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 0x73a11e64d17208f8b5a7665e2f64f1c8aea0f66c1809ec54c36a0f606fe24b8e. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b65ad59-95a8-4176-90a9-7faca864d1f2.json and https://artists.proofprofile.net/proofs/artist/0b65ad59-95a8-4176-90a9-7faca864d1f2.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 0xc764959edd4ff747b576afdbd47fda52459d92d184032777781ea23730f73f31. 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/QZRP52173824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934c234fa3d5092f8640cbd35cc4c47aa8bbdd851ae5bac5a465a658e68a503. 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/FRX852408800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bf3030f271a7de96757333cb8204c0ee6addd2a95fc0d55ca348943b1c0858. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRX852408760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb15c8d344c6471e9876e2e84f2cd223a19589b177553c63cd7764f1da848f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX852308411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2299055e48ad063d7728ab05e24b63da582636e0523e0fe04ce06b08ca626a. 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/FRX852408770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d28f2cbe992079978769f64f074b2274be1af98acbb3c436428b3a16a256c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX852408780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d52eb5e9b387d776a4a3849c8604ad12f334e435398412a15dd6263a09527e8. 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/FRX852408790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934c234fa3d5092f8640cbd35cc4c47aa8bbdd851ae5bac5a465a658e68a503. 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/FRX852408800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43098d13477ea2594c3a25f2767ba89799cd5166d1b5a96c10425a11e5bd7e41. 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/FRX852308600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf967db840c9125ef74780aa100e4a4a42eaed6c516d908c85549019247a41d73. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX852408810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3ffb587ff9a2c50bc3ebea22cbeb047d69773cf0be3ef44cc2b68874bde45a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX852408820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a551e28347b96becccba9e3de3fc01f06973b75a188549fa524c49421052e58. 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/FRX852410400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8a67866a3163014baa143587f1820d95d75caef1baab5ffb63d08da37d9594. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FRX852410420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11409d36c77e3a751a455a8aa21671102be56a002acd6a0c9339bfae7297ec9d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX852410430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d89b6d1e61490971b82930fd93988811d574fa74daa46dc74f54a10b3e5b5d9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRX852410440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95db8d2946276647bb8d509cfe05d38c64addfdf67ca609bf62b51ba3b775596. 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/QZK6H2021607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f477dd44821a99d15a2e9e4dc692662aff19af86023c41a21258efd3267d0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR642101498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f477dd44821a99d15a2e9e4dc692662aff19af86023c41a21258efd3267d0f. 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/FRR642101498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c0cf3c14588e98fdf751717fe44939526981a0735dda8067dbed35dc34ef87. 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/QZES52367700.