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 0xcc30073cf82a1ce67baa70d94e1573082db10e94205757d33bcba3970f1b9d0f. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0ae8971-abb7-4346-8a4b-befd9ebacb2f.json and https://artists.proofprofile.net/proofs/artist/d0ae8971-abb7-4346-8a4b-befd9ebacb2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Whistle (My Nu Leng 'A Little Darker' Remix)
Whistle - My Nu Leng 'A Little Darker' Remix
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 0x0d038bdf663bbed28a948b35e261a626953a244b507f34f9b1f82bc76f91811d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DGA092307773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbccde51d5174cf6477000857e88fd617b0d5f54bd1fa0ca8c291668a50abe90. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHN82447310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397b6bc8bd7b7f7954989dd966a8d7c83cb890068970f79943085cbaabceb0a. 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/QZHN82447311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcb739e392880baf49226227981af9535444f77a317aaa6bbaefb59fbce21c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN82447313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73266919ebfd74ca42038d709a2b87bc7316561a8de45f701238de62ee46e4a6. 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/GBEFR2309239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc0e79d7565f3fc500d1a96cf8be6085526897e5e30b57113491e57d1f2e380. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBEFR2309225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c702c775b124468261edfaa35db85b8c02b34d94a2fb2f193d3d7042da9513. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USA2P2417865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae65fdf50e3b4bcc73f3310b8b1317814a5de03f3a2cf1d5d7f94dd9e3f215b. 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/QMFME2389156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc010d201508e794135a20d9fbefefda373b75c2a08826f673016dd5ecdc870c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA092307772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaae32b0b9c62fe698dcbf8c402e45588cbc476945cf7ba9aa631efdefed8d38. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEPU61810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a29ea6142f79c25af1b2fce070b00b164fa93b68165df9adf99475b3941f5e. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GB6WQ2300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc6b5e36d7fd1f761f18786a249c3815ca737c3f937ba762162b621b4f72203. 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/GB6WQ2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2ed388eee6bfc802d9c85c866683161bfa03b9a4b30cc43f1d3bbff1774111. 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/GB6WQ2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7c734b645b0bdcf0a82f36887b9fe63f7de688e30a9d54ea5b7d099d9a1a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB6WQ2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225b197e1e886815069d559f9096ae4d26f6d4e65bdfb3524c32806c7063a72f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GB6WQ2300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a31149504c5cd22449705f72c9d5822720ea00869ffa8a8491049677e4af159. 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/QZTAZ2228501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f9cf503bf28cbeff39a60514d5defbd0e27450be534dd55dccbb2fcf14317. 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/QZS7J2485056.