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 0x02d104b54f01bcb54067b76ab026009944f762efdb1ed4cc2475ad897d8b0604. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/618949ea-017b-44bf-a6fa-2df327050507.json and https://artists.proofprofile.net/proofs/artist/618949ea-017b-44bf-a6fa-2df327050507.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 0xd898a2486a4063c36c570f0513cdf3faaa5667224d79af73bc8e9471c691c7b7. 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/QM4TW2470167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b45fc7055b23654bcc0d39ebf793669bfd1c286840e2e2f1b136a4e3fd507d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM4TW2505306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77e4c636e0dcdf6be461fb3a4594eb86c727d14706116b18ec92bf226544e88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6N22356003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458a3230bfc70c3e0506e9612afc8a7d1950f5cb5272f33b428ee373c4928287. 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/QM6N22356005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82b9c04968424bb0456b9778d4c724b31a9e27bd2336526e45c33c3589719ea. 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/QM6N22356006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fd87ebfa0f119de519e41202d20d2f7d47d0e61a8c91dcbef30f5296b047e6. 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/QM6N22356007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b49191b625fe3ff693b6ef92d99c26652aaa2c2d56b8b2b289e8adb6776cefb. 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/QM6N22356010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0864707f72c4bf0cb2b45ea5891a5835a1919684bebb76d346c6df67cb4c49. 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/QM6N22356012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237ef68b87f8568e55a48ce19706e98b5bbe2577264bb9ceaceb6e865b74e5ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX2392727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a41d1dd579cc8a3d769cb109b8ed840fb3f6348fedff412bf5299078d0a0ae. 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/QZNWW2170286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf05ed6764a2140c4ebeadec75c4be70a077f6fa756479ba1cd6d057e4ba82e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWW2170292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6cbfe2f521cd1876043ae7ef0e58f0654208f97a97cfb80059749bca039305. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWW2170294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5cacec881cf097af1c271329d4c39708996309606d44b6e0d3ea4623974d0e. 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/QMDA72267626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce108475dd87270674fab36c1ad09ba5c770171240b5fb5fe3044093a219fe1. 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/QM7282393400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f065a31e718749692ac9925680b90b99a6d611320bafb906288eaf724bda3d9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6N22356009.
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 0x67253367a4a9d5d9b9e0ee9b1039cf731141e8c3472171977d56ff8efa75bae6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM6N22356004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a33e9b53facbb4a9b5070f3367e075b07cd5dd87304eab00d3659ed6fb2e5c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM6N22356008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf828dbf019e89d18f03731daec3aac57bd630db047235d5c3ea53b97cc4b3d3c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM6N22356011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb782b2698f432869fc429779a8bb8cfcee00ff86203b19dcfd9c689762c8c600. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM4TX2353314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa34a42a6f2ae49b170dbd95bafdb5e35cf7bb9c12531d9640ed8e292ccf670a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMBZ92355610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8579eb931337a09252f9451eefb3ba46b9e3200bbe583b1c33475e6ae0ed9fe. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QMDA72267743.