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 0xd2cdcd950f2252e192da36b3adffb30b013417e71ffa67fa6e9b593bf94bf476. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/798e0440-a0ad-4a12-ad94-5931fe50a918.json and https://artists.proofprofile.net/proofs/artist/798e0440-a0ad-4a12-ad94-5931fe50a918.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 0x25e36d8fe9dcfa47ac6dcc3896e40b974384f72e15840517e94ab6742608f094. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USLZJ1535708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aa1c435b60dcfef4fcf1be2ab6af1d8d8a055b4ace939fc9e63007dda49ced. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2463890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a33d1669b3b6694bb4f7615f6d675aaf95b50e7167d0a30c95272470e697d3. 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/GBKQU2452376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff044d6951860058a7ae7638299739412eb9ec49ebde3704e53f2a99f86273. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBKQU2430534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0f317fcad41bdc3683c4c98f0590f4f24d66ed963be951a6db1d09bb6280d4. 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/GBWUL1907392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48713f6138e2128b9ce1da54f1f02d8c5c70b0d1024451fd11ed3abfc84102. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBWUL1907393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaef956a6153dde7600dc561c789070095978e89e7dda947896c3d7e77a4d349. 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/GBLV61811022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ece4aad74452dfa9ba2fbf65a573585b1bfcb9bdf67e7137b9044feb0aebc2. 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/GBKQU1569539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f0a64e73387623aa0708c06a8d550577bc2c3f2e0f98939b675179ccb2a29d. 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/USLZJ1720808.
Wandering Strangers - Fisso & Spark Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca30f0b0960f8e7129de5b147965841c676d3280c549f0f468faa4a9a6a6f9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US8DZ1300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ffc41c5e44f12ca104f5d5057697459980d12be6702d25716229245df70e8. 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/US8DZ1300354.
Quadrat Beat - BlackJack / Hollywood [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134cca2879f7df1f1daf4e30f66261cab6c6d4278bb9d1fe4feabac680b8be84. 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/USLZJ1256761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d177f84ec6f4f742feaab70e1359f6e8eb6d12a4e6c9873b4c91ae4bf8d78f. 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/USLZJ1615457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1078d264cd6220adcb9e6e05c27ac12e5c8c013036f1159d3338522e183960. 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/US8DZ1100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19145b9efd4f0b43f5a3c7969b2c3c569ca6b75bf7901cb0c4ae69d4540a4a2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US8DZ1100337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21befde007463cadaccbbb32619d834a8ef44124264fa53698efb7995517761e. 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/USLZJ1142264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b6397845d9bf69c3cde62c56a0e9513c9e7778cb2da95f65ce107590642eef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US8DZ1201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777711a6e12057f8be57624cadcb844690f50fb1ecc2984c5358bd189534bfd6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USLZJ1142043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e8d239b83272415e156ba628bda818d233c0058d7d5b8d269cda2f08c9fd9d. 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/US8DZ1301039.