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 0x40aff3ac2f76528c333f68e448a27972acf888d3a3a582611e1e22d3f708630f. 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/ca6db428-9e43-4fcc-bdbf-a3052f8f520f.json and https://artists.proofprofile.net/proofs/artist/ca6db428-9e43-4fcc-bdbf-a3052f8f520f.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 0xa01093dbaa9937b23cd856816e28e3661e7f42017ef922fb52b03648b57b8a12. 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/UKYJ52000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0dee00a8870724a0a9db6a59305a5d5b486150ec26618789d634a281a5ce42. 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/UKYJ52000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f86df28379b542a6657365bee8a685108b937c5adf2c4eee2e4965e0a7d25f. 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/UKYJ52000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f465d662554332e23afe29fd9050421edbc7f7df5ecddeee58996d7029748. 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/UKYJ52000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a2e2461a899605f09c7def33b7d93203534a352e9a3c5d4e21b40880a3a22. 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/UKYJ52000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc838d2953ff3bbbf96422b9019cace9dc6fd41d760b8ce925cd27629e6b2338. 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/UKYJ52000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e77c3bc3110bd573f89858844be162b25a76e84228ffb6e970d64af7db0f35. 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/UKYJ52000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef1a75b5a4b4f9b500d8cd1a84291fa02757d3c4847334d8e1d02d684ac7ba. 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/UKYJ52000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1e554e6ebf8f81f0bc14c3cfd46004bb65fc328062c2da582cf3e42a8554e2. 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/UKXN22000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d4db881f689d49c538a7f93310efc45c883380853f4604646c7b95e87ee25. 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/GB2GX2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e1a25c8c69f56ce8b42d6fd6248fae2d96a72e1c4936e3617542b501ebc40c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM42K1906919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c27460697f64da786572fc9bf42e22a16a36a9348e7bd210660171bebb54a6d. 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/QZHN41934635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef782a8f951c43ee112de9e177cae5035c67975fe9d0aa8a6c118d026245085. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES91938129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8604e7f8633caea22fb8acc077e2fdce4e7c9f630e3191427cfc1a0e90268b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA2P1921980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184775252edb291119d23cecf47c820ebe10071345402719f8121056dc1297cf. 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/GB2GX1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f74106f2ac89668de4fa1aefb974b198eada0414ac50c7e6224a505dc15b708. 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/GBMA21899458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0643595ce43ef2dcf724096038e348595beced472cabc1a78c6a4dc5cea0ff3. 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/UKGDC1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5ff2ea24801fee734399065e727e7b4379492b0b0425a30c48b66ee17aa72. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZAHP1787829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d7d696442676d7f9536130d53932f43b9de93d09e2cabc90a37d5620d0be5. 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/UKYJ52000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656ee0c18c6dbe8b31be4f9ca64e2bba1aeef22eb1dd73e7b2c2d2efee8d58e1. 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/UKYJ52000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86f4a4dc7150e78b2d831a7e5f3c98026bd4bf3cda9403dda5b4b281b4f0770. 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/GBMA22052433.