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 0x73b2cf9a4938f32faddd88ea07e74b97190a196f5edf070354ae77b4f3aa7897. 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/b8a4163b-694e-4bbe-b7dc-a5e858fdf05d.json and https://artists.proofprofile.net/proofs/artist/b8a4163b-694e-4bbe-b7dc-a5e858fdf05d.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 0x7c8bb07d196fcd5d28988bfce4348d859dc75a52208f0f1f8a9b224c408f87d2. 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/SGB502345693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d40d5f0c67d0167e2244861d6fd701e299c96fcaca3e80e5af64cd50758111. 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/BKSAI2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76168a254a617017ad50cc90fa01adca2fe2fd46a7162d0df2b8f6fa807797d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068be005ddbdde3f1a731d336dfff4a23dada21cbc96b9dc6b88e748949735de. 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/BKSAI2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721fe2aa7f4e3d3250d98fef80fa0952541e980726c17fff807feaf1dc3fabc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ec9bb53d09322c5be4f51cd5b84e2dcad888c9fed453cf9f6c764f8288cc9. 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/BKSAI2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c07ed999dcfdce3849531ebe0e89d38bdc6f4268199d074b4203e9aec460ea. 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/BKSAI2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a099866ad3b91cf93698de1b8206713d70bd50fb90ac683c3feb23a43f64a6. 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/BKSAI2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85845b6dfc4e786963d17b536987c48769f6c1b63692925e0d0a1a4d3f50521. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddee664dd4ded853c61edcaaaa872cd8ae5b5077c6611be246ebd79bdb035adc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763e9958f0bcc6a461d8d1bfec6217f2a0498578ccdec5b8698b8c27de69b04. 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/BKSAI2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea76b35b0193416a1dcc5be47eee8933111fa819f99ec94123f1288ec7e1f6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4f923a84671c15bbadc968b89821d6740d1bf938e878439676c849b9f9f54. 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/BKSAI2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd181bb50e68b4505a5e0e4db7748facf0020524e8a2f572d5bc2305793ab461f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3385f98b8b018feda7d52ac699265abb37331f3c0438e9181846c736cf4af. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BKSAI2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e058ca409ee1237355ffe271ac870ec7b43a5e4db2613afffcc5c744925ed. 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/BKSAI2300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d260ca0372d47a61f644123c9661d1260549e1bc5cd18fd1078337657524504. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f9cb1a060674921b3e0507dd74c061b9f93710cfdb49583f62b8a85378596f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLRD52354711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5fa598a48d74ddcacaa412b77354b9f43f357f7fc30e281ec6aebda8b11b53. 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/QZMZ92341919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df30fd37c3075b714427df3edd1001f385e45b4f19b8495436b783cd687c879. 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/BKSAI2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d53a0def7740b20cf0c3040b7d2766770f606297c8ef83c995d92e641eb0801. 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/BKSAI2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f5715ffd1887a60c13bd291824f0a0ff69f2f042f8f681738efe6afe970837. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2500005.