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 0x574394ae96f4fff9293f6836e23404f23a531cd4068fd39c17e7077c3e7668c7. 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/3da0c1f4-d7d6-4e72-9c4c-9a1e46d6c84b.json and https://artists.proofprofile.net/proofs/artist/3da0c1f4-d7d6-4e72-9c4c-9a1e46d6c84b.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 0x6f87f4b276fe8e7366106145b6e59631259d494a5d838a0c1694504b4d5bcfcc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:47:34Z), 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/QZDA62112248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc696b8e1c2ab905511dbd5afc11875290504831c7e589f0db5d2ee4050b114. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:56Z), 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/QZDA62112249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de9d44d1c9ee650fe35bb5053a8c3970b030b4884c5946f070be768992186c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA62112250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b8661f52b5288355e2550486ff23bf1d20de4ea82f776a4c6740ed928b3000. 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/QZDA62112251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259ecb4400b9156b75ae393373efe532c15f91ff070c78f16544e33b59d2d0d. 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/QZDA62112252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d02b0ff4cc540253518b25a4c139ef4671921dfc670a4445cc6f3689373913. 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/QZDA62112253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbc766feb6028507fc17d7944a9e5d15d0968dd6cc0afcb8f14f953b4f7c2fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62112254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14a3f143e53c4eaf21962937858a5382ee5c740476da42a2fba7918511a40a. 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/QZDA62128163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4b83b7e101b97887c58233084501f4fe2e91580480cb7dc9ccd1c6c794c5af. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA62128164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b8671540e897b29f3d6e4c9de243506bb7c361133f9c378bc15c3281ef209. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA62128165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8776ac6f2068427ebaf632f7c74011738a8b1ac418bbd14064e6d7b322df8da. 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/QZDA62128168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbafb5c6454520054707ccc41508b4a898a5ed62c53f130dc7e26fcf73756b8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:03:56Z), 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/QZDA62127773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb378cb8a541e53799a03f326461cc51123cd66017f1d1a00c5a810b2b6628ba. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:09Z), 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/QZDA62127774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b8918ca3c436608a8e5c82f907e40cd33516577610d98b524205239fe0e18. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62127775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b158f9b4b25fff51d8fc91abb0490b6192d4972e188a8a2c28b20fc6f0c4f5. 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/QZDA62127777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef0be32c0aad6b6cf20b4cd2556705abcdbb73d84efc2ac95ecabba96d96bbd. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:37Z), 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/QZDA62127778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d0e579be3db9ae43b24fb9edf8b14495bf15d1af29b42791c438fed9104ded. 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/QZDA62127779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74075bfb1833a6ed33221ab9d1fa2c2e6399ed5e193c5014142fd2955a351f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA62127780.