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 0xebd65a426755bc2316ea4195e492b2830f93bbe8aa0936e5132cd55a84044bba. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc9bfe9f-90c6-4c60-9eb4-9f4aee1721e5.json and https://artists.proofprofile.net/proofs/artist/dc9bfe9f-90c6-4c60-9eb4-9f4aee1721e5.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 0xeaf65924a18b1694345e591a0320aa01ee72d366df6ecd163a6381d13d8d5975. 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/SEUHA2200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6fcb598bf0709f28fa46a2bdbdefb034ab927e4bc4e8cd78a2181f776c9a14. 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/SEUHA2200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e330b50e98c7139db2af7d4ea507a940cbeee7cfaa4d9d1ed49896cdb8ba67. 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/SEUHA2200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef225abcaff7a7cb92754d1ea8a364ffff879b19a08f21c0d0dbb7798be5646. 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/SEUHA2200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947e16e515c8026578e90fee48a1ae04306ca2ff42fe2ddf7e92fe44b001a05d. 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/SEUHA2200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa28a0001e417d2432f81631df5b9ed68df439b76e33c28b336702ca707238d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SEUHA2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae3776c790512dd937fa8229a4230a4748235153d91c6eaabca7278e0da6cae. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:30Z), 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/SEUHA2200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed003eecd814e51e648bfbdb3961a21c247e52c90127b42ab9be0d08e4206aed. 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/FIMBX1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a74d03f8f0477123fd71ec726f0f7b0689880b0b0d3b16357b0a6d3cfa28a88. 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/SE39U1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde17bc3ff54d3e082963c70e5a12a29367a74d0501d248ea389ed05b6eebd279. 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/SE39U1500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666f753aa09d2a6d7a813fcbaf04fa41fa88485ce4dcf427e8e6a25d66bfd89. 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/FIMBX1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7ec2a13d28d6585b788c497a9e0639bd92f7d5950220444fd9f4654881040. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIMBX1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947e16e515c8026578e90fee48a1ae04306ca2ff42fe2ddf7e92fe44b001a05d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEUHA2200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a195f7d30c30f4d13d2932f54edc8109adfaf4e36db242d7845d7a1354d73b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5751910568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11b9801b8f4f42ec5f9558f6911e5a00e12730e61fd2a69543aae467a83db5. 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/FIMBX1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a74d03f8f0477123fd71ec726f0f7b0689880b0b0d3b16357b0a6d3cfa28a88. 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/SE39U1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde17bc3ff54d3e082963c70e5a12a29367a74d0501d248ea389ed05b6eebd279. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE39U1500101.