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 0x933ca4338daf6112afad8c09779b2bbe5f58c6639529d537a708621b150caef3. 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/eacf812d-52b5-43cb-9658-0ffa7415dddf.json and https://artists.proofprofile.net/proofs/artist/eacf812d-52b5-43cb-9658-0ffa7415dddf.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 0xaf11c6cd580515c3ef37eb45ae8fb93cea8535fca2f3f19d2812256aba4f22e8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX872111730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b98894a17eeff192a2d5bb6eb0fd0c709e11d67b8cae0fee959cdb7d885cbd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRX872188223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe91551755c39e7dd7225a3afb1e68331b2fe368dfd4730eff5338867277b25. 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/FRS182118414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b4250353ec3a5ed92baa30b3efcdf51bb0eb048768d33f49981c8229d33341. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FRS182135310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33d2a8917769fc01609abb06407d8a5feb3909c409bd28aa80fa5aec76e6cd9. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/IDA632206051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ab4d5bd4c7d7d8d9956caf13864e7983af4a19878e8158c3279bbbcaa5a75. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/IDA832113829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496ce6f1e34fef3ec7ff2e128d38b6bb5b2ddeae753c7a8f0403422eb9763ef4. 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/IDA832302295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e46fa2929303af3e73157404ba15ff78c35566826363e76007a959793e9c27. 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/IDA832302562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e59ea9814d34a3478d8daf6f56b88fb8e1c9c464135b9263440f0262c0f70a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/IDA832302777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2209d9433637d99bd9b0814c980f53fd15b558432acf705919db762c13c6c0a5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/IDA832302893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28de62e6f781eafdaccc76395408ecece5c77a2793e4ac1dd49285b909d41b8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/IDAC52400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c14b7aeead9e8ca92e56d3ff9799bb2fa0b9f71a450bff407d12c904b838b0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/IDAC52400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a6b3577673775808c78640cd99b9532e02045819f736cb54ae9d91638a82a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA062474111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b5ac671c37d17e8e4391aeb764b73922b641fde34f90edc06e98dbed8eda2d. 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/IDA832501427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfcc52c0256defd01fc8e614980eef46c7a5cad9273202d6ad3f5ff5614bfcc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA832502025.