Pink Champagne (first named Kasern 9) was a Swedish feminist punk band in the 1980s. It consisted of four women, Stina Berge (drums), Ann Carlberger (vocals), Karin Jansson (guitar) and Gunilla Welin
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 0xc8a17f4a864201978f086e942e433eeb2360a138ad1c8cc91d7147095ebfc725. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1468c7a-ac7f-4d0d-b133-c8274fa2624c.json and https://artists.proofprofile.net/proofs/artist/a1468c7a-ac7f-4d0d-b133-c8274fa2624c.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 0x18165ef7f58162074e7f24172047b749dcdd6ad4229b56056f7eda9b4c4c3ea5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SELAA8300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd55f7c37c665e767c4c29f3a05b5c4417b8254f95311ee0e415e5f909d1947. 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/SELAA8300903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3fb4d0682f09233383a6488d31b63081f95b021bbf236aa0d2126a0b556364. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SELAA8300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d676e5d070e2375b2ce0ecdaa57f12daaa6074408174fba5d053638c15689a9. 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/SELAA8300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101554d93be1e1b6bb44be17cc7022b1a935381bf79555ea1b34e5bea402063. 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/SELAA8300909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38884980dae457c1f5878f5060bc5570a292f8d8bfc3e1ba6c4029f689ae49af. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SELAA8300902.
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 0xe644108ac6830bbcf864e196fc7c47d3f17810808ff589376d5294238195e643. 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/SELAA8300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4f86c3f0e7c86a2823500155ca227eca01c8cd83ca85c5ade7fc5c3f05930. 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/SELAA8300906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c22fedf14b1e7151f3176994201e7069a58dc814390094538340882c75f3bb. 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/SELAA8300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b302d25f515d36beefa3bd8935276eed4c45fdc1ae3e39e8a45312203a821c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SELAA8200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8329e26bdd36e0610d2a20c07d82324bba89d4ab303b9702b68ee9b4e372f9. 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/SELAA8200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e4da6f7abc22226924f883f4103fcf7d6fbb9214967ed4972a1168b378883. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SELAA8200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76748188dbb8510dc2065354d03ac694fdebf33cf9cd7503116891aab4dffd10. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/SELAA8200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2f846ff499ac60a8c06f3aa49d65452d068b06a22ba9355ec3856adf400b2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SELAA8200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733c95a115b4223218e41548444c9b24ecee5e8dcfd89e55e41c40149c7852f. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SELAA8200706.
Den sista cigaretten/Du håller mig vaken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad81de1204b901dc408faea74a7bc47d1de406d1fbfca83e14043b01d1bf4836. 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/SELAA8201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883f7b48f78823bfb81584f137763ba989c55a2b5e76d452a633c67f00b504b4. 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/SELAA8200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86a08bb51697403699a72c0e2c495b5703f52820fab79613be487fee0b6d331. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SELAA8200713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad95f22f15dcd0a1ef6026b2271b05a571374c8d7980dc5d1a26304e128354b5. 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/SELAA8200714.
Progglådan Box B: Instrumentala, Experimentella, Urproggare samt Punk (Live)