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 0xddf25a79909ca240ffcb307b639f3ea6e30c5cb69af410eacb3d75970faabda1. 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/7e5ab928-a640-4dfe-844b-f810cb5ab7cf.json and https://artists.proofprofile.net/proofs/artist/7e5ab928-a640-4dfe-844b-f810cb5ab7cf.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 0x97affbfca29491ef552b6c3a1d570f3672624c1b0555ec2ee66229c645bbe38d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/UYM120500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37dab5b313cb9080f5714d64f23b17c45c0b2c0567cc6cb471aa5f07c968cf2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/UYM120500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e2e0f2b342c5c5c2e39f4c0aa96e6a65b8743a4a08b0ca573c49307c908f49. 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/UYM120500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc9a6ffb31ace30835a60364b8aaa8577807310f9a3b9111caa02a7f4e0f64c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:51Z), 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/UYM120500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3ae3bc0b0bd066ea2a3e93e11af0b3ac7043322a57e320372f3e44a15f2971. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UYM120500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969ce048875e1aced045acb179b17c663eaa2a9e4e5cf48b2f683f4847af1117. 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/UYM120500285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35e5a7fdf8eedf1a0a42441e0d868a30ef5d1a76e8b9383d41680917554519. 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/UYM120500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2a09d9434c53175aed74fb76487489fa55cd7518202976e22e5494043faba. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UYM120500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a3be7cf35a91d4556499ed448618e364975e7cd83fbaf3100f3ecc3219e98. 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/UYM120500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf141135de6360a3d1f8509df1df7c72c1dc4c8ce8322de74a838ffe7287588b9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:49Z), 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/UYM120601251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa639d94522ef916f1773512a0928aad3ec65f407f00a7a96557bbf01b4e3136c. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/UYM120601252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114f76076c9f54d3a321e3454df4873bc519b9bdf61a8f15e16f26b67014bc81. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/UYM120601254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b283225c6814424d4f3006e0964fef854814d61a92f8f5141384fcfa61830b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:38:56Z), 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/UYM120601255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a132a29677dbc4fa4db3260efd60773b2d8488c7b0359c2dfed5274e5976652. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:30:57Z), 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/UYM120601260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4736a68e75cf0c017acb86037bd53c6649c68cafae0341d8b5588925053d2. 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/UYM121200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283d99d052a425e2fd0b923b8109771c34029799a9cc2044e805dddd6c1a17b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UYM121200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87965889be7a71273e6e557d0e56c38ca24df78aac71f432ffd6878b66d85b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UYM121200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26776003d8495b56f890d99e487fc7196c7d1cf13058c67b31bed2ffbaa7e78. 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/UYM121200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf7957feca5b0a2400935d1e0b6f38f3eb3a275f2fb682251d69c69cf6f31a4. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/UYM121200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49deaaf287ed61441bf1a538a2bb10a9a123884f637c661864980ca6adcdba3c. 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/UYM121000538.