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 0x53212870274a01734fb583875f06a86cdbaef9cbea9feb8d5727a4376401b394. 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/ed213cae-af93-4564-ba18-c591b56b60b4.json and https://artists.proofprofile.net/proofs/artist/ed213cae-af93-4564-ba18-c591b56b60b4.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 0x595910890986fcc64237104de710a042d9a6e3800076db0b4a20906b51fd6b5c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ9BF1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39557bef0fffdb5ae24ed672779b747c4581e7290662764fd15660fdc419452. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ9BF1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc2e426da0cd47cccff1befbbf0a69d0c9b3756939629532a3aec9028ed191. 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/QZ9BF1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f39eea77f2810feba08ce6d706ad76223977561d205493f70e57724eeb25f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USDXS2001466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bde96a07e978584d5706999bd4a9acb29d03d30906cb18e9007586d8965d2e2. 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/US3DF1625787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf03c12241855ec302516b5f492d30cffab78e36402639ad92a693af3ba749c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/US3DF1631179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39759d5a48b0d69064c48448a7e61b07725bdcb1d5b4901cd3cdc55bc3233248. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZGLS2321405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa3d6e3fb97c78d215303b975a28ff73c0b388411cbc0c38a2b0468633130c3. 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/QZGLS2321406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b71b0c3fa07fa6e87daaba4f3caa70667cd785457e087b359bbab95f668df1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZGLS2321408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915a74a449a59736755aad018690e53024a9eb65515af51082f5be7adf573d0. 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/QZGLS2321410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f024c107bb111cea21f5ea6d4df8de41fd4cce20a30e04f8ae8ff6b9a6e2722. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS2321414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d3ef01825ef15ad05122057403e5d41a95849db9581656107b77d89bfba079. 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/QZGLS2321415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5375f70a72c00bec0415e3dd797ffdb362e34703717259015af2db1cb94ddd3. 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/QZDQH2411992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff93d7a3b2bd18c8335eb7ec44a401f11cbeaed64580d90a15d94be8371511c. 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/QZDQH2415105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80792e931972930dc2f128766f7b12ea4a9c1a2b671d4087bbe2c057621d14c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2416462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd19fc946031934d26c84fe1f339de8824a020a593a5f65bbce3e8cc709a16b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDQH2419494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c7285a31bd619773bfed2445a2fc947f5f384c8a897e1ca62ebdd5b084dec. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDQH2419492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baacd8043f9a67a7445f79eadda7f45e75c1105b9cba44dc13c7084bfe03411. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZDQH2423521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31754d7c045c3170eafb769b969ab265471d8cc17d68d7c3289f351a446d77e. 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/QZDQH2424749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810c5fa228b9c4e62cbdfa6d2d7a0ad8d644c864b432c713ce8a3b0cc102143. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2427560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bc39dab820377536384782e86082b9598f22c67d31cf2a5434a13637d7b050. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZDQH2431247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5a85d99c6db94f106bde78a523f44c0ea61dcda9f985e861e95464abdb3f4. 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/QZDQH2436723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8684f1123675b2ee152d82182afdc5bba168e996cf41f3f9904603575de110. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZDQH2442046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675bbc9fcb7b2599f6f2ed91d2402c83a16d207aff05ff5153302b932bf49ec6. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZDQH2442047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f0505926c6d891c47545bf95dbfea3c5faa79d0fea34c48293fadfc85031d1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDQH2442048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db34376234a0d3c63e1b38651077efc862840229432f68cb5ace80da0728547. 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/QZDQH2442049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962915f2ffce97ecb6338b020b6c554177adebc3ac119bea5d41cdc74435c373. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZDQH2442050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678faaf20486ce5259ca0882af176433d4516e5587d1f7cf6d4cd7616a1d1ce4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZDQH2442051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1c3f258fae2aed3159dd1272213160b55844bb666d96ad3ac6a596940ed2a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZDQH2442053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6a468bc1630af91176005e1e31274f90a58a0a423b48b492702a311a8d127c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDQH2442055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73b4c03e1c2a0c56721e38d3d0127e3542df6dd6b3bcf62498b0f5bde434073. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZDQH2442056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154cf46ceba283c9e2b083db409e5d4b024ecf78eb59acbd647227f4f09a25ce. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDQH2442057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3912a490f890ebb001f3435233a239e8156411735efa0b062d19486bb4939. 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/QZDQH2508747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f467a25994a9baafd395eb891e42be6d975358b1eacd15cdb8a9ea93b02a3c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDQH2512835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801562c8fede6cb7bbfa78d8c65639d6e2cfe6b5bd459e856c6a361df75ba494. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2517155.