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 0x5da385cc1e15792845c7bcf660e1c1c870849651080d576ff1e237db508182b3. 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/47420761-6cfc-47c0-abfe-8dc31a2f9354.json and https://artists.proofprofile.net/proofs/artist/47420761-6cfc-47c0-abfe-8dc31a2f9354.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 0xa547b409d18fd848cc78a2cc52a1e9ce2d2c54d0431a56df1cd90ffa7aebd91e. 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/TCADG1795794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aedcfa40117ccecfdf30839bbe9182ca458f4f9e582ffa63e776567bdb023b. 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/TCADM1855880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a4203b8547c1c6af5b3434f6e423eacbc6853720887e3c4acda7ab3cd1b44. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA41841861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8fb7107222f65fca5d7abe21b1f6840ed77e2709ebd0ad2c92280fc2180fc0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA61928213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fa124b1bf3b2418e774eaa1549b1b536bb77cd5fbc4f46255fc23331326deb. 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/QZFYY1996802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394606c7f80e67b2e12c7dc4242eae62f55c872686cc369229f1e22c0426a5fe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHN82089553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e15fb72502efa14b59338cb22e75538e7093b19831329c6daf8ecf0d5caea47. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZHN82089555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a61d797cdd8af055ce50d6190a4e7b60e8a7afdb5f8eefd91842c80da48b4c1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZES62250811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd238e83afd8da4e15c9ca036e2a58878c40e10d4b149056c4ddc969978183a63. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZES62288273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a3c5ba4165a6e7107470e55695ef88b2dfc4b07e411bcae1dbaf75e0ec3cbc. 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/QZES92342179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe03b2e54a16edb8dbdb6d4d5ed5f2994548599526eb666f5198559c2eee2097. 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/QZES82163541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3fa0c3019a1a6f99362a4596760b9f081562a1db91500a389a36fda5debdd. 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/QZES82100812.
"Vengeance is mine, I will repay, says the Lord." (VENGEANCE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b0a9dcefb9a466975fa203703b6f766621fe32e2be9cafb2f27585469b5ab. 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/QZZ772443321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb69e2b045a9b5622f5c467242e36f1388b9a3651aad10bc84c85d847cc12a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAJF2575178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f850f9c7292510dae25203b3bcb9883bbcf0dc9d5c2f90f8aa4e33d6f9078d9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7N2513714.