4 Non Blondes is an American rock band formed in San Francisco in 1989. Their lineup comprises Linda Perry (guitars, vocals), Christa Hillhouse (bass), Dawn Richardson (drums) and Roger Rocha (guitar)
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 0x16097c0e53e69e446fa78cfac707d80c93f9dc910e63d7dcba79ed55c3f4a518. 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/9132d851-30be-4f6e-8376-1d7e4f4b3f4b.json and https://artists.proofprofile.net/proofs/artist/9132d851-30be-4f6e-8376-1d7e4f4b3f4b.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 0x72c398efed4f7f15c7094f05fec8f95b3026b8c41ccccbe4ca928b68be709d6b. 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/USIR19200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129b00168c132e74262685936a6aff2e6eed2595fa9b10dd72e04eee91058d3. 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/USUV70501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eccb057be9d5a768ffe6c6068571e9bdcba62d1506be19808dfe211268d7a55. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX5MY2224574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c398efed4f7f15c7094f05fec8f95b3026b8c41ccccbe4ca928b68be709d6b. 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/USIR19200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c398efed4f7f15c7094f05fec8f95b3026b8c41ccccbe4ca928b68be709d6b. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/USIR19200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c398efed4f7f15c7094f05fec8f95b3026b8c41ccccbe4ca928b68be709d6b. 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/USIR19200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded1eb737fc6527d0625739d4f23d770fc4c2851a5754e7f0544e4f8c8b20d0. 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/USIR10211669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c398efed4f7f15c7094f05fec8f95b3026b8c41ccccbe4ca928b68be709d6b. 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/USIR19200553.
ドライブが楽しくなる洋楽ヒッツ！90年代 HITS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded1eb737fc6527d0625739d4f23d770fc4c2851a5754e7f0544e4f8c8b20d0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USIR10211669.