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 0xf06a3865fdad031c5934e41574bb1dcbfe11868dc870ce409c512e6ee237975c. 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/face545d-f8d2-43a7-a626-eb9285143825.json and https://artists.proofprofile.net/proofs/artist/face545d-f8d2-43a7-a626-eb9285143825.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 0x141a5773e5e1acce052930490e6943ae941e52813119cb6fc7175751ea6d502d. 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/DEZN82460077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069c2fcd0ef23512d83afd198f61f6fcb130e749a4d0350283bf4b31482bf95f. 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/DEZN82466671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ce2e4c21d11fa06e6941a1c6d6ebeaf6cbd5c98b4564f196a88dbacd3b732. 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/DEZN82466696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39444a1aa68cfb8d2b0a1552f03af3a8aa6ea6d6ee7a7e69afe5fec236f377c. 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/DEZN82477734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02da6014009f14a96c02364f9d2b5957589b1ba1f20827f282ecc69e40aed0b. 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/DEZN82478238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ef3772b9ef80f812ee6a0631fa3b5c8d88b2328a9ff54df43b15ee58f8722. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZN82479036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547c15161d77abff7b2333f21c59f3aaea2834155ebd51bb01f4e341e0dcfa2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEZN82488465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6884f3a677dfca7ae01fa246380ccacb29940da7db250712ebdae45901b6045. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DEZN82494422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed1c90fd6daaadbfb6d0dce2e5d4692f81b50b9857d4360595e4c43f5bbc16c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEZN82509252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef7d6afb0af7b1ea40300e6a42c8f1482c2e91900846744af752a16deb3d56. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/DEZN82510874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea40490c7a021a6e27f530b71e1411bf2880801cf4cf28d47dd8b0dc678b150. 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/DEZN82517675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bab9e5bb0b9fe96727528d55abb24de4611d2c9bdf9de44881cdca8f9f09e2. 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/DEZN82517673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b099f4903b57f30c186ab71e6a0a2823859b6995c062234f088d519317309cf. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEZN82521669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77197a8cce0e6e9d8635bbfc7385c813c43bba1a99ab25d3c38aa81dcc102c48. 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/DEZN82526940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c29cde4878d099c16bb736ef4d6d7622fbaffca62690cb815fedb2511522dc. 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/DEZN82526947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b9312a1e9688ecf5f5119126ef4d69629edd53ea0084cd2c856b91efc533b0. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEZN82526948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7584b32ac98984f3cf2b4703c5b02e537299f75e007976c332adee61dc3c22. 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/DEZN82527894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f9f9d71289332e7eee3f2714e5ce9890d54282084258f1e65c2a508f8ed0d. 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/DEZN82529453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c1e0a78485b5055e8c06bc6aa9391794e01b20fc807a3a8f332b256f709a32. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82529456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e246cbe2a19e8ac7b77f5aca1e72af0bcbc47e36beb53592569d0b79437888. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZN82529457.