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 0xe59dd4844b46c82ebcd8c4bdd617fdfb775b67a500a28deacbffa045940bb0de. 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/462bb946-6265-41ab-8db1-6fe060b13d88.json and https://artists.proofprofile.net/proofs/artist/462bb946-6265-41ab-8db1-6fe060b13d88.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 0x32ee8da9e1fc8d20be3763ea20716ac7eb33d55b3de89b1006e37f3094d86cd5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:51Z), 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/DEQ021901035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6495b27797f69c4f320d03a743ceb63f19ac4a32ed5aa272a9d45e922588e8f. 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/DEQ022004289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b95dc4484f4d268cbe96020fae0f692483a28d8df82d85d10736a2cd02d535b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEQ022010835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9754f330db9b89ae10ba6ff283412d5b690b5d1af1d9cdd645b2d8bc3fa920b. 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/DEQ022106212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed2fe11e376c3e5eb5209c304510aeabde0fdf47e49ed4dd4b7d76e892b3828. 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/DEQ022116714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd93f4b33c261dcf8bf72b3865c8246a1c007ab9dd13386944f2ed9cecf005. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEQ022150424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f7cb9f061717811d43d700090d55d917deb533afd213b62634dff19838cf0. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEQ022118925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c11ac6ac5fbe57bcdaceb4e24aca84ec66228bfbfe0930cf133c0020444b42. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEQ022260018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbf9a5d1829609d92f7df0c8572b6afd525fd8a14ccf4bb1e338840e44e43f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH7812239349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2d677c8354e3b4ef2b6fd124f1689f09f3ad9fae44da91eaca0f473b667adb. 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/DEQ022382333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0d5c6cbff2dbd38b4cb31f344645b2f6a5ea981e888d2ea97144920541975. 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/DGA0M2329559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2573575ed7f6e2d9c26c7d196daf02634fd2904d3d887a6d70fb5a18a8ed0e. 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/FR59R2460510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae5ab3e77945a7881c54a9f0410994e2c39e6eaa9f22d081069d1f46d6bd1c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R2460511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc3291a16956e5542ce694c906dce1816d35a2b4a67b0eb14c9e50fd361b4ce. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX202450257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5eb4546f97cd7d3374fff539aa2454542f92ea58be36c49ea9700a098f5f8c. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/DGA072458142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3376a0ec2f06212ad6ee4171b8c3d5dc0244553b3bba839dd7fa0ebfba95c070. 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/DGA0M2476380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc3a31eece6e616b91d12c0bcfaae17e064656bbf410a8d0b104592954934e. 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/FR10S2529021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb683a4d3722fa73c6af1c481493f907a5204a3e11404d69bfa834561009d5e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US3DF2569027.