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 0x066adbb858ebbc7ab758043b5d10e0b0d47efe523f31561c5131f11e29c09a9e. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8c3176d-3fb6-445b-9efe-b22176cbff7c.json and https://artists.proofprofile.net/proofs/artist/c8c3176d-3fb6-445b-9efe-b22176cbff7c.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 0x7a2dd568fd4fbda914521d18ab852ab744d2ba7c46f980e3afc99cac4b1d12ac. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CACWV2575955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ce4ae38b7c05818257d22fe02eebf0133718dd747b73a648f3a41846dd8d8a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CACWV2576012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56906ccc39de934898605e89ff0776570494a311a2bc1847dc0002759a77379. 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/CACWV2575928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f020e179d1e354775fc39724ad24469683ce9d8306f9d07fe964531adb3ba55. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CACWV2542832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98819d0acf31baa402338139c021ce65207f1181942a4069a77d7382daa005f. 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/CACWV2542838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f2657fa04d86052d56b0943c87263de272a28a5ff863d02cc76f3204d834a5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CACWV2542837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb6705457e79ab4e63f4010d37e3be9a5bb596cae04c351c08d14a0c13067ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2542831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e2b9774d9f78d056b3f69d4fd518f77a59f00e3abf77aa3cc2f822e5723983. 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/CACWV2542836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1e0a59a7a2bfda25adf07eb71319fdd88b9f3f111e3c46ca8eb35dbee1bcf. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/CACWV2575987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9cbd5e006b284f44274a95d9268d7476c150bd73942ce40a5458f8c13fbebf. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CACWV2542830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a461f8a28ada481899fbcd46702f5ab9a5c12144a8add1b34ba825c386045. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CACWV2542840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41bd2f525dd19468d13d2941d9b91a463fcf48a267ff94c6ca19614aa7d5edc. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CACWV2576046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969e30261a3b3142f9edf204e3ae83a1a23130272b7714190b3539d6a3da374. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2576360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00eb863fb50b5bae01e8059d59fe8c48ef6213891e22c61a404082652abe27. 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/CACWV2576359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb2c42cfbea39e7dbbe6c6a74edadb32c0c0e97ad6c86c83e3e490c3171ddf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CACWV2576364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd1ae4582e8031fa47c00246505871296e449763d477416795006d56b38f46b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CACWV2576362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653330d53399284573a1b42c88664e934284dddc5011d67f6ff5b089bbc31d2. 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/CACWV2576361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeba64584aab9186d1509885c0143c2d195aff68eb126c15b50ba1663f9c500b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CACWV2543240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665a32cc43e76aeea554a57b7899460cc4adbecb70a125d0270cb0283d591931. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CACWV2543242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1619e525c960719c34f4ac30df79fc58045759f90bda47f716b3fe8ed75737. 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/CACWV2543241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e45fc92277f3bd1e0887aaa7d14f292197d71db129f79d5fda8c0a597c0a4ae. 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/CACWV2543244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091f217141a0c611b734b25f03879f0d809fceed3c84f05311a38b3f3b60895. 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/CACWV2550583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406aa999f641455736568c4628ddf8825dc46b8563830fb771c610063d0562b. 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/CACWV2550582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1161c298183277da9cca2c7afd49a3d4e3f22abf3594e535ae41d10f92ff97. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CAENV2528496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c400a2948b9c0956e1b263443d465addfdaef49b3b0b0fc9405e539a94a9a94. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/CAENV2528514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69ebd0820d72741df05ebbab9c84ee4fd615708c4bedab26aa3a2d423314421. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/CAENV2528494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014677d0d822570262ab55df5106d7e302b19af96eccf9405b53ea6450df0657. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAENV2528499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e177df3e923dda65cddd30495cb7496704c91d57dd4fc5f1cc54e4f0bfc30. 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/CAENV2528521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f830d4e0a063ed89aa8f01fe026406ee37aad86c9ddd7c25e44b922d02c738. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/CAENV2528502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbdf73dd516f8327daa587daac37bfcdcf7d25db9146d4b538657e3933f6da3. 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/CAENV2528501.