Rupa and the April Fishes is a global alternative music group based in San Francisco, California, fronted by composer, singer and guitarist Rupa Marya. Marya is also an author and physician, who teach
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 0x8da7d3eaa2753f72fedfdafea0e7703e21a51d9f3b254e585cd1f485801c097f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7afd83f1-3b9b-423b-8b0f-79ca6fec8d62.json and https://artists.proofprofile.net/proofs/artist/7afd83f1-3b9b-423b-8b0f-79ca6fec8d62.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 0x8176cf1690cc1d35f764b00c04f2c3c411f8677e463552fc7ab8cb5deff3ebdd. 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/USGFC0800703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29492aef2f61bff86afc647212596cb255589a12dbdd90acd7be674118f82dc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USGFC0800704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e9b07d470f0de281a78decde90aeecc21627d5ef3f8deee7f3bf2991bd3488. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:02:52Z), 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/USGFC0800705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04794102089e93081fdd245b30ff12ff1c89ebff98e5bc046206fc1d803d874. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USGFC0901504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceca9cc8a0a3cad8d024ca90fa1134ae6b0ee104a55126891487e7ae88c46ab. 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/USGFC0901509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f9f7e50a141f7c5b165c63b60a61c2c9b31dea87da3e3a6b8591eabbea08b8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGFC0901510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9db76bd0661aeac28aa13efe511724d1dd55bf5dcf110f69b8b71796429437. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USGFC0901513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe9264b0329e1ee452f4aa1720f1b195b7bab1d8c9acded0fdebacea5db5826. 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/USGFC0800708.
Babylon Bar, Vol. 2 (compiled & mixed by Gülbahar Kültür)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11309914209ed1006b64772bbc2bc6788ad2e26440816f0fe33b354086b87d8b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GB5CD0901502.
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