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 0x049d93918737cd616982c3c002f2bfc5b8ff5f8a0135422ca818f6dc409c9217. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7daa98f-2ecc-4f2f-b21d-f457a9abeaad.json and https://artists.proofprofile.net/proofs/artist/a7daa98f-2ecc-4f2f-b21d-f457a9abeaad.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 0x589165c2b16e378406ae72ffb288854d6aa8e5309c51a7265fd79b73b11973b4. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAOQU2000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860852ffed4ff9d7cb972db5fdac56e106d10ebe5266d616a79f0fa8f69ed47. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAOQU2000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e6b6ed743f66712541d9f8cb0a528594f36d28404355c817380166108d9ba. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:24:08Z), 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/CAOQU2000365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b558cb3b08bee4d7e2ef413abed1370e3f9a09c9933eccb8e0ece1ca4a5e75b. 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/CAOQU2000366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075308ae020c63f69087db0b51edfebd356dde719beafbe742eb96c12aa61f21. 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/CAOQU2000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe364e6af41f189eedff52bc2d584a5fa976c4c447b219137e3eda525e05e0f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAOQU2000368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7905b2a395154f99856dc5c077441e254f6b50e599d6e37d3e006357dd6993. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAOQU2000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b090bffbb0b5f9bb4af8dfbbd46a4a7a35fdb090b2a4bc67d61d7e2a2d14f89. 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/CAOQU2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c1a682e3bfac203465cf68cee89ee5356211bbc787dba714b14624ee21357. 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/CAOQU2000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe012b40ba5941c3d4340bbd5668c034caf35c073d340d3d6a52faaa496caa7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CAOQU2000373.