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 0x8a1a83f81ee81e22bd2a5ba1572851c835173ca10f2862f10d3bd63f6b56d233. 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/32f402b2-ae04-4038-9d9f-8b246fec17d2.json and https://artists.proofprofile.net/proofs/artist/32f402b2-ae04-4038-9d9f-8b246fec17d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
My Songs Know What You Did in the Dark (Light Em Up)
Amnesia - Future Sunsets ft. Nathan Alef
Treat You Better (feat. Kristina Schiano)
Shape of You / Castle on the Hill Medley
There's Nothing Holdin' me Back (Acoustic)
Heavy / Numb / What I've Done / Breaking the Habit / One More Light / In the End / Leave out All the Rest / Bleed It out (Mashup)
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 0x079815dafcea30f590ef31ff13429b8895dceb2f791621c0db38f9a52856ff71. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZCE61835557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6b13dec1e2aeb021b0afae762984cd3fda31015b770c3bc90758648392291f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA51872214.
Heavy / Numb / What I've Done / One More Light / In the End
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c4e9d998f1abc807d667f5d7143f2e413d65d272a31ad2efd4b4eb3b41acd. 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/QZFZ22277408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a2ce94bf99d8018bd7922d694981bcda0e6ce56118fb4a45eb46f8d23a1bd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCACX1737199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237165e7491caf6b503165df5d70d172a4a90775af334d3f245e14b01a3e0a93. 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/TCADG1706442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909920d7dd6297bbe8d2bf0bdf8958780c44c4b5216ecded8c868d4b0e1a061a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TCADH1786068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955ecd8ee937e33b501a5ce6f3fb61d37ba877d21338ee79bc3c7f52f6fc699a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCABQ1353754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1707890af223634cfd44b6818912495d8a303451f8ec3dea57b2503bc78e3bfe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCABM1334047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7188ace2b566db811dc9069cf1d8acb4cbdb47558bdf093e91cfeaea8d91626. 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/TCABQ1349670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd51867dcd117da5ef31a1b79667590e147588c174a311d13f0d0eb3226a30c8. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCACE1593977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3947ec533366c918d5f746ef46a4b5a22cd5ae19b9148701e44777a5b8c59a. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US3DF1522105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782430693b8ef48f2def00f9b9c8da1acd031f8b78ce77991cc9f91de1328624. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZARB1853204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079815dafcea30f590ef31ff13429b8895dceb2f791621c0db38f9a52856ff71. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZCE61835557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ae3c6c00d1fe2e4aabd3843abcc3c74874f07d2eb0b9fda79d4a077de434f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN31928927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb5fcb4cf21a189a0a955ba920bf4752d43bc36725d570d3fb4a90af34ce96. 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/QZNWX2098693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86c022aae86664c0cdc5cdc267059c2f3692168cd777864228c1d02df14d3e0. 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/QZHN42240463.