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 0xf7afa3b86a3a7dfce025b52ba1599e275f3520d95b0855a62057e2de405896af. 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/57392970-5324-4dbe-afe9-6129d5e1516a.json and https://artists.proofprofile.net/proofs/artist/57392970-5324-4dbe-afe9-6129d5e1516a.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 0xf6bb65afa3672b798d9794d5b6b9fbdc971dbca99b3e1ec2bc3104b1ed6303f2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6F2038631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc88e8728749bacc145a09f2074e63a0e86f3515a1bca8b62a68a434f6b0a69. 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/QZMER2055944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969fef0760d988435d8a3389fb412c229fc6f8c1e03289244d25ae168dc382f1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZRP52152609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546523fcba5048eb7224af6bb857c0cd50916503fc938046c0daa6128d07add2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZNWS2217978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546523fcba5048eb7224af6bb857c0cd50916503fc938046c0daa6128d07add2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWS2217978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdf5b59375aca6dcec1631b884ea988126579be1eb7faed3a213d093d4fe46d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYY2371695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0380d259a59bdb881b1d6898387624ed00612ba746af52e10b7df4e060be9752. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZQAY2451814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eeb21153b6686875e460e08e80c43b2158e88ef88ea9b35bdf0c9cfe6c16e8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZQAY2489177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc35b29ade764a7b21d6728683998c1b4120b902c4ce57046d473ffe2ced64a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZS7J2427067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17d5e65a9a6a96718ff3116386771a51b1c6451981a59be23c9f4171c1a78e. 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/QZS7J2423647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96bb6c8e6915e10d550fdd215d69c3e62b41880ab300b59b5cca452e3bb1c92. 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/QZS7J2480855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5d19d24843487956179ba4968f14206ac1804b12356a5bf4c3371266fef38. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZSYP2597444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84bc0a3526a69565f775475b7a2a35faecbcc00d9c8e9791de20d0a193df6b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZSYP2531778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938b42cadd25690ccb89c505e7596295b90ffcd151d1b38e9c0b5506b05bc46b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZSYP2538515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc3d96ce769b3593887f1051500ac962a9700ab0b60a37805bc5dcd824d820d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZSYP2500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a8018d7834ca074423913cd5fa8058e8236c2e8c7c3f4ea84e800ef2e682b2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZSYP2554425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e5aa92e1f545006ea299b02c941b78c7ea7b1fba0ca0a3d754ea524066dd88. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZSYP2579301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacda65dcafd1cde48084e900a1699e917c0aa25784a7c12907c7bc2ee5b0a584. 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/QZSYP2550057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdab073ce2418d8d7de8c5834ca9cafabb9e69048c58bc9d856057706957a86. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZSYP2500385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c1161f1f4b0fa6e2e17c171f3faff0685319b80b85fe3379ae1524774eaaa. 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/QZSYP2582908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c71d7de263f08316b06fcbdba3c844ea44edcf3aa5bb4d7c4c61887871c3e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT4K42557051.