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 0xa4242df49f251df342b91a2ef0dd3749467a242a7dc4caa777548342c5f38498. 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/f2083f76-15e2-4911-a5d1-ba9ae913b174.json and https://artists.proofprofile.net/proofs/artist/f2083f76-15e2-4911-a5d1-ba9ae913b174.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 0x353a39640a3c4c3a4f5087303dda3a89c84760cb1788b6abb46369f3fb3ec192. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRMQ2300482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019369ae46f96714c52d7cfefb77171b17542f5effce9b585bff1558a35c690f. 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/UKRMQ2300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffdee66d1dd481049eef7605ddf3f8cf2338b92d6a4a27cf21237334f936404. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRMQ2200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e05c64fc64ec82aad2d2cb5589e0b962bb60b910ac58f9f7740da5baa7785f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:51Z), 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/UKRMQ2200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ec4425bf7d6889040fda27b7b51ccbb982f6d4bcb292963ed48863ad46b23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKRMQ2000894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd827c703f92021a023a4c0854b6f16dd360656fbf4f4e2d4c98184b421779868. 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/UKRMQ2000479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdaab7b2a170b217e42600f7974c4095c8da87d8741284cd909646b71352f05. 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/UKRMQ2000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ebf3203365579571ee4cb862bb25eef15d0dfdfa24b1fea100c07c9606b570. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKRMQ2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27d9eedbf030e27a978b6ad59fa714382e5488a81dc2d87a67683ca95cc2a3d. 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/UKRMQ1900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7e6c8e0f2be93dc46b0c63697edb7b6199f2674cd9608a4bea5c5a5665a1f. 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/GBKQU1915731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1129522b424b655b313c1098487e6d2c39ff58655ac6bc3a165c51c4e1423b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLM1S1801098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed26ee8e799fd84b42a9ae2d4a371ca53719e716d123eb01c4ac57b49bc61ea. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLM1S1801099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7370c023d047155a2e768bfa0d0ea5064209fb57049cb50d4b778c1eba491def. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:10:02Z), 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/NLD681800090.
FSOE 809 - Future Sound Of Egypt Episode 809
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61f4300ae589dd9b59cc25d2fcda133737194399cdaeec406c3e74b501949f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKRMQ2300679.
Future Sound Of Egypt 600 - Sands Of Time
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d5dda84fc4da30be736f15a9abb2e9234591dffa2a3767cd20f87a0bdd1a0. 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/UKRMQ1900599.