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 0x4c337ec0e66a511e4475888ef8f94a762a0c11d2752e2e016dc10ca7614c5b32. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1362b28-ae37-42ba-aec9-9da3e12ac9bf.json and https://artists.proofprofile.net/proofs/artist/c1362b28-ae37-42ba-aec9-9da3e12ac9bf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca966a8ff59286145da302733ec9b33457354906e7e4885fab915b0c2bed914. 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/GBSV51900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fff0d6a22a6e070745e13dda23c59c1b9c9b1a771f87b0acfc6b221b12ee04. 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/GBSV51900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384321412fe2d3f0644f298e7f626d9ec063b6d5cbba83a68c0f3bf4cf4969c0. 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/GBSV51900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf6687f1aaf508c4ff391a9f0cd8eeae30ace501f33a67f8e089ef690367f4d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBSV51900007.
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 0xbfbcbfe74fca2b72a81a540f71598703dd928906c7a975347f2ce18be9069220. 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/NLUS42000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f83619f815521090c7f3c911427aa7df02c4f62f0ffd09eba997cee3c0432. 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/USA2P1933108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8fa1bac05330b39bc500e80bf9d142f7e57d7ab0cb2017258ee1dd2936167e. 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/USA2P1933105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87ec125b45cd5ff9cb98f888f5d9c8853c369ce0810add99a594f28f06767dc. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USA2P1933103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09296dab7a50b998894173b7287922e969c856a148e973ed0f109fb2e1e05543. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA2P1926441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac1fe261e177c85783dbc96530385035722028b8328f32914d307550f9bdfbe. 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/NLCK42403438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6355f237216681382b5097b64d14491c5390de9a2f0b93495bb2e14a7a64d09. 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/UK94R2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db613a7d3eee05acc15cdb077577ca1fc6611bd068713b73371b240b9d3d221. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UK94R2000017.
Zero Nine Zero (Response & Pliskin Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076401234fb4a8a4b485849f4a9792b17bfd4f78e5ab61a5844a7cf448a235c9. 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/GBKQU2189260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48b7f5710c5714ab51985a01861b1e12602f83fbc304140a8069bdb21827b74. 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/GBBHF1340093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078b12ca383967830984be208024875cd7cd0ff5fb8779e1b23c702125e763e. 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/GBBHF1340095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f001ead2a5f7a22552f9c60d32aa15cbf0df4c358a12dcb4fde9012e0cfc66. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBBHF1340092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f853d3413a482d8ad104b1ae32e1fc6974cb8ff1d8e6b09f5f58b1618f25d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBBHF1340094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854776fc16b493493439fdac4dbc0f8285b8b97dcd5196603485e555d38d326. 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/GB8KE1855194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a9390592fde02611be48c7db24d8bb1c574735b9a1edb8898dd56e16fbfcf. 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/GBSV51800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb717d59bd76f4829f44d29568d379f8a80b67b536ab3816bc037de895b948ee9. 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/GB3SR1000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e31806c71490c69b2fcfb053d7a311dea2b647d028354e6e23e34983ff0c384. 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/GBEXH2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fd358bcbeba19555e424c930137ee01d4610541c70e8e35bf7ebe0f00e066c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBSV51500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f9f62abd783a1e9506d8029301f99213a08bec023441f020605e768bd68c5. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GB3SR1000117.