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 0x48cb61e98e45b97de3f11a52a39b9303767f9f19ac7b793204da60664abac73b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/592cb03c-6189-4c89-9b1d-4272255c44a4.json and https://artists.proofprofile.net/proofs/artist/592cb03c-6189-4c89-9b1d-4272255c44a4.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 0x185b33384e642e6179caf33999a99f64bf132fb9b9e7c3c140e820468d75fb23. 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/TCAEB1974974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb152798376438de42de0d53878e59af2fe6677d3bb62608ead16f67a62adc629. 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/QZANL1764954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da46e0b560bbb27b5400f3fceb0c2651a6d4843c3c044bc066346c60c68f4fd. 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/QZANL1760128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcef7460963c391daed73bbfc2b8bc169281f7274dbd43557bd4aa2c3bb6979. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QM42K1705292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336f2e32b157b5310c195dbcc5a035251edd86f2057e53595c84ebfc0cac156. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:56Z), 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/UST8K1728171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aa38bbe108d52a3421b55e47a2c65885b029a2f03913af5e25f46473b5d3fa. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZ9Y21718976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645d5b7b1cf5d8a894939f4b6a6a97e4b5d03b1d896b7275f414e505c652269. 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/QZ9JZ1727607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f573009ebccad15df5669d8135d90a61b0cd1288a0f62500f08ab8d7f27b5a. 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/QZ4JJ1715667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb61e14670693f27651d6e5eff81ac4d719d7f922dba16bb5bb84d0a7402022. 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/QM42K1705226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80235f4240f33500db0414a4ae215955c5b5a6dfcc684c1cd2fc1c9cb48cf9f7. 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/GBKPL1826724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46559d0a42ee181a71dcbad2a70bc0d042a732a2bc98f43a0dcdb81e2eee4cb8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBKPL1832963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908ce33517ec7736395fb594f1cb2052013f30d0b85e5a734e4252f36bdb982. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBKPL1832965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cca344751f77b78d8728e54e09c8e41573f5633486bc1a3e8e37761ab0b155c. 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/USRC11901967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd00f611cf9a186c7e6770c5173b21f3d0a80bc3fb28d1240045c00fb00b8d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:25Z), 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/USRC11903468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee07469b5b8967a24d0677a78b92cad788382a6ef004274066ea105f36989463. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USRC11903714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ff4ac012244c52157f7f157bfe3af722ff7cf0d89c3bd1f20bfd7ea6f024e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:59Z), 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/USRC12001670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198b827523eb0068a5f26007a35079057fac1a0fc7498b069bed7b8ac6efce35. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USRC12002092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2304ebb6c9ff2f93b48642820b6d5b8ea9e8abb0dd3b302298a85e61130a60. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USRC12003172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4a4b9097d85040f6e47db9a1c1e2178ccc2b8bab45f4d92ef8549f7663895. 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/USEP42207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f765515c7e3df36978db96a58b9fc458f419bab30f9a218e0841761bc3d278. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:03:22Z), 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/USEP42207003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee0f8d11b4e44000252129316a12acaa5ee3889919959ea59f4bf3d3a8b13d2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USEP42207004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878acc14dd39aed00c51a037e645c2f9651a9ec213e29d98a8ce76b41c0da0e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USEP42207007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4a4b9097d85040f6e47db9a1c1e2178ccc2b8bab45f4d92ef8549f7663895. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:27Z), 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/USEP42207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878acc14dd39aed00c51a037e645c2f9651a9ec213e29d98a8ce76b41c0da0e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USEP42207007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c3ae3f514379e4a9f1d62b1743869e486159c1be2af1d7128107032f1080d2. 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/USEP42207008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616db52aa8ea87d58ab2484acf07672900661e990caa2c6a9a7f254f6a8dcd35. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:27Z), 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/USEP42207009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d22761a1cf4586b7044a22ba0e0b7e5c20e705faa4f76e28b11de44803043aa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USEP42207011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea2d2e94ada33f5d24dcb5679332fd85353ef05dc7a3ab674e710db7cb41234. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USEP42207014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69268de551f3ba9b51614907f39b435be00cf808e364ecce5223f4a506315a21. 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/USEP42207015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877d7cee2fe1148871a70bec4b47b97e35ae4ebedc17c47ef1968a9ed3cac1c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USEP42207018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4b399170a58b4323d7145883d91cb4bf94a3a1c54c355b50972c51da8ca16. 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/USEP42207019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffcec68d7d0d5b9aa6df4fe431197ee8ac5b709e2da1655e1cfc0033534a6f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:55:13Z), 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/USEP42350003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf797d38965f8fc51bb1669fca4ef93e4c6cdca2c686503f2df2d38d854205254. 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/USEP42350004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06aee8f01b070621c5377c377dea3804b3a5b95c03f1aecf0edf7b99a90f79f. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZK6K2561754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3fd38f6d1f6116d56ebcbe077f1aae62b135cfca85409d27b0d3d7f1466606. 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/GBKPL1897106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc960e5fb554c8c314270bc86045f5328c07621e8cca918477bf61e9a8f6eae8. 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/USUYG1220779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c48db10f956c7628d6b695e1db370584b50ea99e438ce65ab997ec2a9e017. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12001416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f313ff6a27b10edb2e21802fa8848df3b85ba700c2743e80b53ebe7e82139c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZCE61802031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28993c23976bbd96965687da49b8315b8a248eb2474f98088c9b41dce840cce0. 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/USEP42010051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb453b634e9194063f6110924806d7109ada586117082313643bcd479dfe1f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM24S1705232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb632f407a4a8fb57be94d0cc32e5898d1238330400083ad9f14edbebc67f972d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU3792728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9559ac415c40d400e7d4cbe2ce6a2162d51d5e6895ca1ab2ffc07793ae1216. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012056595.
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