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 0x29e35a5320c8ffe99ad2b6c4093081d3fd773472a0cf621303afd9644bbd915a. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba77abd4-d13f-47bc-aedf-505705b958ff.json and https://artists.proofprofile.net/proofs/artist/ba77abd4-d13f-47bc-aedf-505705b958ff.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 0x4b08b1ab69778fd276947ed4a82996d5558c27b6287fda1514ebd880b6834045. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K1718509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5d60563c5332b2ecdb39d589cd6f27e801c5d0115885323f63e89624c735d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM42K1781227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce161ff3efd7f2d0eb7d72f5aaf206f87eabeeba31bd6c9edcee8f1a38f56a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM42K1732725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eaa1e6987d3cf7d441c8adc866aedb08b0f9436e09767dc2caf28d20de02a1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM42K1790767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd85686633bacd44e7fdb2d57f68a842b1c3e154b7540a52180af77591160c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM42K1787520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0640c1231827a1d0ee519614a322f0decb9a63f40643eeaee13a0114d70714aa. 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/QM42K1767551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe5c425ff766f5093fce5c9aefaf782a78437bf12ced8a163276741cca5e50. 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/QZK6F2071975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7174a7a597cea52ace38e4506fa4b212904e1dfb0f7770f70b1bf1867847e2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZK6F2071976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149cc978476ea1b81d19cd4b5dab84066793704bc4679107125287104946f3f1. 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/QZK6F2071977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a80709e0e45d3a0ed31ad623e19a931c369d6315debb5c1b85620d780cf190. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZK6F2071978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9af92b6a3bde6c056327b8080db8e2dfb12006dbe0b71d06c3b83fe8c46520. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6F2071979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04cd289609059134c8fec918e6d8274cb363e5d19f9be7b55486431330c8c48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2071980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea868b08c83e94a444be5d24d4e5098cbf6952e040d62c287e2e3b327e0299da. 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/QZK6F2071981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0411a75e381491e60834460e11f015105be433c89d24999417d405ec94fb9189. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZK6F2071982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407af37d80c16b22ff915cb85763fd2979e8c4acd5dbefea5dee9a746ba3107. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6F2071983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa3013c36b5939d455ad7c3fee444d749e9f69a0649ef9d40b95e0a64c55e9. 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/QZK6F2071984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46815a7563f203680853a02cec0673502a871bbdd20646f1679835c94c7c5579. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZK6F2071985.