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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd19c7fe6dfac8705285eb49fb315773cb92e17f26ad85564ae4d78eb2f901d. 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/92e92acc-fe5b-48dd-aa52-149a1bfce0bb.json and https://artists.proofprofile.net/proofs/artist/92e92acc-fe5b-48dd-aa52-149a1bfce0bb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01d36ba3d57ed9a353f8c2fb20aae657bb0969c004a344b9be1d58c479dc9a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYX2290103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916ffc323c08ac8c8ca1e53f7661ffa4981d415478a328236992cf72315673e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:41Z), 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/QZFYX2290107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6795a42144228507f444bceaf3d0ecdcde880b0b9384fd0472d14560afd0c5e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN42247338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4631c7ef2d334880004688b9851323546eb755639a68e9d3341404c1ebfa84f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWZ2299779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ca13243e1fb6d719d078656eb005aa1ffaab36570bda9ea15d48c104c23a3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWZ2299781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc77be75d3d32b8dcd08cb392ab2ab9efe17ada3b9cbbc01c5f9ca23371d61c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWZ2299782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02556584712943326122da018aadf666e2df8a54b0cce2b1ea652fb4ca742c93. 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/QZNWZ2299783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a8cd4e81120ce1e72a8b585fd21a579f913440bfbbc79dfb9e92e470942897. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:40:48Z), 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/QZNWZ2299785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778a03c46e834211ccfda5a7052bbcdc0ff9d1b277145d65979fa7a13cbda3e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNWZ2299788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e844394f5a24bf86fca6668975f7a3a751e4d951bce0bd2f5541e24c1c0f8b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDA82346599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5de98364ecd26672c0f95d1087d82502cd0068fdf8362953a2b91fec2437852. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:37:33Z), 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/QZES62489257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda159a799285553adba67b222b5b25e130b23b2303d4f319fe17e482cc6cd2d. 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/QZTB72472852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdab3d1c7bd5fe7ade3f01c060bb55e7d63a02f3d3f4ba8d849595104f871a5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFM2446175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f76a86e95ad03a6ac519f72cdab750d973ef9c2160cd3bcdf481a5ce69742a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ762497970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdab3d1c7bd5fe7ade3f01c060bb55e7d63a02f3d3f4ba8d849595104f871a5. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:03:46Z), 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/QZWFM2446175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115c44e97358a9928efc25f8e777f07272f2a233b05c368264117999d77dfa0. 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/QZZ762497972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f76a86e95ad03a6ac519f72cdab750d973ef9c2160cd3bcdf481a5ce69742a. 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/QZZ762497970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdab3d1c7bd5fe7ade3f01c060bb55e7d63a02f3d3f4ba8d849595104f871a5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZWFM2446175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda159a799285553adba67b222b5b25e130b23b2303d4f319fe17e482cc6cd2d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB72472852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115c44e97358a9928efc25f8e777f07272f2a233b05c368264117999d77dfa0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ762497972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be0150c451a06558899a81452f1695f5b4958c2b46911dc406ea9ccd1f186da. 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/QZHN42533666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca754e71f981f239a6d2ec3b040e97bb648e2b7a03c9b4091190327c14d8d0b7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N2563405.