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 0x83273c2092261fdd08f8ec527fffeb8ca080c9eb36e3be54905a53b4019e5bbd. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cad24adc-88ce-41ff-8fcc-d885308e71d7.json and https://artists.proofprofile.net/proofs/artist/cad24adc-88ce-41ff-8fcc-d885308e71d7.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 0x214c5b5144250b39a7170e3949ec1ae5e84d1d42d37e711642f196d07e32ca9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHK2360040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd8d96aab9883e75c58619121e5d68955d1447981261f255c045a920c081cbf. 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/QZMHP2341514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2536b0bb7c317a5dd38479762931df1bb332eedb81ac547646b4bcf7a999c94. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHL2316057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524f1ef83a9b338749e62975963aa62099a82dbf3e5d74bfa15c652a24a6c0e. 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/QZS652331710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a420e7099b19a241b474750ef7fbbaa1055cbed7b2a728510bf2f2493339c20. 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/QZMHL2363163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f9db4d692ed64ba47b6d2b4bbbb26dc6ab3947120a1764f4f091cb806dccac. 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/QZS632331990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b4899b720bd4b49aadde56f018c29bdf575ddd6326ea405c3ea63d05841915. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde85adb3b15193a4cf0010e3c597f861d760aa00ad84ae786f5e86a49f269a42. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZS632313821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd130ba165ae8e2ab9a707b1bf30442032c0c02ba10e895f910589d432fd5ed2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMHN2368975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445034bb3eb1721d9df78f2c7123f94dd5625c15a538b4705d37812ccc5498fa. 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/QZS652328151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141fcdef208477d27634f9c228395874a7644f96332eb47d7b012bf82e264e30. 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/QZS642399706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2edb29c790d847204563b63b230d00c66c1e918489b05a24f8699b4b65f91d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZS632346873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bb6a6cc03be073a01ec7dc4ce02c282fa0283abab92d07802e6f0c1b52d384. 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/QM42K2338080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bf14e9de5d6390fdb1db3ce881cf8f21efd67056b897308ecddf79412073d8. 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/QZMHP2307791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c696c86cd5465e214ca01ff7c6545ef45398d8c26a296cacd118c6d5e696850. 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/QZMHM2379327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84082102eb3674a8d457143dab995f4704ded0a3e97a89338556fc23757c933c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZS642359774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e5d1fb441dd5289ff19c900bf05e1f16564377e5bc37c9c23e0bcb10603b1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZS642328458.
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 0x4d68488968cf015b3d6cee6014248f17d221974ad536d1ceb99521e2cbcead66. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMHK2307135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a3da36e539c895646c974e856ceb457569efdad78f6b3e757354d63458317c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:34:45Z), 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/QZMHN2315677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48b16dad57756f1d44e018c179ab5e00931a6aacaccbfb6a2726dd34442ddde. 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/QZMHM2378580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5a304e78df4c7a819d2626f1f825297c64f8d776413d418d61d028e7404fba. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QM42K2321894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f5567167ed960a09040ad9dd9663333c0f86cb3e1256b95bd63c705567e106. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMHM2363330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8530ab2e9db9fcbb216e1f0e7ba4fb574ed09e2d2dd3b482088e6f4563bfc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZS642346197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d114c0b1e67b7519ac55c6bc62e9d7481aa310bfb1a0046b83f2d4993eddcd. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZS652396866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e47793c586a1002b46bc72a1ec21b61dcfef758c67dd3382d7f3a1af547a90. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM42K2343229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24367168281dcf35b3d36538c5da0b483abd1393a455d42345e0089195443d78. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZMHK2319809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04acde06f3339f2d25a6f39f165f640b06492e3fca44e76d69939b88fbb47c85. 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/QZMHL2327938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5b073d98594aca51aab9c1621e99ee0c881440bc86f60d0959a04a7db4b6d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZMHP2382363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bff2addb1fde5717bccbbfb4ba36499260775c1c97085d7e0f8e760ba311244. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMHK2308651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a1816d2756bf4f4874e18eac6ef44ced62ce6ffba2543b927e3172ea95a01. 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/QZS632308616.