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 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 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 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 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 0xb2219b575de69fa0af2c293a2832b50fbeb62be2da57e527e9465d208129754d. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/USANG2224402.
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 958134 (2026-07-15T09:14:08Z), 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/QM4TX2396273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3ecd1030ece2d3034d9e519150d5ef538e0a159aaa92ba20fdb13894994431. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/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 956772 (2026-07-05T10:01:46Z), 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/UKZGC2305631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adda53a61242677660bc931505b9fd4da64ba2e7f32e3d5909f1fe50908410c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UKZGC2303794.
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 958850 (2026-07-20T08:32:30Z), 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 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/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 0x221c9ac8d6f0f828bd976d90f5cf65ce451dcfdb4df29275d441899126037ec9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKZGC2307337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a07cb80105584a444056e71ff9676b9ae1cb9248c289c76724d500b3a35fe. 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/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 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/QZPEW2426013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2446311bd9d41635689699106db790dbb4e0a44b21e86d53dd5deaefa959862. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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 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/UKZGC2402076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0092e38c16a3c7c0aa610ed3f99008d248e74c7f0bf5ce4b5aebb707453f0. 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/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 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/UKZGC2303128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676a4e2507c68660510ac1cc9b87bf52ac78ac44361d97bf630667a51c96f6f. 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/UKZGC2303785.
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.