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 0x493b0cc08243a113e736b9e2114c634dfd0f5a4415b1f8971b0151ad37aec5c9. 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/b9b3d5fa-36da-41ba-a514-c2f0b95a66a6.json and https://artists.proofprofile.net/proofs/artist/b9b3d5fa-36da-41ba-a514-c2f0b95a66a6.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 0x92579de6d740ac40be4e75a3cda71b7ce3e2d53cb69efbe3d381f92cb008eafa. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA2P1858525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62e9583326a0a4f511bf9c3c9e75c0ab7076db5fa865e7f8f952d9f91a59627. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:12Z), 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/USA2P1858526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86452c3bbb4a40d57ce849269d1edbab9f230c3c2b4151440852bf7014130e3d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P1867415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb0c259ac4f4603051bf9627e70eae0dc4ca23462c7cac5ed9792c7e20c83a. 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/USA2P1867278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105cf46752149c6d0e28faa2f7d62babae60ff835ff14cf3465dbb11cd59d98e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P1874797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcf8f5df52236a9b2f72a49e1c5c3be7efa2daa53ad547d8cc671ed4c47a5f4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBEWA2404430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6c00a11cb721f02f31cd98824c09ccbb04c5b505662e73a7a22ab56926709. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:22:00Z), 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/GBEWA2404431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e460201dc7d5a4a63c7cc49f0bba8878abe046c81654e283f8b62bd07b2277. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBEWA2404432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c662c76d93cdc1570a9c49a30ad2465994dd7f29704a03d926c06b5de27ce. 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/QZZ8A2502809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb734268dd096b83fb72552215a1c5a389b05dec7ab34159dea5b11543f0ba8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2259678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd87e73ff1f3ac3ebaf5d860a5d1cd102d54bac72011794e325ee06d8b0717c. 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/QZWDD2252909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb734268dd096b83fb72552215a1c5a389b05dec7ab34159dea5b11543f0ba8. 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/GBRKQ2259678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfdfd0a1f93206f05728814d4af4e936d6ef21919782cbd3b33c529b6bf9ae5. 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/USA2P2027070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb734268dd096b83fb72552215a1c5a389b05dec7ab34159dea5b11543f0ba8. 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/GBRKQ2259678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0186541aa46deaa7a445b6322fae3d39b0f881d75ebf7624a49914b63567b57. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCABX1482905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523562e3f936850c811db855053d24a985b99c820f25b9100a43342725a5fc07. 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/GBEWA2406169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae86b6df02385088af50971118e898a4c4340ef12fae486ca0c8b207d2eeea. 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/GBEWA2405700.
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 0x21105ac495e5719a4b4fde490c9efe650e2386d154e5eb7b83d0bb8b1bc01667. 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/USX9P1352455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a96b3c35c57ba2bc913465e7170889ed118c8d9a7abf30b71ac14ccce6295b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBEWA2405052.