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 0x04b54b71f39c530bbdfe1104f4a93fd892690fdc79d287b6e22cb74aebca8b73. 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/6e3d4da0-5a0d-41dd-87e9-2db427ef8108.json and https://artists.proofprofile.net/proofs/artist/6e3d4da0-5a0d-41dd-87e9-2db427ef8108.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 0x2931fd94fc62fd6fe0c1dfb7ccdb9ebbf487f4c8e28d261d4bff3d564930338f. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/MYIT11600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3a21b6a29bc92d19b50c395de9fdea6ed54e3ca83b6d7276ae5208e1dcc032. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/MYIT11500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1279bead5842de2f8fa43b97968d4eacef8d82c669733e03180dd6ce47afc70d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE5XG2502077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7456b22b6b85373bb1e2d3a6394f8f4fa8334bbed7a0885df782d0cdd856f5. 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/SE5XG2502079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e0d6814dd9361bc7bc0be97e4d72c110c9d06da48e30a3442a583b991291e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5XG2502080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4186f2970ef7ef38b784eb7e17368ab9ae7a9f1ae2483da7702a75e6fe38ca53. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5XG2502081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6c918b08be82d92172819d64a4283dbfbd3fd88606d8e4949523c1cb273a9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:34Z), 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/SE5XG2502083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced0fef0add17aafad5e932fce6f758f3d2ed00b8d2fbc5b222e32c5a4b5a57. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5XG2502085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e970b803615a5aafce4f3ae5d23baf7e3d78d547cd299bbe32a2d037c65cf0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5XG2508909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff935cac75a4ef91cb96e5efaa30ab77ba733167b288261c7f2c033d7efdd057. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYIT11500058.