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 0x3933663b1893993fad8f3241f7df38960a86defce8448267fdbcbd94d25239d1. 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/7de8c63e-5570-4e7d-a7c0-b4cc107c2593.json and https://artists.proofprofile.net/proofs/artist/7de8c63e-5570-4e7d-a7c0-b4cc107c2593.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 0xee60a77293f9603b1308144fe721c876437241214c96f2a780a8285a442235dd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SE6UU2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cc1e327f543f9b3d45fcaf7b3cab0d3bc4a3f009646e7cad3b745077d47096. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:49:56Z), 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/SE6UU2300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408b72498659a7e116860b154caf3971901947e5bafb5b4490b6f640f4e97a45. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6UU2300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1170ce1165c8b119bec9d070bd7375a9cfe30298c49cbaa66c52991057a825. 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/SE6UU2300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d16efa9482bd813ad760e6c217e7bbe39b050f7abeb6629952d1b653125193. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6UU2300405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd486d1f643f9327a10fbc27135645b9a801e4e46daa395f64a8df02c7b5ac073. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:44Z), 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/QT3EX2445496.
SWEEDISH Open 2025 ***sthlm city i lågor***
SWE OPEN / Plattan Olympics / RIP munnspelsmannen!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a69c09cd7e7ce2c60de6aa2ace79743c91767e1678417e061acd909d356e3. 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/QZES62529666.
Dry Sift Garden Gullmars / (ångest reduXxX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bbe534c45a3fac1c9bdee83768dab05d34784f12bfe4edba1f89d325a65054. 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/QZES62529667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012c52abb76ad05b137ad1972721664869927920642978ba25670d1fed3440e. 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/QZES62529668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844236ca5f2e574ae8d6887939f94bd34de9f754c154a6977049ce5cb61b2e01. 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/QZES62529669.