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 0xdfb977c021b1a162353ff1c6749ee94c6ebca4d363a138ac788a1100ea5b5758. 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/bf41ce11-2082-482f-af35-7556c8f89d42.json and https://artists.proofprofile.net/proofs/artist/bf41ce11-2082-482f-af35-7556c8f89d42.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 0xcde10cc2861a3cff01db383a074847ab067c5a3ebc744a3d6a67b2f89267d6dd. 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/QZES82350555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95b13bd9288ab48c182ad2e79865040de4ad76eb0a9bbfecbac4cd2fcd024fe. 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/QZK6Q2341823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f652b49fb3fd327665ea19a5d583d84fb89f7d867962f01c4154e698dc55912. 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/GB8KE2405522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73190132436d6eb614c1fa03cc233d06cfcfdc111bd66ad28267cd8325fff394. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/GBKQU2434883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd8911446a9ced4cc17280ba1fffe39ecc7068bc1e939d2bfacdf3f07ef6de. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBKQU2434882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844c0f980ee84cd6b97026803af56735c53d7b77cdb4dcbf3983e0ce6cef7d5a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKQU2434881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0547dc73428d728d1cabf8c4a3cc4ecf9b5b335adc4674836751da904880e39b. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/US3DF2449419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f521d60c4555be93d65847d355f0a0396d642a703be873127ebe01f741207c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2409363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9be1b90be8f36617a168863cb95758336ab3bdf5f33884350b45482fff3c87. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/GBKQU2492141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4eae4b048580653b9e5814099ca7e36ca1fc1eae964647e00194d34f666f12. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:25:14Z), 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/GBKQU2497346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9653f382ca705113dd506ff9627873fa7e4334f1d73b34e640a54078db88a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBKQU2497349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797472ee8aaad45704f9022ea31db01acb397e642c83d68a62a40b8ef0ac4f0. 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/USUYG1597999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571414203de8c5f29ac2f37eb8ad0c625ee895e047e72b91c2cff4cdef29bb60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2502663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf032439936d53e2d3e22f4bb71ffee95b95358a8c5d61e89b0762284aec7058f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:06:55Z), 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/GB8KE2502664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5514ab73398bcd84010434a3974db5322216bc7008b5eb1724251732a3df7bf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB8KE2502662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d92288ae562e1550ac4195fdfce0ef03909dcaf0fdaf77ddd20001cf8ac372. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GB8KE2502659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328dbc9920d8f02fcb085c0b99a637997120eed078422aab5a6d521e8370a71. 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/US3DF2571451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66572fb897c2481185e7f47a693276d67312148787d3fa1bf75eba2422a8f28b. 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/US3DF2571452.