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 0xd3531da15544f1bb634c9eb272ffc87eed644f6a64403821e4d6eb876f5f47b0. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cc15a25-c76e-42c3-8831-b7f4ea4f9f47.json and https://artists.proofprofile.net/proofs/artist/1cc15a25-c76e-42c3-8831-b7f4ea4f9f47.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 0x11b142c0895119afd6c17fe15176c1a9d13b56f53799c891b0deeb6c1cd11205. 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/USVPR0511257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57771c0f6fa3aab16f672214f2e45ba83f3c6f5015714883921ac977065db448. 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/USVPR0511258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15e612e0968efa317f4ad344b417a7d401ebf53756bf7b6d74b3ec55a2969b. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USVPR0511259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1638de9bb6fd02ccee2e8c2d2981f112a217ca009fc95ff72102f6914b3af355. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USVPR0511260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9750198caee1949a8570ba07cfe9352a6168e0d7500109bb6a872a727eec2. 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/USVPR0511261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ab5499aefdfe21d273906cdac6c45e169faa146227863c735b953a788169e5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USVPR0511262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b045c76c2100b5d2df0d6434eaf337a79ed47530035434d74922961f8b0ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVPR0511263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8753f6789e47b705e90a527495f2cdbe86001cc8532c80861d8f300cf9ffaf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USVPR0511264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d3cb538f69efe9fbf53fff37575baa66a513bfc6da86d343a52a7b85507b9b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USVPR0511266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f057045102ddacee1d81fac0dac19efea83909b18aa63cc08b762a5e9685447. 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/USVPR0511267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3081245e1454ff5cf79b13e9a06ad24b34a2562e3b158e1677896141b602f71. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USVPR0511268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3219c6653d7175cc1d1d28cd1f527571f8f354df0ccaa6f3f6404ee249ba77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USVPR0511269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264f0e7deb8258df1a9ba640a9d5cf6ae7dc48baf7ff08fcaa828a125c41b6e2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USVPR0511271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab3136a1235ee638609dc3c026b0d30f58f08a8ddbe99e2bdf0d450d49385b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USVPR0511272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284a5df28509b159722d2afaa61a4eeae3b42a6756e61f2166946c0255e8e578. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCJE0512785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c3562f54ee217c954dfe75b47fe06206c55b4338d08327669dfc30dbe9445. 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/USCJE0512797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597041fdcbbe19c1ade401d10678234f5d2fed6a90ece762c01a9d89caebaeb8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBDKT0600876.