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 0xaf4cd1b64bba42bb2bd28ec29bfa26c5b342be3079dd60096140a299af10f8f7. 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/cab73ed4-9b86-4edf-be74-8ea9b5aaebff.json and https://artists.proofprofile.net/proofs/artist/cab73ed4-9b86-4edf-be74-8ea9b5aaebff.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 0x9791bb70fcb2feee7d137fc7fb9282c9f45080d96815ca2a2ba45d1b5f36764b. 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/QZMZ92459568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc5f3568207ab9729d45dd357fb4ac2f49c0361da674d2d836a124990588b8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZMZ92499059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d81622535312d53eb9bece641f5af1a9d08fc2d62faff4167a02b1bf4c90f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:51:08Z), 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/QZMZ92499065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b16c8f1c17a8e3c116cf6f11bf680dbdcd4f41a3635ee487cdf42d7ebb983. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMZ92499060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b8914a918646b28ac9e20623b932ef34c5fa04d5fc5e14598ed7bde9599cf. 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/QZMZ92499064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0ae4e9deec1023f3f5f230b1db6fc2c11480fa369f65b0330f563d55c82379. 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/SE5BU2573369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa549f95237303acf709c5b1d643a33c8df763b1f8e81c1992a655212ace564. 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/SE5BU2573371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849b786bc728c10b3ba80891253964687b3b2fa4ceb4320fff95d2c3a3419404. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6SA2475645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a0f36a2d2b62e1cade8738fe06c8262740b90fce9bd5d731f3ac0619070d8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BU2573367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e35a7832b0fe92d51e3098bc76daa53c57a7df71af93b3ac14eea3930c1207. 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/SE5BU2573373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f64ea015744fe751535bbe49274dcb9da3cdf615e67a97c5ef774d3a8cd563. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QMFMF2330572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d91c3e6c1860f7e2db7eeae681e3f3c872fd7f7cb6822aa7b7afef836ee1cf3. 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/QMFMF2330567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84f3d13135094c5cc3633a4d4a5d2ef60acfd2ee23495f8f7b7fd51a3a067ca. 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/US7VG2480468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092618697a9fa147ea43746bc781b68ed6a12583da3d19ce9003cc8813fdb9fd. 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/QM7282494897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401b47f64ac6cb6737794cf8b4a789b733f2507b475d025e3dc3a176accc28f7. 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/QZGLM2446634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417989ca36619f331430d70c9f21bb2bbaabab9ebfaeee3266f440822849ff4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLM2435761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f9936d4fc7c9810525d69e1e952eabcbd31c9ddedfaa7c9f64822c3ac82de9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMFMF2330571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d72cacac8b7c2776edf5f77af5bc13e0b6b70460b11445ec05a0512e196a9. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZGLS2451997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449ffa8235048a74e38779cf8318c2b930ca291566cd1df628ce3ba3c26a3f2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA72332060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d33794351675358303bbecaea1148bfed1f1013794f79a2279cae5d9e63a5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMDA72357650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8e22c7aae99926bf40c21cd98ea742961721ed1abb5903aca52e6ed8fb1a33. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM7282494907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e8e72268926423be3edc05d0af3150046785d286b2f61f7e956b3e97e1a0c. 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/QZGLM2446637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb170c8cb2c7dc93c2cf3766aa75bf1df414677b8b327f790a4aa43c9394df5d5. 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/QZGLM2446638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b021f01ac170a1e444377e4e2d0515d1f5f93c25a79d2d3a31a0d032dc8102f. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZGLM2446641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf318b4cbd8f281de9d9ece204ec822ff9aea1c349121a89df5eb86fb1c4d3a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZGLM2446642.