Dum Dum Girls was an American rock band, formed in 2008. It began as the bedroom recording project of singer and songwriter Dee Dee (née Kristin Gundred). She is currently based in Los Angeles. The na
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 0x5e626f2abd7489801ca6a87c02fda1c6bc0381245e810c49c317357f8c7e84b5. 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/20c4f269-e3f4-499b-85e8-d6982a85b323.json and https://artists.proofprofile.net/proofs/artist/20c4f269-e3f4-499b-85e8-d6982a85b323.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 0xa03baf72684a262f500a9764514dcc232f06a523fd215ccc97ce8ee77553f6d2. 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/USSUB0984007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5b833d3b7fab309f1ce92d66498deb92489a628a6de5f00ff9c38399db094b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USSUB0984011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b592fcd7653a186f81daa791f1c335fd1dcebb7ebb19ed0563c387b1d771c7. 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/USSUB1091701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca9b1956284745ce1e595b897d37683f5c67da6a17ae24cc704268d830c54b8. 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/USSUB1091703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a72e8865a5bd3002476f2671966f4513b0db57726419dbd2a8a3e727024c89. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USSUB1195001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33f62d90b06df553540cd87d4fb5b953ec4242ba1897099c83ac7306384c40. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USSUB1195003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0f0979ebb904a2a95b34c2384b28f0c24aee4c5bec5c2830884ce873d9cac5. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USSUB1195004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf235d63d78f1d56515718d227e57942c81049acd3f1831bd8521a0023e38aef4. 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/USSUB1195005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b7b768c5fbbe30aedf93dfbdbf42bba3745c56febcfce40ff493c80133e79. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSUB1195006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565c132ef59f00839275a0fcbad428712db8c03fab01e33bf7a43e41bceb50b. 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/USSUB1195007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30521eabd09be381667a57a9b57c3f79f705cc0f9456a754ee6448f2457be534. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USSUB1195008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641799cefada33bfeed93eea33c8e06b1a14b4aef703291add542636aa2bf0d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USSUB1195009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bd1701744b0757fc40a7a9520358da46aec594d0918c6dca57bce5e31fa10f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USSUB1195010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b07fcae496fc9d14f88f39b2a9ad057853a50cb7930f067d09c595f652495. 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/USSUB1200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9a42dd330ca570c226f2253ef21ea814b4301cc7901dcbaa3eac5aae124b59. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSUB1200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0624b71a49f3629e35885b941442cff6c0c655731914a4b632886e5a76611427. 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/USSUB1200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05857e592c9ca64ba0e34b528623935694aa9062a1799d32ca3918e73a837487. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSUB1200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e54b379ba6fc776daaa55d9bfd233b29d21c5eba5a8f3fa2852ad84c0548a7d. 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/USSUB1304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8260ec41e308f4a19494fa1da4f2ed0836dacc100f7802b62be37bef67268944. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USSUB1304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d1e232d5685b534526bc30445037db66948b3e74f95a7233e21a862103a08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USSUB1304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468bd021fd45a2fcafa3d29ad122227d0ca36d27484e08dd1bd16c01540cee7. 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/USSUB1304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce16e7693853ab1789f395aa46641429664f8ed608ebab2db959be2fbb456a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USSUB1304009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86261c0479d2b9bd8bed7f28b18438ff14303a9b2f43da09321b8d03e5c37ded. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USSUB1304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c3f2f9bcdd5b13335f1c8e0dd63ce39991c56de9a88acc707e02a43efd594. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USSUB1307302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f48e8c1e418514316dee93180c3595dbb52e61c4bcbd01cac2464e90577fb69. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2644357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe05e7c0ff31904bf2f4e5f8d16cb544336793e8db419cf9bc6c70abe913ec39. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM6XS1576594.