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 0x87f4fd62d633089cb486cb0265af3fe736e996651135c2238c5d8467e618456b. 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/88df672f-f28e-47cb-b8d1-42185df47c6c.json and https://artists.proofprofile.net/proofs/artist/88df672f-f28e-47cb-b8d1-42185df47c6c.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 0xac7f9eac63e6ecac129e1ea0a6f6bc42a49a232eb825fc685ff06563dba5919e. 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/FR26V1645121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c233376791b888043b3c926046ff2cbf0fcedba54daec6301aee35dee5c30. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR26V1645122.
Freedom in the Middle of Nowhere - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527411cc9da6efb7440a8599265ad680136e2511cb81dcadd816643e03ce838f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR26V1645124.
Blue and Yellow - Raphaël Vallas Piano Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07733474feec8992ffe8859715b625334ce174280feb377324703085e05d6a7c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR26V1645125.
Freedom in the Middle of Nowhere - Raphaël Vallas Piano Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfb5edef1c2f97af22bf42d48b3b17cc490959490f10c555c1b01236f89a327. 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/FR26V1645126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa53f950a5a48e12858b1c986a43bf9dfc02fd540fcb2bd53022d5451f820edf. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/FR26V1645127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a26fff6f26e2468c13f32a21b30d24b8c4627ed91ad2cd50088aa3f5fca6b9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX281964100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fe698ceea7616683b3e00f91e06718a73d2dd4cfba3f3f4a41ec9277f74b4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRX201900985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431cacde76add94a0937c7d741de92b412029aed8055e9d4dc633f0570f5aab. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR10S2133545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32db224c21333896987d410a94ec9f49a2b3ebb2a343757f5bf9e8daa8a67e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2220826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a334c3a6913b0406624e31bc9798e7995f07d26e9e11e11270e86c5c5ad623. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMDA62264770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e6fe2094814a83e747a04bca03951c2e1ab718bf3d13533ed1378ac1263ac9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMDA72202432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde21406c01bd6f90e098f42ee905599567fd673cf7048be800e6889de43b03c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX2219251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb551d47e97ae2f1fdda59ebd2d15c91a1ce595b87288e555382fa250536f45. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM6P42320454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270bc3fd46efec2b995a8813b2511914eef8fa55140a9244efcd976f4277c04. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMDA62332707.