c3c05436ee76cb5ef4c87fe22f0c87601f9e6. 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/QZDA71838269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010d217a1193207a00d4f330488f828e67c85c94f4b38733de78b05fa870d93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022384400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acea8509016259066e27560a33789790f90903e29d7491d2ba32b335a6d60cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022384401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff545a9ba7efe000592645783c179340cc9e2222c6449cc85a4010c0ea532a3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2041286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685536ee69c9c70a9c63f13dab2f528de326035059058de40852744fe764ba3a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:32:10Z), 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/DEQ022384403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecffa97cc2ab5bcdc159c0ce12e96beafaa8947d81c72d864a5d003d2ea060. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022010222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad0a842beed8d3b285deac23133da5a66f2570f4e0c8d1cf0ab87124336bad9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022384407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99226ba3aefed403b025050960eeb169fa29b428f686a5d5c8313986bd3e1cac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022384408.
Far Away From Everything - Bastelbande Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ae502a8e431646d3672d5e6e06cd687c831b81aa2eff8b049de3908fc0576c. 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/DEQ022384410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f0f364fea5af1fb33d878bc94559f230cf34edd5c7f520eb7f896dde9193d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022384411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79f380b27fdd9ba61b81e24f11468c96e062b74f2487cf8b572e6b50638ded. 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/DEQ022384412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4301299d06c332cd7c900e0eb6b61aec1af24cef4e9d9e89879b111a49fe4. 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/DEQ022276259.