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 0xb8677117fe45780f328eb18981ee8761f2451b22820702afe8f38e89172607ec. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd5878d2-2caf-4236-8da5-d6da345c0af4.json and https://artists.proofprofile.net/proofs/artist/bd5878d2-2caf-4236-8da5-d6da345c0af4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nadine (Morena Girl) [feat. Sam Mangubat]
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 0xc3b3da129859af4fada52526c0a9ef2e6630857815c1988dc2bcacb5af8d7201. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/QZFYZ2059163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80def3d22274f67dfe23273bc5432abea96770f62e4e1bcf2e7d35097a6fad4e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRX872008984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbab6c870568756c3f98302dab110dee7fdacc8f3f10dbdee2a2d5e8e236690. 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/FR96X2185831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8affe793dbf10e8163c4bbe55562306dae259ce3e58ac834a52c583686b564b4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX202199879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a35f6f7a32374846ee009369370bd20b3fe7f4f7b8055799a9e8fa1863bbd0. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBA2238730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0634ffdd7dd98d3707c052b0602ec9b69719ff31deb546265050aab4d25d1. 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/QZNWZ2475677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0eb0ca83993ec53bea30e16b5fe2f396c8419e11031d29c2d25da011e6e688. 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/FR10S2567296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8e9820431d1637cb3176843194bc2c2b9b86a0584eb13b2efe042c0786bc7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR96X2596632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8e9820431d1637cb3176843194bc2c2b9b86a0584eb13b2efe042c0786bc7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR96X2596632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020efcd7c37a6383cc3e66d0e41ff2a17f37ab001139902185dd2a5f3d0b84e7. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB92562115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3945140279bc836f91e501f842fd05e4603d8ba9f126958daf4a9b2d614b2a. 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/QZTB32511949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eacdcbae15519f30c45bf3c6611cf205ec81702188c4d2a6ba19418ccd1ce2b. 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/QZZ7Q2586758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841b965dda9d67eb5bd50c271634c082f30145ca8c944e4241b5938be37ece39. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FH2539144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3425ba006c9c4519c3486e01dc7a735055c3284e0fb80bda8fec2322b33ac50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM21763121.