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 0x18a58aa4bb2c7a6287b77deee20d23bf04673be709d0d92080c80a85406e05e5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab7d77f-25be-4fa2-a0a3-4521037bcdd9.json and https://artists.proofprofile.net/proofs/artist/9ab7d77f-25be-4fa2-a0a3-4521037bcdd9.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 0x77db5d54af59cc396d74c541b02294b04e49dc2de031998f8a9b31a4bad2c21b. 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/SEYOK1649026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be031f11e56f7fa3dd8ebf337891e7c76f680b7b4788d207483b745cc190d56. 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/SE5BU1721554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be031f11e56f7fa3dd8ebf337891e7c76f680b7b4788d207483b745cc190d56. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:10:17Z), 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/SE5BU1721554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abeaebecb04b6e4443d3771287bf42c99a20b9525f3fcc1582d28b5defa46cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5BU1790196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5a706e837065f6f919f69fddd851085fb3fb9fed226d3b93b702a9a44e97f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE5BU1826647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b4ee538697901954d33c61413cb92ae51572c8a3ace56f8031797ceab6d522. 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/SE6A91914577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f37cbc6f3adba40fae8105847b4cd551c1a9f9c7b35bdc7fa0ab1b44ec89ba. 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/TCAEG1964921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d2849e69dd8cc37f13298de39021e176b590673cc8fbf826cc27913646348. 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/QZFZ71970582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ef69fe37d856a9eebb18d7e9318efc0094a0ef029f794c18a024e310ef7094. 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/TCAEW2085022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25c900f8431556cdd92e57e292b71423a52888823312c1f6d76c00888a57c8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:24Z), 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/TCAGA2230117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189efef256de2c246da95efe82fa507ac9910d9e1794d18f682bb8df44c282ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6I32392376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189efef256de2c246da95efe82fa507ac9910d9e1794d18f682bb8df44c282ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32392376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171c494fb43329bb7584ff9134fcc22fad250ed1df3789eb2f222b9762f552b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2053496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e03446e53504c79922e1fda43ee6661fcef0115ff47778055c20e82babb8c1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6L2490070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c4a2432a03159731a5a941f46922067eba8dd75761bf3f00dc035d75a42a0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/SE4XZ1600205.
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