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 0x5e4ff3dfb55790f9d9cc1ad6647774eea66fd22ae8d2968966936b1af918f312. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c6cb6c0-03c1-49bb-9f3d-3c4a74005a9f.json and https://artists.proofprofile.net/proofs/artist/3c6cb6c0-03c1-49bb-9f3d-3c4a74005a9f.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 0x7c9555ba93d5ec446b761e3f3dfb494c869d01e10ab47c4aa48923438f5d6515. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKPL2168384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9d1b1d95e3099fd68bb84c0779933d6d3abb4160f9f3e5b8cfdb2708c0d48. 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/QZNWU2002784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed34eb404cf52149237ede6e3b7e8173e56a7fb7af9525aa3a73ef532927e07. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL2177093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db68b92cf6f58daff989387d79bf6a84831f51cd93229735da6f37b46ffbc82. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZY7Y2300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe023a35dc541396fe807224400bac963e67068c95e06bdaed45276181b67d475. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM24S2307432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a55a4ebafdf328c9b92b24addfa227cc69013bec74dc7d61e3001a96fd6ba7f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZY7Y2300323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362bc2668a1c049d135dc043452cde1457b42c47beb45e3f1fc48e89d4daf4ad. 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/QZY7Y2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b11a1c5f65a6f1f3697a8531f93b3a3c2d67ad742e3af2662a89761f616dcc. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZY7Y2300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daeba7aa939279e78028ae1f537530cb08293e26368c49b82a156f43ababc98. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZY7Y2300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f283c35f225a917d16865dac3afe04b73e861d53571b4e8953a36c4876dc489. 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/QMRSZ2500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c2cd843b32761dfaf3b96a599e579a6ac13fd73b6d8ab9a747d096b60ae419. 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/QMRSZ2500339.