thumb|Wickman in the 1960s Hans Olof "Putte" Wickman (10 September 1924 – 14 February 2006) was a Swedish jazz clarinetist. Career Born Hans Olof Wickman in Falun, he grew up in Borlänge, Sweden, wh
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 0x9285e95042f3c08fa9d84b9bf5b8bfa22f71304d86f4d03492e19786d5509eab. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24f1e986-9d89-4fe4-afa7-4395fab3f3ea.json and https://artists.proofprofile.net/proofs/artist/24f1e986-9d89-4fe4-afa7-4395fab3f3ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf77c364973dd56c56d986dd8676705341b365efc951174bfd5c7ff71a6ba1513. 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/SEVOZ8801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b7167b21225c2024d4d208657de6105085927a19803a48b0d090fb717e9f7. 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/SEVOZ8801702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4b59b2c8fa093e9e017807814a81ec6b2d7b1ec5cb90aad55c0edf7315b8a3. 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/SEVOZ8801703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd654c61aded19c1f62857cf6fcce2345dadfd2b5cd9475829d101cc0a62570. 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/SEVOZ8801704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a6e6c10667248e0ac57240ddc8339440f770bcea3c5e46aa31196e0b45582. 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/SEVOZ8801705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b544674eddd9c1efef918ff6add740f40aef3344cc2d4746329c46178d80646. 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/SEVOZ8801706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2984c35c31086843ea0a8898344af227ef55a071e9c04da10b8d4b728c83211a. 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/SEVOZ8801707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c3aadd7fe97c80e28d0e060099cf4658b727081c7aded9dbe41d2531a79e3. 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/SEVOZ8801708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff482aa85ae9e02580cac466a34b7a49f8f65e35c8c50c48bfc5183358a18f6. 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/SEVOZ8801709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc025ba0edecfb935ec4712ca562dd0f584634ffa4bdd47aa1ade3f0b3a85c. 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/SEUM71100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1f3b23062e3372c05458ea975b358fcc81dc974cec585c74dd373587f9a83. 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/SEUM71100374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aface8bf036b83a7ad8706d953fae458de44e399f61a20c96ecae16951a3ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEUM71100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f76c83059f850508de927083e28544d235ec596df22b2b890c14237c97fa3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEUM71100379.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b4eaebf43da40e05f4d712608b0c5e59a6e8a1bb036ac7ddf0f7319f259757. 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/SEVPA5001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef0a883fce75a1fd58d00468b5f370ff5823f1dd912f56ce981226a363d8118. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEVPA5001002.