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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b7b0a379d1e7363aaefccd920a3e2ddd226f4de15f27a4a04b153b2a5947d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eabd41a7-bc89-473e-8555-898f08ad06ec.json and https://artists.proofprofile.net/proofs/artist/eabd41a7-bc89-473e-8555-898f08ad06ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Argentine - Argentina : Chamamé, Musica De Corrientes
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d871aca1c3f5fdec281b387d6d892cef46ae10c5b7c7a5f8126efcfa97afb1f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR6V80523353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99438488823e96042b63e5833d795f51c6f12238b15657f2aed5c9722d57a09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARF391401452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ea4fe1177d50d04bc0b7501389876bb9654523eca70fa5c73809f50ea8d666. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ARF391401465.
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 0xfe2ee7bd0de57dbb2b5f0bc9589913c866b5675ba99795d00cbc37cb52e5b9b4. 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/FROV61410417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaff7bc0457fc7aed60d7de368ff9a95f7d56ac24fa9dbb31bf0d5ba2944679. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ARA230900282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ca574fa85ffa69097dde9ea6027befbcf393f3fc6d2b6a0a38e103deb7924. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARA230900284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ff8c10fa37af4b0e1c59431df3c47599f48fb9ce19a4cff2fc64e3021e445a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARA230900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf644a84f03c0329987402c67c203fd39d9232022487b24f5e4130eeecc4d9a2f. 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/ARA230900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fad6d77a640bef5fa503c7b7924ef245307c1f5ce5a543f45f8320a52ff8ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARA230900287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547c22f43a90cafb98d8e70ae45359f56aa8865478c5c12d9fc0de54035f2f29. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARA230900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947bdbc4e982135acdee2fa941dfdacac96bfb46a8567048e6806b6d85dfa2ef. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARA230900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8ea4761f2b0e9a18bda827970c7af4129a350509f3a9698fd57cbf7c64bbb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FROV61410415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1fc2b1776b407ea9efb442213ddae031ec4b3b6ae6984e0408863f9d90e222. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FROV61410416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58390d76f5d3bf26912516d7fc017b183945bf4cdbf956a164fcaefe575275d0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES18B1703337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d1f7da36889755d300e9faf36fe22f61b1c3209ff2268c047e67e08f9739c5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ARA230900283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536f318745130879c2e7b42bbc8e55bbbc64e1b99977aa817d83e69284419751. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARA230900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f96a48e21acccf7d798922520b1d5ce05a85eec96a18df6a951d9b585b2688. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ARA230900289.