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 0x017d90b98e65c218bda55cfd14d7a545069521fe8ea8e30012c65b020adb591a. 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/6a0297da-cdb8-4b39-b749-1ef3f5fb9cdf.json and https://artists.proofprofile.net/proofs/artist/6a0297da-cdb8-4b39-b749-1ef3f5fb9cdf.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 0xc5bafbf90a4e939a6d0404a3ccd760081118801cf617e1d279a9b4d8b658761f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b0bcd333cff2719c5e24e6daef5468e5ced73b498e6985b2cb02ef506319a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX5MX2263484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8bea4d67fb6eb09c00836c513783135ed8494def2f146cc99c7d4549a55cbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX8LD2249930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1950ce2cc7bdc8072a250876cfd41e7031fdcc86e74cf9e83e5915f618c5f8. 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/QZWV32438867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced8c9faf2d400b9bc8db0e08a923d78debc08c80a0712f955bcd250df21f727. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2467523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6852c6bcc2a9663f4f719e7ddd2ce250fecab3ba0cbe3b464c0e96773f3da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQOI2402260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473099f5ebe54e4ee815d124b62d9bf52649733eb31d657e5cf8974497bae054. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHU2479013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9054bf444cec6f625e2bdae7078dd53fb683f6b116895133db0a1ad1553e6983. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US38Y2312639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcbda1fb70662d925639831ea6a979c1614282e2ff112cf36c0b2f8e5e4482b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLT2H2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cee60456ac7bfbc591a6b50f5846c06a4abe0b18db4c5353bac3d091a06f1bd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GXBDS2390086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5e4d84a84958ce887c8b22f0e75a98581f381582530e4f893c7ae89880e1c0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX2375025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29299987123973aa1b49e00e0cba6b76ed8b7442ec1523ca1296f811729b5aa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQOI2300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069f5445d5f5656250cc805ece791d20609f8bb404768e7687b6357e87d26f2e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SE6QE2286854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef80470a3800136b5d2cc2ebba5b1c37fbe4b836707a668167e5be9e1447bd6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZHZ52242503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d96a146cd5c1b6f1c2e6426bd2fab0a8905a3cecaadbe30de2ba080bbccc14. 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/TCAFZ2272145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c52d91f9ee406d7f9202d0a86d23415b1e73f893286f07c6998314c36827c8f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/NLQ882100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e74b5c0ea85228b02b59c8ea72bf0f42baf60fa946b903f9ed1065c2465f65. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CAWHO2030379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa78e11ae1c7de51e8b698ac33c15d151879843274df12445dcb56fc01259694. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3HH2431836.
On Point Records Presents ADE Sampler 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd501866abde7c63fc727eaf91450d28e78ed47e7baf58096dc8e732377a69319. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMDA72316968.