Per Nils Myrberg (; 11 July 1933 – 28 December 2023) was a Swedish singer and actor. He appeared in many films since 1957 including The Girl with the Dragon Tattoo. He also was a singer, having succes
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 0xf31731a5903eefd988246c17bd59d9c6e7167afa3579f1bac479363f5891fdf4. 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/8bf0f613-b5f9-4c0e-b6e4-f7c692510a1f.json and https://artists.proofprofile.net/proofs/artist/8bf0f613-b5f9-4c0e-b6e4-f7c692510a1f.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 0x0898a9d87fbe919051e24db557a213de0db55183f04e376cd3b1d7d6481e8eed. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEPQB6212130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1196b2e31f12fc01403a3f7f7b09e4092b08a007259c968222897847b8833e00. 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/SEPQB6510010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde95349b07fd5eb052d7f61e7ed63d043b6c9e01d92999e186a511026540b189. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEPQB6505060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61300432c91cfbe95586fe0c9e5e4bdb32daac1f70091d59522c2bfd2b9a1313. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEPQB6411050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61300432c91cfbe95586fe0c9e5e4bdb32daac1f70091d59522c2bfd2b9a1313. 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/SEPQB6411050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61300432c91cfbe95586fe0c9e5e4bdb32daac1f70091d59522c2bfd2b9a1313. 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/SEPQB6411050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea3a4f2d012bf25d7694e6407849e6d3bff9ef631189fc22b52377b5102b3b. 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/SEPQB6605150.
Alla Snubbar Vill Ju Vara Katt - Från "Aristocats"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73a3d89f501c3680e1f66b39710bf5ee3b928f623501904db804ddf13c0dd8e. 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/USWD10525111.
Havet är djupt - Från "Den Lilla Sjöjungfrun"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243c7989f401c46336a47d7ab1f67876ece5424471b2edc40d7aaf6b8799672. 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/USWD10526328.
Chess på svenska (Original Musical Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237739013f07750fa13a91717584141999bb54aa8960dbba7fad1349588bc761. 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/SEAUA0200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc386d9c0aa6fab1afc1ef47ac6595d91160786c0c08c974a59595771c6bc6. 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/SEAUA0200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898a9d87fbe919051e24db557a213de0db55183f04e376cd3b1d7d6481e8eed. 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/SEPQB6212130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa254710d2872ae9bcdaeb3a33d154a862cf6599c0184936ff41e47c8f4e2ad1. 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/SEPQB6510040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894d02682f23ddcacceaf53360d1e18b0d62d5e8d49ae62da55913fb3837f3e. 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/SEPQB6510090.
Metronome Records - 40 år med svensk musik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e7227ae9a39d571c3c6a662e1ea9942a17618bcb22db05e340ca11597ea989. 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/SEPQB6112040.