Smerz is a Norwegian electronic music duo consisting of Catharina Stoltenberg and Henriette Motzfeldt. The duo splits their time between Oslo, Norway, and Copenhagen, Denmark. Their music has been des
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 0x1cc7bce3d1fa3d699f2658f920c6db35e4d361a8f48c9a6e31cab1eed65f657f. 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/c1950789-85b5-4a5b-b976-1342f011a66b.json and https://artists.proofprofile.net/proofs/artist/c1950789-85b5-4a5b-b976-1342f011a66b.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 0x9ffb91b74c321971533fafc0ac6999a85a54cae50a7bd8f088df39cb3094acb5. 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/QMFMG2372940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a44f53e4db865f1f07318ad23ab3d6886be1d0ff4e5000d6e417b3a5e4992. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMG2372941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67532f5e98c76608ae04560d447c66e1db01e4135c3e75697ae3e3e4562473d2. 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/QMFMG2372942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5001050a31611750cef3f80351104f7713f4b1433f9a02ba604cdacf83a271. 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/QMFMG2372944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a9ecdec8d8280ba0d8e9859d6e1ee0e373ebfb80e5f6891386790e8e295521. 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/GBBKS2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0525f0c4d60d3b06d5f917a75a231e3d1e028918d6ce42f1679db84b161b89d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBKS2000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b0e1ceb9b25c25619af7073f7154578b9cf10a444e9d857409652aff2e9398. 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/GBBKS2000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91733d309f309c23e29e7761a55bc096ace994e5937941b3efe063d818234d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKS2000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e697cac07bdbbd9b5f58834dec9926d2c56e9d4580ab6acdaf12956cc51d44. 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/GBBKS2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4149cf74f86a0b9157f5d3a78a29b7aa8b511c2725530f9388e620f74d14a16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2407152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b4d796e7590dff6795523bb5576719555e1099984403a618b1bee96f781cbb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBKS1700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950018bb7c39277f7ded93825a0b50e984cea1b22dbe1f9a8ead717327f0df89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBKS1700236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00701e0aaac8ea4637dd2587f2c42c88f284ba25928675bda59902fb901971ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBKS1700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadd6f624451ebff91e33c3952e08c5cd7f6f14f470685d8fccdf038caaba5d1. 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/GBBKS1700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db51b17b83c5e41bdef56fcaf05e284831ca7571aa9336ee840a13e00ebbb03. 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/UKB871500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145a2d87393ba78a6210529231110b1c17bd7533b171fab88fb43b8458c4825e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKB871500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccfe3f61c8d561fa0b91af60ceffc5230f1ee7cf43b88979af3bfb674adc6a7. 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/UKB871500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feeb94e8b6925e64df728061584bc2528cfab00c973e4fa3a328f39fe00248c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKB871500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0594596af045bc3b897c84657d4f78121f388ccd3230eef147b2bd70081a3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKB871500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4022d26aacfa1e2ceacaca85193690bfb0cfa394f48f3b4754d5af80737ed78b. 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/UKB871500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6c9af78a488395be49375ed3d66fe1959320e5abb922836b0b8fc265e4bc8. 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/UKB871500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b91385722ce69357732be33d6c179fc2ae07a327e304a0ead33b3650eccbb7. 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/DEG932500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24e71c5f78eb2df7bbb7312de623c0998222a39131e8c5cc6da0be7db28365. 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/GBAFL2100435.