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 0x630e4f27e44578afac542a3a890f1acbc2c378a6dc2c1b13ee27fe48eaf1b18b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54d005f2-f822-4abc-aa88-7ad116d7d50d.json and https://artists.proofprofile.net/proofs/artist/54d005f2-f822-4abc-aa88-7ad116d7d50d.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 0x96d3f62903786d99cf99b88df054d69e39461d229f966a4ef28d9d52d21e7c7f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAHQJ2395654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134cb53a8bc2a07dbd7905373f109f4acb2d2873c51bfa6f7b0abbdff84e995a. 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/TCAHG2331227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62e871f490ac35149b1e17b01969ab9c84135d3bb4f626399e21ca01ab4496b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAHI2354336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d25895aaeae011522f8b3f6cb926fb374b7e257e88ebeca1cb928a2fd35da7. 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/TCAHJ2397431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd521a86a373a1ec6b1efe9b411400edc704e4d31a7eb97a378eb96836693058. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAHO2326374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd521a86a373a1ec6b1efe9b411400edc704e4d31a7eb97a378eb96836693058. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:55Z), 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/TCAHO2326374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34ddd0502f2fb636d06730a08154b77c408efa5976573ca6930f5046efb3237. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHR2386886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82cdec20f46e7040497c970546de1c1f4e5fe8b280810eb3677509a2aba4ed4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:49Z), 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/TCAIA2412458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f38867c8661bbf35b69affd74c6a6d853660efe1b57e376f18fde465129316. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIP2453140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd716948a24e03f5fa272e113dcf00b816e7960f8ec69cde997cf5044d38bd420. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:43Z), 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/FRX282501072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873f7d28c486eed626c16c6eebde2f40c2c7306f9ee9d92a8b3d5afc50360341. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX872589993.