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 0x879fdac98d9a5cfe653f03e2b3b21122f79a70944e70afefbd82bf68f734d25a. 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/045eb73d-b4cb-4913-b53e-8247d44c8418.json and https://artists.proofprofile.net/proofs/artist/045eb73d-b4cb-4913-b53e-8247d44c8418.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 0x0f9001b3ed830537a5102392d1ded835c39ce4745a7d56b1be6e4cdd881c3556. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2312616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231a1814f78a85e5515f9ee3278d09530bbaad69c02c2666627c4f3b7b1c202. 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/TCAIJ2431214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf087e527c5031d03f79a7497842a4b821223b19946b7feb4ae42a81e0939bf6d. 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/TCAIO2408849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956200b2e0687ab1f5715a17c425bec130affe4cb518971dba3644222db87e9a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIP2492670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2951b6ff7674f091d307dedf76fb306e8fa3fba512d9d221ceb8309d7e5757ca. 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/QZVEM1821923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d47c01e435aeffd222f0351825be78c839b3348bf0c3636bb7316471f7d028. 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/QZVEM1899702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1e28afb1cc52696774cb67038b8667af0bf6d65151f8e3b1c0f22a5437a86. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM1899701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a37818c55096114a03e8fdb388a65106374e2bdb751a583b30df5fdf4edb4e. 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/QZPEW2550048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42b8aa273caab4427886d7ed799a3e0ac06795cbe34b726ed8579e328eee33. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZPEW2550049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545fb1cb11f7c0dc64f3e5faa730a5af9bc7e489adea458f9f84b45722b3e164. 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/QZPEW2550051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45eb98bc5ffddf60367128f9d7d9e0a800814bd0e6e41ecf6cdd6af8d54da5. 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/QZPEW2550055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b77476652ec85b272ae7b1c4e0aa2c35dbb3a1f73d04bdb9ea94b2c275be55. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:01:00Z), 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/QZVEM1899703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3bd74b5c6aeffbd19b0bbfcf26887f8a8027ad9120c9cbbb57ed4c5030ece. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZPEW2550057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a37818c55096114a03e8fdb388a65106374e2bdb751a583b30df5fdf4edb4e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZPEW2550048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545fb1cb11f7c0dc64f3e5faa730a5af9bc7e489adea458f9f84b45722b3e164. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPEW2550051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431c7d4dd6c9156c834dabc79b7c6daef001610a0ef2145a8a6da284ad09b651. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:48:57Z), 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/QZPEW2550052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b137a5d618b8c714776b319cf9ecbeb74924056789ade904abc57fcc93ab5ef. 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/QZPEW2577422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a9588eb245b2be2762e5152af001d5a6594ea9aaf4f8702f9f9a745b9466a. 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/QZVEM2549271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598e413be165951cefad7a5222872850abce6e9e4dcf49cf7ebfa6249610d874. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZVEM2549272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2048637b7356e43acfc898c1a98e2875d49a36e4501fba6585ed297d458d73ca. 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/CA5KR2450849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f0e57cb55ab5654b999d9be5130e419964e937fca739524159969cb24a27c8. 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/QM6MZ2422225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe040013d9a17c0e47f16a3873a06f94b597cc45cdd12441ab20c62bf9aa3bba8. 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/QZNWU2419416.