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 0xefedcea19cbdcb654798d9cd4ae2a860031dce74b23acee8373f13a2114c153b. 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/c10b6367-bead-465f-8706-32980d1618a2.json and https://artists.proofprofile.net/proofs/artist/c10b6367-bead-465f-8706-32980d1618a2.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 0x6a55d3930336af85e4066b74f0d811de0994cb73bf5211b5b57da63b4a1e2639. 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/USHM82024214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f71597d7325e3c3b8906a458ee24d32e5d37bcc0e2536b991f23234f97de4b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:21:26Z), 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/QZDA42171912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f71597d7325e3c3b8906a458ee24d32e5d37bcc0e2536b991f23234f97de4b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA42171912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014b28deea66e34b50788f958de9926481b6df079f42610b306b22632b93a48. 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/QZK6Q2160285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c85a9b6d1508e1a38a22c5babeef7dc352dd96879fecb338c96ff5f35f112. 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/QZHNB2443674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e7a5847a1eb4c172a9de30ba9aae88d374a6659c451defaf53c94837b5cf7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZWFX2470224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a736f8ce57f95c1a2c1b559fb2bb403bafe3ca34d75edb67b0085062c38853. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFX2472840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396d2b5785a61fe35e5a08b66b4d29be7cc826687d547612f656413b73217ff. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ782469197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2930da153c53931dafe1fc4a6d883e3be1236dac7398b892c8322c0c4c8d45b6. 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/QZWFU2482110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc076934fd4cac62aa46a7d4ba05236f33d61d4f58cfa97a06e4405c0b8764a68. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZWFU2482111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4198b791e93f1f5358456d456e74c4e9e69d1aa49e01084a469386d38c97e963. 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/QZWFU2482112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced665db5fae8d4e43b3e82d1a4b70e7cc2d8adb0871df62c2da61dfcc224b6f. 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/QZWFU2482116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a280ef93598cb7e1ccd4882a329d11806ae3a8fa2da6938649cffda3cf7d7f. 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/QZTB52405435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ee231a4bf818c885d2fb64f1f72ca15a95d57a27feef2968e65fbe8e29870. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:03Z), 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/QZZ7L2487595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f2cdb6a5f1fc96a99f0cfa53a44cc7db5f00030a76d9aacd55b653ec6391e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHNC2554180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a443d1620cbf3fcc79c883f6a5fb195fdeaeaa151ec47ff175c5b2debf0f84. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:43:56Z), 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/QZXLZ2513214.