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 0xdfc05a2e94afb971bd5c6ff954ada37f63c0b56e302f45b0aa720a1f49e2e1dc. 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/fc785ecb-4bd4-426d-8f14-4c2b2af5b8cf.json and https://artists.proofprofile.net/proofs/artist/fc785ecb-4bd4-426d-8f14-4c2b2af5b8cf.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 0xe1499f9f5aa23092df99fbc06fc95ec6774d236a09725c06629ff5a8b0a7fab0. 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/QMTND2000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec7e1b1e4022d559c0aa3477c1e2e29836a63da689a3a983810396f87d512ef. 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/USLZJ2071263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aaef62b758e9f8c61ae5457b545cf2a1bcc9e2a8bcbe77a68a0c280240d23a. 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/QZNWY2228246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6864a7e20eaf69156b3b34685a1285d75c89bf05d40fba4a4d211721ef24225. 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/QZNWY2228247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42dcdeff8d715d2d7c339ac53586bda9176eb34d8279424a0ef9c18bb70ae3d. 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/QZNWY2228252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cbdbd2e65360cbe24665e0150c02396aca9520e0ebaf6f8f11715fd0e5fb4a. 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/USLZJ2095535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8afebd527dd82c2ab05d228949eb132d330aee3386cad2669fc77ea727aa09. 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/USLZJ2095536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75cc0678474576e3c6d32645d03c632bba2ff382d16338d6841ecd15729818a. 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/QZFZ32071467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e4be489339ef545c1a84aeba93a7f6c4416d06c5789c7b585afa7a120b9cb4. 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/USLZJ2054398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93440132b8fbe7d6f114e79aeb1067e27f11da35716a9d1adc472fd9fa5abe97. 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/QZDA72045848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dafd937a8af855fdbb21084ca46ce46b3fe62271d9fe5360c0c33b736f09f8. 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/USLZJ2095857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec7e1b1e4022d559c0aa3477c1e2e29836a63da689a3a983810396f87d512ef. 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/USLZJ2071263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858683b5268be088c1725dae45fbae1c918303e669b1005c60db52bee729320. 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/USLZJ2095867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf03ee360aeb7f6dc1cee5f0f51e7bdc71be2f1589ae5a8d5f45313d87e4524c. 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/USLZJ2095877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993d8f92acb517453693313258e265d9098b81a619754a11a607afb3b8c6f93f. 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/USLZJ2095882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedbb533bc91bce34dc7ab8d3013690515eb0b12b74330cfad2fd0212101d2ad. 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/USLZJ2095883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652bb6a2b360a89b1586fd3a8838d4bbe8905faea05bc73c7b2152038147381c. 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/USLZJ2095884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4a6ad49b2c396b485eaeabc16c962eab7e3c3d309b788d39e29fee608cefa. 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/QZHN72486242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428b6f7c83c8ed81f7983048855e3ea248670d0fdfc37a793b2f56f9fcb939e4. 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/QZNWX2351778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1330846171a73d177f711c9891f41cee39a10687fb16cb8e1dd1c7d5f2319b. 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/QZK6H2143608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e4be489339ef545c1a84aeba93a7f6c4416d06c5789c7b585afa7a120b9cb4. 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/USLZJ2054398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93440132b8fbe7d6f114e79aeb1067e27f11da35716a9d1adc472fd9fa5abe97. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA72045848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75cc0678474576e3c6d32645d03c632bba2ff382d16338d6841ecd15729818a. 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/QZFZ32071467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d69624f824941b4da61a2cd7aac38189a2b3582bc210dd5ccff1238beebb397. 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/QMTND2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1cad5b38d93553798621d2b2c04cee5b8bbe8dea87b2831a134d1dee89e7f7. 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/QMTND1101588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba5416983c22fd2146512b5f0845c0e3645677db572f65d58c4419ad126c849. 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/QMTND1101606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e64b309a021a3c25bdf6199786db1a4ecc8bdcbf68b475f9b7a6a1e986073. 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/QMTND1101603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d69624f824941b4da61a2cd7aac38189a2b3582bc210dd5ccff1238beebb397. 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/QMTND2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1cad5b38d93553798621d2b2c04cee5b8bbe8dea87b2831a134d1dee89e7f7. 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/QMTND1101588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5504d596717fd23b822d8b5e99ecd3490007e6e9b669499c1a8aa770df2b6f9b. 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/QMTND2000163.