Plan Three is a band from Stockholm, Sweden, formed in 2000. The band consists of Viktor Markowicz (vocals), Mathias Garneij (guitar), Tommie Hammar (guitar), Peter Kjellin (bass), David Clewett (keyb
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 0x0095eb9086b8a5612c252bcefbbf5a2c7b387fb242b16b6f832333574f2501a8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41ee66a5-b44e-4f54-b887-3dfde796ec1f.json and https://artists.proofprofile.net/proofs/artist/41ee66a5-b44e-4f54-b887-3dfde796ec1f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e97b971764cb9bb87284e6f7b333748e6f157ea171aa05a7029fca4a586e86. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:59:22Z), 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/SEWLR0900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa3f5d4d44f4a0c0306222574a75f8bb95824c4985793626dfb917d0a6852eb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SEWLR0900409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80f36439979e8f17ad8c3d345f7d1fa6605acbfea2ac95c76eccac9a03bac73. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:27Z), 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/SEWLR1100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8821c6edd90054328e5d988442fb62a996f28f8eb52e3f58143e8d8856f4a8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEWLR1100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf5d8febbcfd5b382c7642341365364bbaa9c34a7fa06794b0c9b4c81bad2d4. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/SEWLR1100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8821c6edd90054328e5d988442fb62a996f28f8eb52e3f58143e8d8856f4a8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SEWLR1100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd11be3809f3a38819d7553ef6552ac35c6833feb3f6a3a4c260109c45757e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEVWR1603901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd146a960bb414a18fffd5d71c7e1da4a51cae0f9bad20164fba8110ff0d0c611. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEVWR1603907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a922a8a494566d969c1ce27f970bec538ea11b553212b0764890b33d7f395. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:45Z), 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/SEVWR1603909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6096c4ba84b4e7b68c2da6fa498cb5c2d3e6c5657af2f9877f3e6eae2a018f39. 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/SEVWR1603911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8359e1dc259f9a596f896e80b9ed4fed1a087373349036b7898b5c127aa1340. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEVWR1904201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129575e21e525b7b67a52d6f5d8b82d0d472008544909245ac2c2b6ff99705f. 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/SEVWR2205201.