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 0x9e46933b0169ea9313888fc1b0e648212defde59bda2972fcf10f38eb8caff4c. 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/3f7211f0-0233-466d-b78b-faebf3eb9fdb.json and https://artists.proofprofile.net/proofs/artist/3f7211f0-0233-466d-b78b-faebf3eb9fdb.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 0x092d50b13186b6552d03992eb26deb2e0c8dac3bb31e84570c437b0d210cef6b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T03:00:28Z), 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/TCAIZ2463430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1707d51ed1054da50d507e24ebdc9759efbb96b47f06694576b7bf6f4b7e3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:13:05Z), 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/TCAJA2414429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969be505963e1120273b3b97394bcaaf4b045da956e3c48b6d64b48002dfe85b. 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/TCAJA2420888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb7b8a2393b98efec3e4344b16c4471032f87f85f57267f30b94a3adab9eec. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJA2429675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f62c31cb30da967e294b6c178fdf3fe62b1d5c79022861d9a859b161394cc. 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/TCAJB2441420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d116d3140a16467a417ad8805557c8d20323b807d627338409ec7099420e1e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:00:45Z), 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/TCAJB2448652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ecbd23b17dbff607f284448c741d7b612cae6582f3936f09f28891df9c7753. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:35Z), 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/TCAJB2494239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e443a5036e1491abcf57e5cbe7fb5e4bfdf50b2cb9ecc3d286f7927765ac5a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJC2402457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1913d23f2b568b2fd1870aa1eb35419a11c3da83189a5d61043665da849b6e35. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:50Z), 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/TCAJC2431849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ee8b38967d943e9776e5b324a4302112d13cdd03e2d1015c7366cffd2adaac. 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/TCAJB2441247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aabdd0c7c888c0303f96c79ed44d9e76cbffbe585d533a92f8c7a15a2e9246d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAJB2451284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea67315f58aaa926fc2cc3df66c0916ac452162e98cb904125b3fb37c1293db. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJC2472563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc537290c6b10dc6c9bc51b070617e634986672fbc6bb40302e9f249896111cec. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:40Z), 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/TCAJB2482891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275f3b75387ef85db0f8a08419da3e98f12609825ed7c33fe45786e6a1601298. 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/TCAJB2482721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1cc5cb8921c23ef39a5b0db3e8f9e32af4d51d5df57f1c3f057d6c03d013bd. 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/TCAJB2482692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd3faddc711e52b7187a080726d68dda14b6e10f537af129eeebfaf1ac6a40. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJC2482744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2690a1175485f0fe2da5bdf0bc1de653715aa1c4b7d598ccea8ee2218a8ec81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2482947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a46f43de65fc51edebb68b03d0edb068634e5d895bc73c3cf6d0d3bcbe7ab19. 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/TCAJC2453815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95146ce5a0c684dd7efaacabd298f37c6978bc48ada5fc536f173ea286d6c9f5. 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/TCAJD2453759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c261cdf4168f581066ca5cf1202bd4a2147a4445b943fa2dec7095a96fc987. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:25Z), 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/TCAJC2453732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7849c2903bea8a9ba88c3a22fa3edfab00b3c989dd4cf9633ef9a5c25f330f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:25Z), 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/TCAJC2453788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63260af2d22de3f0de3fb2ed35a6cb01569ff268556578a08f1ceadbe7ce1635. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJC2498235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad675e79195dfbd46fc62c2626c91052b6b2d3ac327dbf57ceebbe0c1afb1032. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:31Z), 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/TCAJC2498151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ba22e1de77a729594795f6bfff8d586b716cb046dbabd8f698fda7974be9c8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJC2498133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e4f2ed73acd0d05519be7dcd3e4393e95fbc91378895686e692f4cd121a0c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJD2474705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ffa4e7ed4c6965743030eed181590bbd39d388a0cda7a1ac21995d38814066. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJE2535265.