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 0xf8b432b8c5ddb62387b35e00d37199e27e2dfd8c84eeedc380f7f0f3dba26878. 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/082460b1-951b-4ca2-9ef7-6014d568d4bd.json and https://artists.proofprofile.net/proofs/artist/082460b1-951b-4ca2-9ef7-6014d568d4bd.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 0xadf35b5a82fcc0deb2fce683fbc9bae0080bc65067734987e4a833fff6b5745c. 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/FR9W12021947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e43d7af9bfed110e7e2fe4e187582a82f2deb135e00733c994e47f3d597b9c. 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/FR9W12021948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fdf41f4d8249f9628896332974c62fe835b49b8bc34094a0494949897f3b21. 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/FR9W12021949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e25c77e78fdff52aa76a4ef06cc27d23c98f6f543e9ad2b47fb891d0f69e8e. 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/FR9W12021950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96304c4f46fade04ced1a37e2cd6fb0fafdcbc90118da6f11b4b16f69ac543fb. 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/FR9W12021951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70be9e41edcddfe655614a2ffa3f4a2d4811ea7358808d1ecbb80261d49a8971. 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/FR9W12021952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d81486eb250a553134a3536a7c0095a8fb9185714f7e7cfb8919d9d313699f. 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/FR9W12021953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0760728e3f171cafcd2bc43328aa2715814ccf455ec4f6985917c930b519761b. 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/GBLV62122268.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0005d46881ae6f4165db4ce72d350e18d2be9f0f6aefa587d935665e1694b3b. 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/FRDX62202570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e51ceae737dde1d23ec90342273f8a566c12cbdb2560a3c9e275bcfffa300. 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/FRDX62202590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e37426a9a985fd3bc9c1a271b1a3f585ff970211056bb48dda518f5ab8a8a1. 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/FRDX62202610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb18a5b4b537573989a8bfcc1554debad9632436c5151d97d222a0279a67d3d. 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/FRDX62202630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12ed71478ab7b6a2ae8b386ed6c436ca316b30f4bb8330abe784115aa40340. 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/FRDX62202650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5886d687f0ebcfe340cf4ca0d65d6801a848ec80c85333e6302abda9e8802146. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEF272434602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d18ef7590cd54f56145103751e0209318b9872c94dbf23d3c88a6f71ae5c44. 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/DEYS32401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc723ff6275d4837da54839ba425f037c749cb8f2124b7bc688b8cbc7493085. 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/DEYS32401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353431beafd1d4ef33310fad781eddbaa2174bd9e2cca2c6a08cf70cc7ea578. 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/DEYS32401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f00eaaf55a99416871e46563afc14ed91c5473f8082219de22250155944d136. 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/DEYS32401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1ef364d13b5083c4a5d01f5e1ab00f300346ac58009db5f9f4f35c615e1030. 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/NLCK42419399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f30969f650501903998bc6bbba691d09099d65740f6d1b8856e2624ade418. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:32Z), 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/NLCK42419400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3159c63204aec1c2aeb9d3b0796570479a7fbb93c61f014a639c28e692bb369d. 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/NLCK42419401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaddbc7d52b39ad624d33d9f4fbe7e9ada6e89fbe640423ff24a9fd85ae1c887. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLCK42419402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8037b39f096042b928d1fbe90d33f2b09bcc393fc0e1950d9136642b9575ea5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:44Z), 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/NLCK42419406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851aac1423c52832b2cab3b145b50001fa6633a5b19156ae3df227c165385aea. 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/GBEXH2401927.