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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2fa6499197edad585c87ab8e92281e819c8565fc127b854a432393e9cd1923. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0d9a592-90f3-471d-ab87-ddf67c9bba73.json and https://artists.proofprofile.net/proofs/artist/c0d9a592-90f3-471d-ab87-ddf67c9bba73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Skulener Yumim Noraim Farbreng - א סקולענער ימים נוראים פארברענג
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1936d61d42429df93e9d76c71a050e9243dbcb1f36baaf903cf5f15f6eaf800. 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/QZTAW2308927.
A Skulen Farbreng 3 - א סקולענער פארברענג 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8329329a1c75f842ab49fa9cc97558c63f1c5483d4f2eec54a4d43cffd0ea60. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES82345276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa0b2c3bfeec7a1f6879647f27b3d6a904ad3f5ebe49332ad7a1a98dc673aef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82345278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccf35bfab3adeea93add1ca8fa73501f139cd6772318e5234fd41ca55d9438. 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/QZES82345279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf7b80a562ce9afef10bde94db78f2bea8cd5fce29be8de7e0b5a0eb236552. 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/QZES82345280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b6b5444c82260cd4d4ebba35e4cf9399c6574060bbddcc0ff0868cb94ed428. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82345281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd58ddead0af369322a22cdb60f96a2288063699d8b8f044eedc99b82d6ecca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES82345282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438b04c930eae108aed098e58a3370558d150abf7e6fb9fbe196b57fcff75ee1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES82345294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25adf73363754e1364f67ef9d5904a3123fccedc6f84ca3f2adf7d0cd40e37d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJ3V2071731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c698f9dcec8360d9865b66652ddd682959df7cf7b85b189f67ed6dd715ce583. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USJ3V2071732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb2762131313f17f4b45999904a23c3a6c98f3a4a2996d3c27617e6df03d1b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USJ3V2071734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80e0dc8629afedec66a58d355a6f52097f5d937bc2261612b8838c0748638e. 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/USJ3V2071735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaea0c9a2e2d4024e2dbc41b3cda376cfdc3c4d3588efca3ef976f5a7ac2060. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USJ3V2071736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b89c6e67044f2efe67135db9c61421e811595f27667e52671bdae3bc685835. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USJ3V2071737.
Luniach Boi, Kol Adas, Meshoich Chasdechu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56910b8aca9eb8ab0aae86ba3febf91c1108f84511293d7665f6587caf307912. 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/USJ3V2071738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5f6ed36e1ff850559d62e26f4f0512f4d9d5ad60a32ac661297cc8ec3f86a. 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/USJ3V2071743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f2625795d69f601cdc9339f545052d432aabe7949ff1d6be237015e302a4f1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USJ3V2071746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ae510dc5d3eb02d2154e1427ed084194aff670e96c9ca132205f6ab0ede87. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V2071730.
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 0x92e8dd01d60160585081947347834efa4d7204fa85b8d30a90b8f5315fc71816. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V2071739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13be1886f6a271fe1355d09e2e8e639d473612debb3df755d7574a676e3ef66d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V2071745.