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 0x91e3476af680eb034b4fbd4a285971593f4047dd7469d8f900e1450943d72107. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d5c5322-46e2-4f8b-802a-af5c8b933a31.json and https://artists.proofprofile.net/proofs/artist/7d5c5322-46e2-4f8b-802a-af5c8b933a31.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 0x3511c412bd8e231b44380ef64063aba56fccb7cb0e8163013508e974238f04e3. 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/TCAGQ2228626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f9f44a63c75fc82f9dd05b6499fa98a27311bb392ef32e9254a87d807cf94e. 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/QZZ8A2438170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3caf8e77e2ca258e045de6ca56689c2436bcdf072ab1a372e7d2d59cc22eaf. 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/QM6P41813143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807711e46f5dd4eca63fbc5cf15e96d87718e6f82c9ab4a8a31ef03230c654de. 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/QM4TW1680343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13f8d8d4eeadcf4c47a364903576ddd4469ad67fef90dec517aa7850efc5f2. 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/QM4TW1680349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa031705961bc64171a7d0b6ba9bf9a110f7e311fa94866362478beac587ed8a9. 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/QM4TW1680354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b412c355bde6c8492aa5b2664f2c9869ec4c87d7a57b0d15c3468c1233d3855. 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/QZTAT2100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64de509a4fe23a628eadc775e7ac0785c85769cef30b7fb84947741e4a289844. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLS2147411.
2 pajaros 1 tiro (RIP Jamby & El Dominio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f46ffb0fdf206cebd074564dc12c0d8c20c3c578aff01ed43d407ecb39c6eb. 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/QZHZ42017834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc57f5ede33dbe40b8bdf646855acb3ac454792c50e7c75310925c80f20e0f2. 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/USDY42525282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4187fb2a079530e964c1243622f262119dba2f81c2972f04ddf9132829afd830. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES71G2036003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092058311f96d9238b44ba7de7e3d8415bb1df002c000230b36fad082d6dfbaa. 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/USLZJ1901536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd615de848490efdabb7ee327b7fecdf8a0f0479e7b5d70e8b32c318131f4254. 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/USLZJ1901515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5b21c1558f0e58a8bcdf5efbceb856d71b6ea3242844e900113b9d7d69b38. 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/USDXS1704019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d1b5badaedd2f71a631ab1f9bb752fff464e46f9070481917f992d54a66f3a. 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/TCACO1634082.