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 0x4e99fe9c2d29bf4d1daf6f6db757396a63c51cf4a5a1558fc4ca6f1eb02880f9. 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/f77823ca-d001-4fe4-a566-fa08795723e2.json and https://artists.proofprofile.net/proofs/artist/f77823ca-d001-4fe4-a566-fa08795723e2.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 0xb7ad7a612516dde1ade860275f17cc5692ac302321e7471deddb255eee440e89. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:13:59Z), 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/US3DF2493559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e01044d613e69c9c6d0213a53abbd68357219048d594434dfe269cc4607dc. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:00Z), 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/USANG2429388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1c969a1cc4e529bd0c436e59af1be380399aa8795fc919593a4761f0186a5. 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/USANG2441444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f4b74015b624cbd9ea17b61e0bf6b10458716ce3210ff2ac7302d6ac09d82. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2482212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26999d20ba4f184ce939b5a3dd7f6d90766fda8e00db8eacd85a72829d334418. 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/USANG2488315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca52b73fa4fb6c09d6ebe001f30d092b51dd08161b3b56f074894fdb91d469b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USANG2485525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c40e7c9a7a5990fb697d572325aad18cea7cb49bf234459815875f09106a78. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:08:04Z), 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/QZZ782415989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da1eee57e3da743638825c512f68d05acd6cb43602ca71e3382a64fab70f91. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:16:33Z), 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/US3DF2504599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b55b3a67ae0a0089bf1fe6e09ac6a4d0fd46763d8fd3a7ab86a0669164f86. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2527289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e71b523b97b22945cc49afe68f9ebd9340c19bd3eafeb52c5eed55769315aea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2589660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad7a612516dde1ade860275f17cc5692ac302321e7471deddb255eee440e89. 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/US3DF2493559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6234b0b60797966778c2be4b568b9c84ec712d146acbb9214c879e718bb112. 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/US3DF2469841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c976721f1fdf19adf4187708026986fd510cfd3b704595123eb9b7865057f42. 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/GBMA22456995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff862b3b72836b9ad8d06621ce77d5d2c15adfff0db7a7e42f7cc8105dfc02. 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/US3DF2474295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318901e587411b9fcb601765a4792a40a13ea76635eb602b6f7057d2ab05285d. 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/USANG2430257.