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 0x5f7cac503572577f46909b0e22a8780fd651656344386ef3960694e517c7ee5a. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e59eb68-d69e-4973-9fbf-7cede382ba07.json and https://artists.proofprofile.net/proofs/artist/6e59eb68-d69e-4973-9fbf-7cede382ba07.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 0x806ef22600c3dbc34bab47426dd9fc379905fa47ccc640d0fbf1fb43288cd7d4. 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/ITS781901281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb24ee52f956e975a93028e225708ec46de8f42695d78cd40c777a99f93e3928. 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/ITS781901284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a804edfd5c6d908da6e05a50e7c79ce81379adf6db58f4bd2f4317fb71806. 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/ITS781901204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500fd228a172d9e846b83c673910623294e2e3dee664f20210540bd710710ee0. 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/ITS781901215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d0c671473a2e563d456d2364f3ecbf65170b300e0362c410ef2ad5f901139. 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/ITS781901219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf601c97f278ceb3878bc3f4a43a84f95b63ac5e926fa779d5e9adcd27cf35a7. 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/ITS781901222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111f2ca38729a0a14648bd5aba39c13de0484dac8cf3b95481067640d74e7253. 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/ITS781901225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91f01908100dde6625883aa8d56e9d8954f6e55e265123f2adde158a6ef7b17. 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/ITS782401275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf86645172cf3ec90c1c30b4deb2c75b32017126e073d97241076c796d78e5d. 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/ITS782401278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2599dffa3a6aeb151c319e74d1c52806c95b861d10a4fdb3fe0fd5db1c0d494e. 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/ITS782401281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c24518931ed2479a1a67e4af1995781347dc33f7253d35f6f07a450c6f72b53. 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/ITS782401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a0f34c9cfc64211b91ee6222cae0fa30e3db3bba58e1efb15f4f7af88e26a. 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/ITS782401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae91516d9127127ff955b0371dd59a009aeb18eaf38b5089dd425a381c0e58e3. 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/ITS782401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1345528480732cb6a1a6fdd27a83bf6eaa6775559c8a796036cac3a419a41e. 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/ITS782401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db9e6599c58946e1050b1eee00bc18586e7a0269f03c7ed54f660d898c980f6. 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/ITS782401279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe753b150044f99fb3fa0e4bc142449d40942eadcba50dc7c7f3ed7180444d4ed. 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/ITS781901201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ceff002239f378a77366c2927980bb85a7857f6b88bd6cda94bbca9b7fb340. 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/ITS781800898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63f65a386199f9f494fc5854271a8e36c633bcf4817985ee46bde7da81b458. 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/ITS781901401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222b25aa8e2062a2e2411ff1810bf46f5abd31a972817a819e6f54fb16089e3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS781702191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a33cd38089910e3d1e4f0d1088692a0a2d77913770f970ae7835812cb5627cf. 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/ITS781901286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb324cb3186695dce20dab27445342cdc98cb5a3ae7a7bf5a5fa00222a632c01c. 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/ITS781702340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6ebaa3c8cf461ff7a1a50adb2fdb25489ff35fc72cd54682f87da23ada472. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:03Z), 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/ITS781700985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb6733cdda6695cf5a3ac70d6a5939c0ea87c81b1c738e016021ecae8e95b4. 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/ITS781604588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3766a0d0a11533c8e14c89897dba3ebd6f8917019dd710186cc4abc61a488cd. 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/ITS781605890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b08f7c130cda804184d6db9d385e53e64e40124a73e23a99c2be51ed5b79d5f. 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/ITS781605882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3012c67e6286fcc388aea47120bac13ecd1997e2a04251ca53e5b48b5165491. 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/ITS782401506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd5134c9c8be8788740245242817145eb37f9465d5abba0a6d7f0b5e9ecce53. 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/ITS782401051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db38c98de5794d7e43a814f69a442de37207a898890519eebbcb1c690517fe. 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/ITS782400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592bc0d349e2e945d95afffd53972d8e2a40341b2fd240569e55dc3f385339f. 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/ITS782400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30f2dbab013e4f940ee58513835b3699f37b8c609c13da877f7eb92339bbd8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS782300790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d23865e118a3e8cc43d2f636744eef9a7c6f48b56c90a657b256dc327ce5581. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:23Z), 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/ITS782400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5050aec91521528173aa92730a826e4938da88668dce16768ecdc3da27fd0b. 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/ITS782300127.