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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6e87e6a2ed5d8fc596f3983d066d5044d0a918096241d9a1b49446d2f07ef3. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c42a122-7579-4974-833b-c6097c3b4411.json and https://artists.proofprofile.net/proofs/artist/9c42a122-7579-4974-833b-c6097c3b4411.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e49707bdf8e194addaf61455b1c67f35f3b75ea4f70ad9e0137ab446d6c34. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2478928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adaa04d6f5d7ba58984195a1f2e4ed18e9a9465a0ca52c991bc0cf6f1d9b7a3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2478929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619962bc5f59d0cabf735833ba49cda760472d481a6c0c1ac3424cf08fd7752a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US3DF2478930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e15edccad899435c28c2862e5d69b1fa1ee92ed7e3d3ebd23ac96e49860f1ef. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3DF2478931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3980890cf300ddf7dae283b555d16627437aa43a8bf2f288c5f1b760608eb320. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2478932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc986ee1e2bb7d387ec724ce93d54d94678d30becf8234acc3c050efdf502dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2478934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5594805612c65cb513548bcb150674470df48b5a27e804e6fd9c6df5c7b4ff54. 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/US3DF2478958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54c2a6c5b62267a7323ba0296ee22ee8a270b0a6c81abd5d7ac9910a85cc8f. 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/US3DF2478959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fe895a8642060604b30b49231b91fe44ef69efc04695422e66acc7426b10c0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2478960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fecd44d1ef91c68e2105427961e932fe3d6f63314efce1c2e254e00cfbbcb2f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF2478961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd70546dcc5c827b4ce428215fc3b22595f0a8d9042562e3fdc9bf54a68bcb2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2478962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec9fd9a984e4666e6a4f9867202091f40c10e29061f81d0547444028b05eb3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US3DF2478963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88348c727dc86ea811eb2f245edfb76429f6da14cc047c548e92bb362cfac5e2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USANG2463544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa138a6fbf257640de022a765df6eea21e3ab1626b4e195d37788bd8a62859017. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USANG2463545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf90c25ed74ea3ca0abdcda3d1cd28bc08a8841f2b6577c0f035d05d994a84. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:19Z), 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/USANG2463546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa673e0d3650b6b633f4fe206ab2cffe6375760805951300cacb72caf99742bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USANG2463547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b56d55318cca2ab55a525d1ce2084bd120bcab665311b65875a440c43abab49. 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/USANG2463548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13935bf4afb016ee969da784cd71507f93d5dc95b598159910612462e88bec3e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USANG2463549.