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 0xca25ac63d0337021eabec8730aee3d44df02acb5584fee64006c494260b12ca4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aea97207-0c40-4141-8939-5612641e20be.json and https://artists.proofprofile.net/proofs/artist/aea97207-0c40-4141-8939-5612641e20be.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 0x185c3a39c8511cff7a7dc6747e73bb3e60151578ca548a5a5ed4a060a3d1b252. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX762010429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf741ccbee8ced74d6cdb8a381ff206eefe37a453ce6e3aa4d27741f46d8fabe9. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX762010431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bd196f995cdbe2efa48adaa2b417fb142a1e4dd6d9e2307a45addde00f0faf. 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/FRX762010433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290cbd01474b99b84770dfc63e91d3d4eeb32eead2d55d24ffa5f97024d85aba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762010438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe760127e1ab3bb252c7b51bfac2c69fcf201fd5271f4a06e7613caab1ac81475. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:19Z), 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/GBCG41200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22492c0daf72f6b344a7a4cc741e78c62b47fbc575daddc9b344c4c5c5358877. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITWXB2472801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f75b27881b871ef0ba5a0f03dd35b8ac9c76ebad3a953ef1018ae254d33838. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ITWXB2472802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22d0811e5e15d059c1be6b2b2737037efc30890fd25b258a187e0461818c6d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITWXB2472803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2072ac96e214753beb0592bf3be44ba2b988b5187d98c5d582230c0ba73818. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ITWXB2472806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec52d1c9ffba66411cee34f8530e6779433e602aec5a06deee2318327c49bbe. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:04Z), 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/ITWXB2472808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0038b7b913422eaa653b688dd45d673e77b432d36d1a7335bc107356166c7b97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITWXB2473102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184acc8836d0d93b7f5264020e65193d446b4b2c44ab87e493c8291934e2920a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITWXB2573121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfcddf972abbf74bf01ceeff601c6340e4e057382cbbc707e8944da5ab58407. 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/ITWXB2472833.