Dan Berglund (born 5 May 1963) is a Swedish musician who mainly plays the upright bass and is known within jazz and fusion. Biography thumb|260px|Dan Berglund and Sidsel Endresen at Vossajazz 2016 B
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 0xa560bfae7cf0b9765e2fd47a802f5ae915cd8fbffe3831b55485e9d9acb401cc. 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/9add0964-c4eb-4506-aab2-a3de70689c5b.json and https://artists.proofprofile.net/proofs/artist/9add0964-c4eb-4506-aab2-a3de70689c5b.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 0x0b9dbdf68f221e33ff6989de348cdc2eee3ae420416cde82549fe69658fcd776. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEA891600330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3bfbbda7e530de2e0662d0b56d2ea0cb033c16dea69e2b813427392a53b00a. 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/DEA891600331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260da0c3b801e0c5c644e2bb4c27abea71b13a4bbcfd196485050e6088cb34ec. 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/DEA891600332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf83053f96279b3b4e7ed7a80c0461b8d0b53204f5235d1915634a7d9f78cdbe. 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/DEA891600333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948d1eba87e2233f84f59132e76abf223221773ab3dd36532d485c35ed0ffb98. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEA891600334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c835e3e6ed39667a9cadf481cc5ea7da7ee892f96a177350f4d80885c6523. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DEA891600335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd0de4c5a72a5cac2c8ea634b8cefbff31aacb45c71682e7413540622cbed97. 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/DEA891600336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d6efc594959cbe226eb92770255939c439526ddc7b09064ecaaa66bed7a314. 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/DEA891600337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05317a05a70a9e215542d5cd75c8e0b2c0f9bdf69687d406fd53c65844484544. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA891600338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43969457010e4b68fdcc7755d0638a7c5a54398636eb1209d461ef2879515e86. 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/DEA891600339.
Händelser Vid Vatten (Blackwater) [Music from the TV Series]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0828e31d72781c806a84ccc30e3b2cf7638ca0525f92acaefc39b75ad35e9963. 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/SEYOK2301890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86168e7015092a87d0df070ef44a246e413c5a3bb23ce595bdf7dc6f0f1cdc79. 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/SEYOK2301918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db93d0fc0d3d0222cd1b7737e3dafc40d480e7a542935bde7a0d6e105d39655. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEYOK2301895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8427dc7474b9932222ef9e9e170844e61ba2cae655e0c18b20e55fdb57c5094. 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/SEYOK2301891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9ef9301322d0bb1bfbe29ee8fdcaebc4f3ac6d38e41879f63c4b3ffa8e720. 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/SEYOK2301893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc43a80e0b6e50cdad9231ef4cf856ebfdf38ff1c1ee9fbcf7a524160bc747. 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/SEYOK2301889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6ffc1a09711b5bd8572b80d828b6f0ea2206d089e44971dadbed6f5216b8f5. 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/SEYOK2301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84450f3eef15c4f820dadd8b5f9568d18bc6c2f3d6862b9d37390f62d25befa0. 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/SEYOK2301894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4b7bf3726bd8c5dc3e01d980cdfc177e76fb4a70619494bf7ecd0bf0583477. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEYOK2301896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580537c121b64f2017019423564096ac1116c6e2432a0b27b2524c2df6a88448. 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/SEYOK2301897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578280ff76fc0d9848906cd45b70a33703a257dba7ba89bfb7268ea5953c019. 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/DEA891500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1023ffd8f1c5e24b830b871da66d769ff30bc72ac8a7c4a80e952026a9677cdf. 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/DEA891500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de9126212ec1c0c1f5eec8e4c79e12a25e1db529653f9736218fca5146bdf23. 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/DEA891500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151c7f3012a82768b5f51a29ca7a6e5c0381eecd8adeab8988ad72eb9f6f2ced. 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/DEA891500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088c357e1e3e28ee076a5122429bc930f4311c17b329c216e6b4351f23c222de. 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/DEA891500115.