April March (born Elinor Lanman Blake; April 20, 1965) is an American singer-songwriter. Considering herself to be a "lifelong Francophile", she performs in the English and French languages. March is
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 0xe9d822060e26b638443c85138f7e3f92fa015cc4e95db95db704745f495955e2. 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/33917ddf-7465-4d69-a955-ad67fac30b2b.json and https://artists.proofprofile.net/proofs/artist/33917ddf-7465-4d69-a955-ad67fac30b2b.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 0x7d089ea6a85e301fb205beb43af44ea9e15a7cf4ec0f4cdd1f6a6869e50d2446. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:45Z), 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/QZVEM2310450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b5ac7295437a08c0da631b4bdbbae17e464efe09de200fd7bea1a850531908. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZVEM2310451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b41a71c36ceb3948383bdd422a9a95561198fee9d957c519dabfdd40dbd3a5b. 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/QZVEM2310452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e1e996211b84478b758a94d9a2f43ac5777213e0d9d456dab6e544c5cb417. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZVEM2310453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605027b5ad4147d3cfa81573b07ec355d437e518662c25dd82553ddf40d018d1. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZVEM2310455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46e0d482526eb66af96ad5bb7402fd2bc55f7cc4519eb394587c413446e175. 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/QZVEM2310456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa158e86c2acc4a98aacff16c26ec66d82aeaa14fb6c7ba5f777f279337e21f6b. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:36Z), 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/US2860439801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b52886896ed236e72b984073337afaaa6ce301bd4c62b81412c6319bd383b9. 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/US2860439808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38270925efa57903f1228bbc82b1826500104c3abadbfc507509ded0385070c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:15Z), 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/US2860445602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe841917f81f793cb1f54393abe0dfed7f37e2ffe6cedb2935ae323175a7bfb0e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US2860445608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c4c0e0467ccdbb54b14c50fba3d7366cbea9c7528bf42cbfda472903acb0c0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US2860445609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed1d83c664993e4285500b32a4f5166a65a151088fcf53770a118986e40f09a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZVEM2321039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c826a1ed3928bbbac65c78fff7f160416dadd1ee35611fa53244ddd79c58f72. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZVEM2322299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d73df89dfc22522e9234fd459d25191a17fcf6aaa44813a1f52e1c1269c0fbe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZVEM2322293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28803da4c6aae0d88bde55e43e1ba21a772d63e157a94fd2268a4843ff6332ff. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZVEM2322294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5dd0482b53b429af2b62e8463eb883b4b671c0e7dbabee0dedc46194a4bd62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZVEM2322285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4a4e5ee2455d32cebc6798dd1432dd5a87019f06be072d5c00cf1b0b46805. 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/QZVEM2322287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49da52b1970e53815ef6fd8efa0c61fc54d79c0d9a45873133f029473422422. 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/QZVEM2322289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acc9fb41bf70bd0baecfb3aa75e434b3a6aa1a22138f91a3f12f6e98d1fe675. 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/QZVEM2322290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddb3997eda6f7c5d35b99c34eb9803cb5533421e33648b4dcb909c361c7150b. 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/QZVEM2322291.
Chrominance Decoder (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc2a3e2c6a567351cbf26a98e9ef3677ac0de5d37d7e3079f9ba31048720d2c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/GBBFS9700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa209da2b6297517402f079a1abb18420869d593abac6cb309cae24ca3d5834d9. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GBBFS9700505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf511dfe72286de14b232e47af77cb05dff486ae67d49f56e4f99330925859a5f. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/GBBFS9700303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461e2030dcec9ce611e9ea1b3993c491532518b6acc24419a1511e4a8406a761. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR90Q0300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86133179811087916bc16550bcf6bdde36e57ae32053aff533b14b78ee544597. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR90Q0300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac48846fa7b0975055f4b811e36add54d839ec59a295e7942e0638da9bd3759d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZVEM2321041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164ab98b4898396df634ec08b70f3a4f7201575d0fd235ecf4f213f144fe36e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3JJ2100537.
Les fleurs invisibles (Official Music Video)