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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa320a76f002a84bd8a4563fad67de8bc22a2f9bd6d332344b9bc79a9ba13332. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0bdd9b4-03ed-4004-9a63-eb5c2b8c78fb.json and https://artists.proofprofile.net/proofs/artist/f0bdd9b4-03ed-4004-9a63-eb5c2b8c78fb.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa66d235a35d48c1cef903ee2bd6e71a1f27f5a02365f68a4887d2dedb7b3c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CHAAA2425550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584fdda41438ec9cfbdd7251cc6d887d7db94fabb00f6a8496406b866ad106e4. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/CHAAA2425551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714f31de28808504444b7cba41d0fe26d9451a99632aa30067dbb9b73986b2e9. 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/CHAAA2425552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc92a551c7c12c1303adbfa67007f6655e6a310b9268a175b0f5b25a3e548d6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/CHAAA2425553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa976179631b22bbc23d8c7b381e0a1475bea8be6eb2d4b92243ff3573a493f1e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/CHAAA2425555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd3f6cd74da68df4fab9fff38864edeb6c554f30e0a240260b54a173a23829. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CHAAA2425556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89248354f1b55562a8bf19aee857a8531e0494338e4457e2bfc682375f6c86. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CHAAA2425557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b558a952d8651abfc68950cfb6ac3c4e0394ff953b5f1ce6b1fc66332e9954. 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/CHAAA2425558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530bf7b0f78933c766c82fcd0b1062bd54bba116de69ab6e8864cb79791a20f1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CHAAA2425559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58996f9bb11e32339be38a6157f0902874141f38a022942ce2b054b29184031. 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/CHAAA2425560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062fca0edb4e1b9f65227b33b479ba886ad3a0dbb366f851dcb1e10ab825db46. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CHAAA2425561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad23937ca34b7bb1b36ebce8a03ac482710146d1982ccb5a00372dc91f0ff80. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CHAAA2425565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49103c115e0fde19c277599605af60b38548ff99eafcd1d4d5102b1375fd57. 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/CHAAA2425566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dec834871f8aaae280fbc9cf7f7a521bde9e788642d9a48ff95c88a4cbe1d8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CHAAA2425567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29441d17340616b014576a20e432f068fd58f16e9adb5958862905157c9d85. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CHAAA2425569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654935aca054bfd4f747474bf102f95070df9f2143e3451dfdcccd0a4396e32c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CHAAA2425570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069c9ff89c6d1ae9cb66df80f2cbaea8111d21bbe3fe8f1b9e2973e7ff4a4fd. 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/CHAAA2425571.