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 0x0792f85384b5fb191c91bd5627147e11c14405b428d97fc98b7b643111eb4bd3. 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/be3e246a-b0f8-4e7c-9eea-e2a1ba170bd3.json and https://artists.proofprofile.net/proofs/artist/be3e246a-b0f8-4e7c-9eea-e2a1ba170bd3.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 0x60d0c667c44e3748bdace9edea5d8664082325e0494720faedfc75681fba4f99. 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/INC171600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a4eb1f90808916389a63d2a599a45d15270b82c4b452b31cd59a1420eba6b7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INC171600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897fe0f3441c5b55cd15eaa146d25a9c4b249554e913b1740416803fe912f4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INC171600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857de778062c8ef1c878929c13805e596dfc09e6c2de94eff7095030c777aca1. 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/INC171600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60a7750043a50d3dace3708a5751736f6189b8f3dcb26aa33fed518d3c4491f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/INC171600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042cdc1dd72850321184d1e8b9dc2883ebddbae6ff85fd67cf81ffe74a0ac986. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/INC171600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2670d959db36d7717a53221d70425b6390a3bdea0693d0413a2910df625cb8b. 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/INC171400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb99b173d935ef07a9a9238b842c1a69c027165deb409caaad246bc0603d29e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INC171400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eb342081a650e3650f84351233410652e7642dfa86399cb05948d6512acefd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INC171400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad0d61a22ec1dbf5c32377a1137e0b53126163a5d729ea31c4498d097c8035. 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/INC171400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df1f1a4184662699da78590b6740ae1ac888f642ef536c4e747fff7f60d0a3b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/INC171400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e1e28626dcb6ec62dc3b8b752184771fd446d1fbba05d73eca538753095f0. 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/INC171400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b73b2fc0ef842e8283463b88f5b0ee8ef64384c299043f0dfec8b3691dac5a8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/INC171400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec10cccce85ddc31e5dc8fa009b95cbfc1a00eba69347efa5f445674bcdf6e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/INC171400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f06561953badf8c2f82e1c39d5d9e702d888a6f96a7c452743f0fbbc857afe. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/INC171400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0157513817658ba180f45e1ed108e1c0595b11be9e85d44218e24917a1dd18d7. 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/INC171400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1983089cd49e21a2446fa30e1211e334b6ada635560d3b207148cfd024d2616. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INC171400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af2e44e8ea4fcda9d7a5686ed6661d08a604244d6fd3c34ad840b38e2b6aab6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/INC171400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e55f0d2593f9cf820b4825b8fa64ea2b1452e64ded482ca89402857f1de787. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INC171400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9768208a72b976674375be288f6b4289067d951ab400455ce7e0e42e5c6b7a6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/INC171400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb36b29ef12eee68262c698301176ab34e78b40e426a8dd5c0f99d49f4c344b. 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/INC171300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb30d5e98850d88e548f1a74685539dd5efa4cc00329359c76397ba6ee1b5b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/INC171300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60015cd8f06b441086bc5e50994a830e27af03a1da5595854639827175715b65. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/INC171300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe373a84f518b5dd1a14972e353225daeef4c781b7d0dccb31a3bd4612f9fb61b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/INC171300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74a1c08259d6498e6ebf6ef4bca5352fe26aae66100678dcbb8f15510bb3187. 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/INC171300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e81183dd1e90888382c877ba06f08dabba1d14fd915ecc90d7089fc692054. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/INS7A2614001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d67abf222d4dc70904e034bb41a5ed005461cd88461be342a5d412eead9f3a1. 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/INS7A2613981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe474bc000fd88a7f56fe498d4a51142afc8dccbaf812a5064f58d694370b5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/INC172300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3a9fd748a6a23dbdf748a874b544ed580534083b45241db7d593f5aeeddf32. 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/INC172300070.