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 0x36672a24c6c64fb76ddd80df2b2434975c86745dbf6b636f7c123a82f70d911b. 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/03750632-7ae9-4a22-af6f-ee360d3ee905.json and https://artists.proofprofile.net/proofs/artist/03750632-7ae9-4a22-af6f-ee360d3ee905.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 0xf969884335fccdf8b8a706c75ff0e0a12b4b8ac2d35027b6245517f71a7bb759. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR96X2092415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236b49b2d93df8181b19fbf4990b2ff58a62b66b351cf966fac5726cf789f85. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR96X2092416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991a62c876859436585cecfd28e8dd0c391d5b46ae3e62735433489e56a465d9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X2092419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c71808876c5de3a0cfa75ebe2d61c5f7604e747f9ee3ee18b8aa76c3bf7fed. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX762041979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127fee248aa9151f5dd3a57d30cd79baf67c8b4994bc0c2b05a98bfe3af90ee9. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/BEIL22200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c57fdde19cdf39d71209aa4389e57d254e4d5f8365b006b8480cd9493e9cb82. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHZ2475906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce526d989d0fcaa79edeaaa49292acda67a81c1cbed927c8e5f63efaa39aa5d7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BEIL22500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11026b12baba012f480f4ba5b0dcb6e63e86ab739f7d065881849c78b8d2193. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCAIG2456991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b590a75d8d7d00dd39d4a7563be75f55f7142ef60d660dced08327d5068e6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BEIL22500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd4630127e166c2e01290b0474ba64b50578eced5801cad2a1f7299d40fb18. 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/BEIL22500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d80dfe8849acfae3d5a0c4a70b817c94883f8c447849bfa6347753e9dae2c7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIP2484573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a611bdaf44187f682d89e0be07e19e06fa94332e463a35e3c4c32455b9e5b08. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIG2457316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b59c8201ef737f9b36f6f83118774d6389328f5fc8c792610815bca3f3675a7. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/BEIL22400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379cdbd5ceefcceae4a087e46578314793dc7c69e346068284729aa45a44201c. 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/BEIL22500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd2a13ca7417d3171e61dc1462c57e1f58fff472600fd4750a9cdf4ae93f342. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/BEIL22500107.
Lefto Early Bird Presents the Beauty is Inside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4458997c63664c31052b8c65cbea31d3aae0c14b637ae566a22537a8c536b1. 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/BEIL22100044.