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 0x636bd0dbbd24710148755221a743bab008eecc8add4c6b0c20d7c2d209116f93. 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/e85ede98-bf27-4cc0-997f-b9b3f7f2f4ba.json and https://artists.proofprofile.net/proofs/artist/e85ede98-bf27-4cc0-997f-b9b3f7f2f4ba.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 0xf34f6919dc8f8bfa7f2330e4e077ec37da79a118d139e8d05847dc12931445dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ9ND2008200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c147d543cc606751b3b5ed0abca8c123aa8aa881bc0be27d1238308316b875. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ9ND2008222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9417f1fe27bd18b2577bf2fa9306644b7e55b945e1fc1bb24daafd298e64f6c8. 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/GBKPL1811834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e743536539e2d57e14b235360b96e3bc24806c77c7fd83ea9fae098f7a0da1. 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/TCADT1895364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feba09335b68f06de594c0dc7fd020a38c6ecf1109e5b3c86fc91dc12f698f9. 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/USKO11700769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a12fba7d514a9c1cbf82c2fdf6e7f60036dec4fa1fa6d6a5efbbc633b8e883. 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/TCACP1634718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c362667ba7144629aaa587c8efb727ad306605356a77549045377522201d08. 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/USKO11700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97205687659b8debcffa24823a294a7f5f9bcd8e410e8c75bf9ca0b13a499e0. 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/USKO11700770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b87e3ccfbfcaeb63d630a405075932f74f32ff56a84fbe2e4695b8f33b6ab2. 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/TCACW1764996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a0656923459eef341829ecb3e701b702a9320dfecc525009c89eeb5918cf7. 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/TCACR1696311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed5c6954e59d700e2f4c461835a14230d168f1291367b98ba53205cb0f6c907. 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/QZMEN2417856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a49d6354cbd359964e83832d9e5b6d5cf34354cfc1655cc247a2c9e8a4ef485. 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/QZ9ND2310060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c2822302cb897e8e019bcc5082f3fafe737331cfc10089a3f07b8222a92383. 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/QZ9ND2309290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6e2b73055686ea3504cb8676781db45371aee596c697bcf654881f076faf0. 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/QZ9ND2307281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c47580cb6bb63f7aaa5f6ed509a671753444b68861fa805defa66eaf51e8a7. 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/QZ9ND2307140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2022a2ebbbe9628f2cac546bc4f5e88cce4ff74342120898674267ea1333ff. 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/QZ9ND2306300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc5f0006e2e74cc594b9ad5fa389bba8c72e24c5128a60ae6d1e22c32929e16. 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/QZHN72339345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb21bdd164a914ed8fba1a568c880338376e221635e23d5152188ecb63d9e0b1. 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/QZ9ND2207290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765d77fb89960455fd45df9df647f6bde55412228b7ba2eeb8e841ad6a150b10. 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/QZNWQ2120299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec4d570360ed705a41ac5dd1bac7ebf605f013164ea686c2c3df67046317e31. 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/QZ9ND2106180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef75da1bef9890091c4ab4407c3343705f9ce50aaa52a72de9dfca3f92012e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ9ND2010120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50335d963d13a063c2d6b6ff236b2328a2762c79db85a4204ce0f8f1fe160b2. 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/TCAEP2031114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13b4ebe618ac6466e6aab320af0915f724fb341c50394ab13b5dd20f15218c6. 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/TCAEN1944421.