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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4be640574ad439b3d0c95f793e96f8d97d60c66f1f6fa93e4f572533673461. 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/0c6009cf-9b4e-4cb6-a8a6-36e466977732.json and https://artists.proofprofile.net/proofs/artist/0c6009cf-9b4e-4cb6-a8a6-36e466977732.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb004f06c35681e614a5bff97f44739476ed84baa6eb158737e13b488c9329434. 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/IDAB30608742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bdffedca627d0def4204d6c7d9a76fdf8555d15c6ce1669df231937c81b428. 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/IDAB30608743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a9ea9b8441631ce1dd8908226a6b9c2592cc102911ad4c3c3ecb4c12f5aab. 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/IDAB30608744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274156bcdaaeed44cc1f8da0770433e2b689d96609035550ceec582a9ef7bc2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IDAB30608745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda2fa749c114a85e0a0fd04107c10bf7af96c101fc4d5a34d857f6b11393e0f. 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/IDAB30608746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c03629e90506fd54eea9451272a009dba965507ea1516f5cd7323686c42092. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDAB30608748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa310112e6b66acc0c586d58b868cdec4acf47bde32aefbcd4c63b3df7cd39829. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IDAB30608749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03d8b6a10dbe26d74e6645b44d94d5e1fbbbd449cb250079578e888b07d2c87. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDAB30608752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9934f6b3866884ffe9ffb17df69ca2306fc7322d95054857ce17568492fd92. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/IDAB30608754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697271e78376653be593c43de3eff8f4d12db963ed810deefbc7ec00161a3a5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/IDAB30608755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017d5a58f1e1fac8f8cc6314b61a6b4d1a50b66e65666a14d6e9891346fee223. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/IDA401400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce926eff52cf87d07be4da4741ea560b937e6919852a797f89bdf29c200a84f6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA401400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ee08e3f9995548066e3d76054e512d2036ba4c102c3d07b6b7da887fc58c7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/IDA401400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67182cee076a11e602e02b206207ab25dc406bf2f743e56e450eafbf8e74dc2. 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/IDA401400861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c4f2d86e29631c20f1a75641fbff6c5062e3d99d6c44c22eaf53b43912022f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDA401400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe057726c3ba12ed2b93fd7cef93733bf63a75622c062dca9bab25ebad14d1b66. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/IDA401401925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0e160345ded2a98c155ab8b22cc0d7b9acf52f5d0bd6eda62da0fd2203622. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA401401926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b092d6970f6a5653a1ac4df87d9fb12d008e379195ff0152e6ccb7af89c4e1. 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/IDA401401927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274156bcdaaeed44cc1f8da0770433e2b689d96609035550ceec582a9ef7bc2. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IDAB30608745.