Per Erik Magnus Grönwall (born 3 December 1987) is a Swedish hard rock and heavy metal singer. In 2009, he won the Swedish Idol reality television show, receiving several standing ovations from the ju
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 0x70693bc5caa54a6e3e5d8e42d3cabefbc8f232b3a42694d9d402ba20d5e629e1. 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/e8afeb70-d1ad-4f1f-8942-53f3a466becb.json and https://artists.proofprofile.net/proofs/artist/e8afeb70-d1ad-4f1f-8942-53f3a466becb.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 0x439d6a9574a56f3ec4e02a1a76610de10940cc156f66970f6c46ce70f24506cf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:21:46Z), 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/SEBGA0900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5dab5a6066bea333bc6fff12745b442f4c4900ec2cbb8ad28e4ffef5d154f5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEBGA0900352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aced66bb17df62fc1803e3f43d102ba55e836bffa597855a4b2cf879706dda. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEBGA1000025.
Somewhere Between A Rock And A Hard Place
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6e9f451806fd4275fae183d622ee232b9eca765e33f1cb53798432d5afd233. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SEBGA1000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1666701e36ada1483c91fc3a2247885776bf55a5042d9a87feff8580d3613a4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:25Z), 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/SEBGA1000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49eae357211acf16fbb907afbc6e5361ef7922bef1779b00dec16cc0ac2b85f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SEBGA1000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f7b7cffcd044f0b55395a4a546bf5654a2e858d4ea26562ac5f48e4c5bb1ec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEBGA1000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0553924ba9483bbd2864547f96752d4f450a66156d97efc816ba6909e73530db. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEBGA1000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e0e1a2eb34cb0d6aa8c882831140456d977dab851f549251b062509fe16474. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE67P2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215e7e90a8a47d894e47367089df928bc5943b0be7d34886d7d2fce31b3fceb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE67P2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7edf0e90b38ef8e3f2a8acfe0cb6c54248ef548fe900641a851a83979faa2ed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE67P2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a652a9c0c9ce901eb8a016ffd66c25ded20ec2b24293fe8cf2b39237ee100. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SE67P2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb8cfee42a1a418cc999a946c796c11ea3334e124a49bc8cc2a8fdef409561. 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/DEH842400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb8cfee42a1a418cc999a946c796c11ea3334e124a49bc8cc2a8fdef409561. 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/DEH842400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb8cfee42a1a418cc999a946c796c11ea3334e124a49bc8cc2a8fdef409561. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH842400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb8cfee42a1a418cc999a946c796c11ea3334e124a49bc8cc2a8fdef409561. 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/DEH842400325.