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 0x58c3466bbd8709f85879722121aa58bb28bd2747ba76f724afe972548b8b672a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7e8f5b6-c1bc-460a-9203-e8ae0bf8448a.json and https://artists.proofprofile.net/proofs/artist/c7e8f5b6-c1bc-460a-9203-e8ae0bf8448a.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 0xb3bd7c63ebf0ff11e665518938b6567520b372b3e1cd796b1d6568c337c2bc22. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM7281746811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0724ae652e61e7cbefdc9688e84835bcb8a74200ffc800d723e1616ad9e54d18. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM7281746812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f5f6f3e0dbd4651088918f3739c296fcc887bc7da3cd2e8dfaab6dd570085. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7281746814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c9b5f1f1b55417dadf104a6f6f695e1b4f656761a6adab170ef7c0395270e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7281746816.
Seeds On the Ground - The Natural Sounds of Airto
O Galho Da Roseira (The Branches Of The Rose Tree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13603548c9f7d7a4105f4022a8fe55383906fead6f0fb5603db975ea4fe007bb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USBR11700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bb02ea30e3dc84ac73c3a8e1b5533d0260c9ba8c5378dc3f427159aea8712. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USSM10005759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742678a62ef2c6b84cced16a750e5ad15c687291d48f253f0b48a05712f3bcb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSM17200954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bb02ea30e3dc84ac73c3a8e1b5533d0260c9ba8c5378dc3f427159aea8712. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USSM10005759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56eac0586bf54d4ce0438d0ef8ac3e21d3eeea890cc6ebc4cb9df1932be8877. 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/USSM17200957.
Fingers (CTI Records 40th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f02691ecedfe576d6c0698a62d73eb36dcc89b8ef9efeba7e4a87b7bcb462f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USSM11103315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f98ae41fddc960ccd46325d1e9069569944513c5cbc5efb010935cee133f6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USSM10114545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b429606fd7572d85daabd65fd72fc70f3c9238da2c5b0fd731e83a860bdb0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USSM11103318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8843ea39455d5738c89e76a76aa96ff7831351f1265fccd7f593f7c39d29f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSM10114548.
Soul Jazz Records presents Brazil USA - Brazilian Music in the USA in the 1970s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8843ea39455d5738c89e76a76aa96ff7831351f1265fccd7f593f7c39d29f5. 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/USSM10114548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971b897456e5cd6bbf0eae769cfaf84d48a480fe65db673d9161f270eeed6f8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USBR11700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2369f645b92e31186e773fac4bd6590eb9c291ab592b5f033197b2445f1cda0b. 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/USUG10701080.