thumb|235px|Plura Jonsson portrait by Tommy Tallstig Per Malte Lennart "Plura" Jonsson (born 10 August 1951) is a Swedish singer, songwriter, and musician. He has been a long-time member of the Swedis
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 0x19491423be0e6a4806e11476d911d907b6a4cca6aa4db7392cc44a48198318f8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db2d2bab-7707-47f0-a3db-cb814317364f.json and https://artists.proofprofile.net/proofs/artist/db2d2bab-7707-47f0-a3db-cb814317364f.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 0x9a7ef3a3e9b96d92c4461d9d768e1d5007da1058f834a444afd7cb81ed20e5a2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEWAT0000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad6c3dbe624c79dae50254f0285ca6583de883816eff85533726c3bec9aebb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/SEWAT0000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ada55b9a0b4a0e557b977692a89771c9897d9933d5cc7eb6877aa8c4675433. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEWAT0000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edfdd3c8845bea6fa5508b017ffda464e947f1e09c2f01b84ce2130788ce706. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEWAT0000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe130bd9c99717ec7c85899e39aae1ca671facbe586d51af9bed70b229ab29. 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/SEWAT0000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca5066886a51e58192020bd604ce7e2a1803c3622260f423237b6bb5d0320bc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEWAT0000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb4cd7ff898464f7c3cd3b8a0da50180ec87d91e88bd5992a4048cfdee4e2cd. 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/SEWAT0000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73b9ff3513287a4e961a67474882b4f03915f394b5cee5d60a56d19c57b951e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEWAT0000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a06df3d6bb59e44adb0ffdf1f567958181a03c6a3e84c19ce8808c8eed78b8. 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/SEWAT0000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe9b7610b9327ad34222dae2a54b40ec0a7d38d7636675e0653d23b29afc01. 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/SEAMA0700850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716fc543f6a1b5e6daad91e3e1c723cb36cfe619bc8ad152a881c993c8d926c. 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/SEAMA9847020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c34c1fe11349912c30c65c80dc511f23012ec9a3a0cb83466c4fd036fd73b2. 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/SEAMA8819160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd558e312d7236f4ca8bf60c3650ff21e2b23013e06e96f8091a3216c2a42e938. 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/SEAMA0700887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf801ddb8fc5245b53abe3da5ae8fb0b5670eb2e661943b17244d56cca1688. 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/SEAMA0700866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e481dfb21d34ca18f0786a96b0d94be6e2b9867d8d3cbb550fd333d4f24799. 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/SEPQA1100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee9d2626f9e3bae4391c4a273e29b92f1c7df8a30ddaa8344d55b7db3a4c93. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAMB9101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f75d092f919a5d29b205d602845bff7450ed339fbd2f7b3abb5f3574b8311a. 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/SEAMA0700892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e5be113c508ff109aeb3bfc5f7075a6a8d18fd389ce643e56bf7ac441214f. 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/SEAMA9847110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6280c0ca343b3fd367af3074fd38aaf339370c716f493ce09f54420d41aee08. 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/SEAMA0700864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa554b529dd369b0c065b4952a71d4e79878c1f59c6827eddb4924524540eb83c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAMG0500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e8bc08cd86ce624fdacbc7c1120b3f9adf5c19c8215aa4172072a089083c4c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWAT0600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed4c42e04502945dc223178b20f431d50fca70bfc5519a5985c99ac9bde097. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWAT0600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3026dba25d487a80b9c057e92aaa7b3dba13bc636e16b44f3320303bb04c54. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEWAT0600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd642120b3a74fc5c4428099c05ad7aec4a3c5a62d0c612e934f66abde0cf0f1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEWAT0600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17b89fc9e102f20597f06909b7b48b126297e522424ab9c22fbaff9387d8195. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SEWAT0600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296428f79a44127864e580ad66cabe7d6054c88040a4ff3aa385d69fd3cd528f. 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/SEWAT0600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1056eb6de9d07c2ee299eb899c888bfaf3e8e0744fa20be1fcb41650525a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWAT0600211.