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 0x2a4ba245aeb698e556c8f56666ef4ad40b1c2d20153669c9e392992b1c18c9fc. 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/8590117b-da12-4d0e-9abb-dd0a5ce2184c.json and https://artists.proofprofile.net/proofs/artist/8590117b-da12-4d0e-9abb-dd0a5ce2184c.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 0xbf16037109d2ad29d578b8f813c28f207d45ffdebedc14c6b66cebc08971ad93. 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/BXQZW2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8de2929a5b5b848e8296516a7e4b81cf47737b67862d5a9a807be2eb5b808b. 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/BXA5K2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d6691e1a89ea1d3813a32b53013c50b86a9cac4f3f13f4bba238418091713. 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/BXQZW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88616929a7143c6a89c27f26c1fed0f263e5a9264e80b0c4a221670242e6c97d. 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/BXQZW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6860ca140d5e45c98ce2c3cca74bc111dc3b684e4c0e1310aa54590b65ec6. 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/BXQZW2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e1e313f9ea0fa4592a3b32288ed79c16d7104ac6ea89b3e125110bcfba2b31. 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/BXQZW2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2494ec9e16e04781243d662b0dbb177f50d118900d8d7e617c1796c317cf221. 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/BXQZW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d456f9d9c253469859f141479dbb4787c9b6b07d66c3cf9995b8b473c1589a. 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/BXQZW2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09b51b50a51030775030bbd52c1017f2a5648104cba374d84629253b9bb91b. 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/BXQZW2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca68e2f768e47c295e649c4287fff64978fdcdf0b3a1b9163367c4d7512998. 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/BXQZW2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa13e5abc2d00bb73d8238a93234fb629f2ffaccd7e0b7a19a1c266711ccc58. 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/BXQZW2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a54a7d608fad4afce950a6d9c956e79761b4987fed7e621d7eb60a056b555b. 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/BXQZW2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda48baf352effd5ee226b57e0000b2a372e4b8b591a14aa8970d008d50dc92b9. 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/BXQZW2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fae24684c1464bcad48457a7c79862e05389420e2833e1bd61cd483ce1cf73. 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/BXQZW2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955311879b065fa3c751142c35237b07270796ea50dede5f0ce9846683c4fbca. 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/BXQZW2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee15c7df6f8beeaccb8e89d50e32db38fb93ccc78bde38b2dcca3948ddd645f. 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/BXQZW2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0282d482901cfc2cfedf3d15a6adb03d49995fb4ca73b43e287d1ac98a0bb1. 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/BXQZW2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a79fc6f9586311c97267df1f1799ff0a6685733438c36c2909650e34703de5. 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/QZNJX2247554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf992ea6a6de8458b316269c4a39420882b36d75e40c69dd82483c1e88f7a2fdf. 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/BR9OU2400005.