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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 0x85750a6f88221635c24a64046e2b73b0f8eed8760f83b168a538475e8c1b2e3d. 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/fc892da1-3638-4f27-832a-caf3c9e32abd.json and https://artists.proofprofile.net/proofs/artist/fc892da1-3638-4f27-832a-caf3c9e32abd.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 0x0794de2a83040c1074c81bc69636f51be3a02ebdf7b71aba259f55aae076b4bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL17C1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e4ebb7e2fb6f6d6b863d3393ae62fae167237dedc50c1b2e041dbbbfe4c46. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/PL17C1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f9381816d4da3d69073734d6cfef26e4d5051d7014438aa21e8006f456324. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PL17C2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5c246383f3fb06d15d89c5d384d3643aa49d1e16b42785fccef25521d5460. 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/PL17C2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8358edd8376312dfaad3f98c69e7a2e1e3f8f0bd2cb551d8ec62e5ea165f1f88. 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/PLH492049203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae455fb82ea8119dda56801cce76ca2b90e5acf3e87953e419bb2e1779f7035. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PL44J2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be6d4cd7f4f579f58737a470124ff1fa6cd143ca9c9b8f3a1ad0abb3053481e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PL44J2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb95878aa49fe2769e28db3604de705c551c9bef59a5f7bc0c0921defca5df4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PL17C2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f1be358d09bc0cfb9a90028347d4019a6fa6bf16341d11593975ef5c42130. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL17C2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce08026e94a75b606b180e759d329352baa993859149e94ac69bd637fa88aabd. 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/PL06V2293640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925dcacecfe2208aae1fcdd7787898304b3301e00a60a0f30ed5c70bcfdb2809. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/PL06V2293643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08860b5d1b4ea0e23a16ee1899c58e6cdd09f9000d570af80e89e566a9ca9f11. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PL06V2293644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b13b8d871820d59b2f2b0a34446ae2c6de2fea1370f953ca619355329e33c31. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PL06V2293647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba6bc3ea9e6c0f7c80893a0b9f2236722c6aaa858909dcc2021c7a1366a371. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PL06V2293648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13397295177472ddd53915712990d48a45eada52a7748a733174a4bf10564e16. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PL66V2200535.
DaNON ft Paulina Makki - Świąteczny czar