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 0xe1f79260929acb9d4b1da8b5ad3ab9308887b46987c613fdc1cc309ddc5a3607. 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/6aceb9f6-add2-4d90-9d38-24ec8cd842ee.json and https://artists.proofprofile.net/proofs/artist/6aceb9f6-add2-4d90-9d38-24ec8cd842ee.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 0xeef1a1cbe500c45550db7a817290d89de48eb900c439c52320be2826e9e7f7fc. 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/FR5FL1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b6f16334fd4e172df3f4c4a8e91459308b4ee8a7953d49f2dc3fa5a1695182. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR5FL1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ff016ea89f7df284905b5910789c5874d7cb6a95ad1d9829e7054ccc2c2658. 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/FR5FL1300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397bf9051db480446084699d67d2c888f8a7c66fa85ab85f9076d4bc8d0f8b4d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR5FL1300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b10cd176b29123cb9d6b40a36d9b0e5d8723f44401569c30892954e98f145b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR5FL1300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e43d968c5543fad3011d319821e28ccd3094c522ea48c1f4dd84062e9fef45. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR5FL1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8767219aeeaf7de68465fc249060a1099dd5638409c4e82eca04e8eb782f77e2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR5FL1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77db6570de3dbd4b9b7acb7a2e02fd5c4b1e2c693ed3bba4e893e742faf2289e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX281718297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce72b09c6acae34a7d9c638da23b188646511fefd081bf9c3cebff5ea34593. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X41849615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b0c5f2596b7683f418ce2d25bab39e0787f8f8493164c1f6b118d4722db4bc. 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/QZMHK2253378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751052904c4e851734b8e4f3dc8d88fa015468a5ca7a34f005f42451334ab01. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FR96X1891477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e20ba1854836c058a576f694f8a2de683f85c483c87bbc8fd8c168c252dd7aa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S1981813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d03f085d5a44a124c274f9021cbaf41f9baf1f759510a6d979ed0bf0bf3693. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FRPI81903780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab1b6a62f68c75b4687dfb1400d9688dcf335f7567f2e3061237475a2bcef61. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FRPI81904340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b90a1d79590484ab2ce7fbf139d92377ed9320f37c0cc96a87892bffb0530. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FRPI81904180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288c126e3746b211eb7dd966bdd44f174a01a45851e2eb521535f96b3e54577. 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/FRPI81904460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe486b6793d6df7ee7c4d62b8016cac4baea903c9533cb817e27e71bc7ebeb5b8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FRPI81904480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d4940be1c3b852646aefec2555a401a31c7ace2060d1c69717d8373075fbd. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FRPI81904490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cbad195719e09266f8367bf131caac04d8acc34a640128c51b714b533a7cf4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRPI81904510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b00fde714a5065628387308f442c589a7741199ae0a7ea6f714c0716dfab73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRPI81904530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6a913b129309b43fbb40dbf7c28e22d848449f303e8963780353198a9205c8. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FRPI81904540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f4fa651f4a1136e9f1525e1b518786d8672d8bc59ea32be743cdf7b4cc88c0. 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/FR9W12214726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd816e4277d0450e656be873c6bd21be901875103780e29e41ac9c62c2bc7a9. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FR9W12214727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3819b01f5c720040c98ef3f3a6ebdc20bb6878f4d8b99e7c2a184681e9472159. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/FR9W12219045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f4fa651f4a1136e9f1525e1b518786d8672d8bc59ea32be743cdf7b4cc88c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12214726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768c431d81ec4b193fc8758f53a300b07501052ec18db1a867e09b73fcfad116. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12224216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070465db501c627259d532c0eee615312d6080049434d0b32b32c84fef39cc70. 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/FR9W12224217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb339524c180133d7cc22b4e78371b1a722b5554bbf403cad8fae292f1b8f00f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAT2395353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf051aa08961bcb8e66477e5237d70afc9ce941c7175c173ad851df74c3f601ce. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTAW2337713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f5e1f52c450280393a76cefc50751adc15c39fe7f3c4fdd102e9276f12fd54. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTAW2337720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcc6f6f8ab3205dedf9d78939c62ba547883e5dc5f59c4ed7faaf06091348ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAW2337724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a933645973c9112ce736126b1367c07fd934b34cd5a031b2613449fb3d42ad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAW2337726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cac2b396bea0da382778a5e689f0c99e0ba7afe657da57e887cb00cb66e2ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAW2337727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37da8adef4fd511fda5946ea0715ef012d5bcfbdfbe9b5bf0dc23bc5848d115. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAW2337728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f7d3b53beca36738cf97c9e192f2eb2d91b741a868f7212cf3f1a459642a7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTAW2337729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2908a35b7e9ffb7431ee25f36760f2ed5b5857da3b670ea83c01d6200ea96. 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/FR8FB2413600.