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 0x6c0734c413f14cd8e9c868a11c9a516b80b3f2c5e0986af78b6ae4979ab00a71. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b114cdb-3385-43cb-b104-01f977c69e54.json and https://artists.proofprofile.net/proofs/artist/1b114cdb-3385-43cb-b104-01f977c69e54.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 0x36075bdb548a34320ed313bf8d505f299dcb7f294533391bab81b0ab1d8d0400. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882217942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0014f5724911fa1a9ecbb379ce7c07970a46d8f5ae2a545a20b0bb545deafa0c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKZGC2200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1fb1d4dfaf8ea12d646db321c311f1a9e1d5e902723ca3f89c044f44b53ff9. 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/USANG2224405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a713f36d4732ad6ba6f621ad0527f9cfa4d88cf2f53abb77ee07de2b078886. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USANG2224404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ed7e40b582ed7eb61257e93903a5562d591d98aa3106c437fc114c579e4557. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:11Z), 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/USANG2224401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da05a0f6e14f2dc490943e1a1f3e41817a6a9962bbd1d093e1965632db7bd1f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:56Z), 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/QM4TX2396273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ecd1030ece2d3034d9e519150d5ef538e0a159aaa92ba20fdb13894994431. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKZGC2303507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc6ffffb42141119efe9a0e1daba0097a444e6f53fa7b55e9415f47665c2a20. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCD4N2300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cbb827b1d5cfcce8d02d178b522dced6aef4befd1d4d7089cd701a6520cb5f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKZGC2305631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ae68ad89b2891c133e89e26022d8cc9c41d86acf298a8ce6a478cde6fbba4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:48Z), 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/UKZGC2305826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026962ac8425315d0ba1c41d24b070c1e4d16897f41a50d2b46377ad53b3ace. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:27Z), 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/UKZGC2305830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07bd67aa83fed9d319991739cab001d81cd0575f61327208159fed8da4e90b. 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/UKZGC2306593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550adc6d84758de0e7eba089abff4d82fc31622c64bd9cf2d7d5b25d1f245c21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2306594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed26be057a4a3b5aa097842f49bec9aa41a217b8cbf8cd98cd02b977500f9c8d. 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/UKZGC2306597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f14e5adf11fe4f61e1a95103a0a6f822125b72d20e7328af99c08148b3390c4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UKZGC2306595.
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 0x598b36deb3812c2541873dc75f027a0d1006cf196671ecd5d8b06e428d86ed93. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKZGC2306596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e6a60e50382f180b4b04e8f18ae90f65bf2da3086900bb779b1053106a7b7f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKZGC2306598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c9ac8d6f0f828bd976d90f5cf65ce451dcfdb4df29275d441899126037ec9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/UKZGC2307337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a07cb80105584a444056e71ff9676b9ae1cb9248c289c76724d500b3a35fe. 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/QMANG2213256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb59716ea4328bd0b26dbfa723d4a5eefcaf7a57b8540f561a37726d70a54c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2436441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b797335ec686f56fe35f09930275e11de514d7dbf81a1b03c4ab488096a9722. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2426013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2446311bd9d41635689699106db790dbb4e0a44b21e86d53dd5deaefa959862. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3DF2467417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db39be3934c27b2edaa8736f5408dfc107ef8b3cd695be0d1d4c04269ebd81. 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/UKZGC2402076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0092e38c16a3c7c0aa610ed3f99008d248e74c7f0bf5ce4b5aebb707453f0. 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/UKZGC2303783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617fe3408e1f22f5c9eab1bfb96fc7ea171607b3775764ff2bc8186467a7db6b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKZGC2303784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709937fe931162d716e7a4591df4a022ba364f9377977c48067697c38157f17b. 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/UKZGC2303128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676a4e2507c68660510ac1cc9b87bf52ac78ac44361d97bf630667a51c96f6f. 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/UKZGC2303785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7561832727f731f44f965bc71d3c75e521d2a5ec9b5b077926a870bfb80ab9b9. 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/UKZGC2303129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd57931685acc455a85752a3a6bcb886b5d1c0e67dbf9191bd031ff26c7d11b. 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/UKZGC2303787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a5640d71b58266d247aca45ee7e435c053355f8d40b743564d85ae1d9c14ff. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/UKZGC2303789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6853c111fa39e136e58f4883f02f5381568ab3af2d5cbf06247bf02a86f03de. 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/UKZGC2303790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ef1c79e646516b978b51ce011375808fb089829d1cdebeda53d054cbdfd7e. 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/UKZGC2303130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631cade309be0323b416b198fc9cff92f767a63c98e9271bc622e2fb983672a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2403094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b21bd5516952f78a8fe004bf6d9daf1755564af6e8743772b5261d35f44291. 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/QMANG2235832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ed8b3f24078ec84dc8bb4c72cc62bff9d90b918cbde68ed64042d76337ac45. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/UKZGC2304704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44d303d8b8eb91c194ab75068065db776e0a272da12830f49e574f514c95926. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UKZGC2304545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40de6c02ea88b06325417d8fdd8bb1a4644bb401d50bae272ab22d6904e7f869. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/UKZGC2303127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e36e20f28b448cae6df2fdf046bd64439b69c593d0fb4bf8abfc76d6044e4. 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/UKZGC2303786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ad2a6601f0f43f34a39733537053dc057d99a31f604d8b0887f9ff18cfeb8. 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/UKZGC2303788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253921c51c35b495bf6fd869ad794de00287c8fc0990361e4b5ec5abd0c9419b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKZGC2309598.