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 0x8dfaf0e500a804c98573088b3ddfe525a4b13a571f9053f6fcd1bcef682f094d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a12b366-cd96-4b79-90f1-0b3391d3d9b9.json and https://artists.proofprofile.net/proofs/artist/6a12b366-cd96-4b79-90f1-0b3391d3d9b9.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 0x2b3bd7e0d8c591ee386fd87ce40657cbe2299492848d8fc3043b82dd4770e0af. 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/NLFL72000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51940694952cc3bfff43c4983ef712962718620f026b41d4404f324c8178ffa3. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/NLFL72100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9bbd635c943ba348cab798c085946a3af4c4316a60cb2a3fe7478a9a66d4b7. 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/NLFL72100879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62439a5e4e9580d4124b12a0f94059784ce7d184b1c66048627f53e74a66e06. 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/NLFL72101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008109024f9c3aadcb101eeb0373de1603f2581841d0f118cacc4d1ccf866212. 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/NLFL72101072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1476426d77dd33f353987edc1d32e2adcea3a9a3ea2b99929c0ad52171ff1f. 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/NLFL72101239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a640dc3fe6c1aaa6819fc3d8859599b954440d12bf46c4936c98a58856e3fcd. 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/NLFL72200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e003603336e44a1369cef09750b9bf54df26634514828058dc4877750b5ff7e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLFL72200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498aec3585b32bcb24dbf8af38432039700d4ac19a1fb317565dbfb1f165b0f6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLFL72200557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe041b56cb4fd1a6ee85f8dbcf35ce968fc372d280c13e790da7d4d60bb1526ca. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NLFL72300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4bda2e642b9c30a5b0b99b8668423ff05c4d5ff8a37a1ef5e3677295317212. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLFL72400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a51748a960ff7996efc06f875d6abb68c0a9f258d60e49e48587092a3f0592. 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/NLFL72400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4bda2e642b9c30a5b0b99b8668423ff05c4d5ff8a37a1ef5e3677295317212. 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/NLFL72400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a51748a960ff7996efc06f875d6abb68c0a9f258d60e49e48587092a3f0592. 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/NLFL72400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb58431b94725c9f6280bddd142b887c298d891b6c40ce0cdcaa592316cff1b4. 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/NLFL72400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e117fe6e3eb496775cd1ffc439d7bc1fd2dd5450de5201242b7074e436e0f. 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/NLFL72500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912f1b50d11d65a75bd3ef6e4a997e26cb6977996b1c6e6709aabedeafc5fa66. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:26Z), 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/NLFL72500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1476426d77dd33f353987edc1d32e2adcea3a9a3ea2b99929c0ad52171ff1f. 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/NLFL72101239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7ed22746c61b4523b906f3be4c80fe3def92348154f095bfad2c5b977f5ea0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLFL72101039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b151bc634e9af3f4333bd01f709f96b7cd145804c065b2537bc0cb7c7ccc01a. 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/NLFL72100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45546f0cde172e65db4b146a2fe6aef8d2adade5467d7a271f626dc4e351ac. 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/NLFL72100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bd7e0d8c591ee386fd87ce40657cbe2299492848d8fc3043b82dd4770e0af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLFL72000392.