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 0x3dbfd95ec758d5329ee72d5ac8d94d8edf8c02932a65dfd877350356d6e62e17. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f455a36-146a-48f0-bfc7-2ecf14eaa19c.json and https://artists.proofprofile.net/proofs/artist/8f455a36-146a-48f0-bfc7-2ecf14eaa19c.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 0x0f01884c1464a8fd44c2b3c440b0e34b4404e7b5279cc12d8d56e3ce9ddb8384. 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/US83Z2311048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311865f408ff383ee0c121fb1cb35c8a7ee80c8072566189ae6bf2cf070ee16. 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/US83Z2480120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b45f2854d3aec690fd27ea3c46ec61c99b0138063e0c889e0575fb8337dff7. 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/US83Z2464626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f34229fe14643ed8e4214eb7f6f42f8248e0a4fb5150e2317864fbed815cab. 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/US83Z2342777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75b051326e9707c86d34c32b0246f435e38ed09976f12971c4b312e39bcbeca. 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/GBKQU2341429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f01884c1464a8fd44c2b3c440b0e34b4404e7b5279cc12d8d56e3ce9ddb8384. 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/US83Z2311048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdb413355bc65d5240b7a869e6d7942e63f20fb5efb1404ee213886665278b2. 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/US83Z2222171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fd53f0d97420b492b66fe621a5f6e1d2bbd18c5a05bea32bffe05cca2c767. 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/US83Z2212989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82baf699723b7d94d70909e7fcf9aaf9f67a504e309a55078636718c66737c. 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/US83Z2208698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81110ac9b0e2df7b5865727fda203930e54a26f92e0aef0e1329c167da5cfcb1. 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/US83Z2208699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83820b62df933b26fc1a9252d518d59aeb775a53d26374055abb5d0b94ebadb2. 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/US83Z2121501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944b3af216b8a28c55bee2d72c2c612690568e3dded64b2e93d9cf7f5ce99d77. 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/US83Z2121502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a5e20bf67650d6e7a0213bdc9915b6c5f8d0408dbf8dba323bf248395d263c. 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/US83Z2121503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b282f2d4909935e921dbff1a9c4b2ba4596db62229a8726cea3fc5c3d4f2d36. 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/USLZJ2150518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a976df3d7496724e62504636483c46f3942d963558801b747b88f1ac51de92f. 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/GBKQU2121979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd18aab321d4bea4823f9f218566d379dff92e68aefd46abfba07be81dbf6004. 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/GBLV62007830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4546349dc5f17c8f9f2587a012553b49c51325ffcef89167718b6f00ae2a9f7f. 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/GBKQU1856474.