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 0xb0ab92bbd60f815c2206e89172a5647e3497bc0ee0eeb8d0106ae1e7e40bb130. 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/9c6afd82-dc58-411d-b8a1-c63528f3dc22.json and https://artists.proofprofile.net/proofs/artist/9c6afd82-dc58-411d-b8a1-c63528f3dc22.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 0x5b7745d24ab22a3b54d7f87d30031cac6b936571d70f8bb2cb1b60df5db087d5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZ2L62100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867b7208f7b08a1fa1b50561bf5c172ca7a96bbe379a481cb5eedb6e9c328582. 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/QZ2L62000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed2189fbb01a90574a46d4028f577f8843e6a13aa15bfc3d53e86cd788f911. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ2L62000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d40687ae8bfbbd544a5a171cb82962e5d9114bcd792234da66bab55fa7fd02b. 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/QZ2L62100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566e10eb54147029bc4b2311a3186d0422359d59c8a457474c329b2c3e413ca. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZ2L62100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94762c81085a728a42272aab1d44379e437bedb1812630c4a5aa0a188a193716. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZ2L62100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c9ca15ce89a27f53d30567d1595e49e7dbcb0a19c9eb7fb6e72c68e73e76a9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZ2L62100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8dd14a5e49dec0c1503956357d8c526039ae7008bdccef7257fc7e9dff53b4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZ2L62100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e7f8ed1c1336d8dfe7469792cf49779aaf94a82dbbf76c850b272e61b2296a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ2L62100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17331e2ea6780e347044a7015fea0291fa99d01e30b8736857553beba9c5e085. 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/QZ2L62100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2a3429cf1d6e3803537d82bb665126fef5378857712f703e54b5cb8b6afff6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ2L62100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54006f13dc6932548643e11c1ea6f609474d65031c9e706e0489ed0f088b7318. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ2L62100053.