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 0x924e9a73ec826d9dd786734814ca3c37a1286a06862859e1dc67ef72612d5d27. 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/70be9420-b9b2-4d00-8704-fb2f0b8c2b37.json and https://artists.proofprofile.net/proofs/artist/70be9420-b9b2-4d00-8704-fb2f0b8c2b37.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 0xe48f7d74df6ad66359eae5f3a2e7fa63c642cbaba22654cf4c0fc05470ee7675. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLB171000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c18693a1d64cdbd907cbd3660d4e59a9bbb6c845bd4ac012a0b1b67e0fe4f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/PLB171000382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dbf57e985d65b971d7884f23a59c020ca3dbed3a6aceb1eebfcde898852b4a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLB171000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e17f7b58f669d4f0b85714205991c893c2dd89b4aa9dc4c4d99d02b5a3f1c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLB171000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0896a84bdd3a83b14504142f0b628c33dbf50ad4c83742960a256a06c480a0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLB171000393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e1350b36ec894fb84c7109eb15864dec867cae76cb07921a39a8729006de0f. 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/PLB171000394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8320f0703082f50496fe4afc510e6e7bc9cf7d92a005ec85700486c9ab4006f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLA391592012.
Agnieszka Osiecka - Kobiety Mojego Życia (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c79a32eddf6bbd7708fc2b6f21e7f8d463ac9210264e390368011b38a1c76. 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/PLA247215903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8320f0703082f50496fe4afc510e6e7bc9cf7d92a005ec85700486c9ab4006f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLA391592012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69709fbdea8426cdfc23afbf9d616e19c3f9858742e913ebd303f25aaba596. 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/PLA391591714.