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 0xf66a8e8dbc99ac39d943644cc2d6d48147fda7e1a3f2dc20f2b34f2676e7c900. 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/3d590192-889e-419e-b4f2-fc8b404652b3.json and https://artists.proofprofile.net/proofs/artist/3d590192-889e-419e-b4f2-fc8b404652b3.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 0x559c25cfccc75f177a417a4c4bea405bb0b150b30d575eb602d239c0158628e4. 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/USA561040105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e4c2ad8e55642d5360bdf6357446adba02fe3bf12c67c1948cd3daa97facb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:23Z), 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/USA561040107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b1af5233f5fbbb0c480b0d2abb44b547c129547a452e38f823a1d1180e9aa. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USA561040118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165549bbcf470067a75eca212eb860b30fb347affa7c375f84d2102772010ec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA371698478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e381a99ecef32c889a0543c8ab1b8c72c0c8d93b738281effe4a9b3569db9b1. 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/USA371698479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5b795d820852376856135bffe1fd1b98ed7c6602b3c85926d926df6b033ffb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USA371698482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f6c268dc672193c76fd6ea85a2c2de53912276e58f65f5049a216d4247901. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:27:57Z), 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/USA371698484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b378d8e7b4784ba33fbbe6f435409197e3241c17ced1935b1f95e02d73bff1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA371698488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f5d136e0d59fc94b30795c19c13dcbe240faf2928224514c5b77190ded8432. 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/USA371698493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb9abcfddb4c082b40656a38d3aaf5894e2618cab502c9704172083765f959e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMFMF1349207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa110e932d1231138202c706c4c6dfe360cda5cf935739c57c5d9a8085a7b12bf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMFMF1349208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791aca85cb84983378fd48696dea898f108eeaaa4dc4ecd82e9905f7c2182e3a. 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/QMFMF1349210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25d8149b8c9df4dcc63f1a240db929a7ac44f394097540a60a27ef26771c237. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FRYAS1007194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5035bbd1d9498e6b7abe1ac458fa3b80f5a5709c94e303d474c7355c5c4059. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FRYAS1007204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d1bfd16600113152608b68193bdc603168914cf88a53b658b6f7475cf62539. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6P41775196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb785802a00feef0e164bfd3266c05d22916cde08977986bcbec6dd7dc6454. 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/TCABB1111240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c031ed11d0a4db1fdcde19fbc8b6e72dba6bbdd25713b219e7b6cd1e4d8c18. 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/USA371555137.