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 0xaa086f4c8a5faa2c2ccbb52cdd319900b7d6840844629b2c3f5daf4af0a0d0e5. 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/db74af4b-f707-4614-92f2-c3ae585cdfa4.json and https://artists.proofprofile.net/proofs/artist/db74af4b-f707-4614-92f2-c3ae585cdfa4.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 0x5825ac0ad4bf404aba81be42db67906d409246ca6a88f9ee0e6efed3eb81e91a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFX2585379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc4a9f2c6e260ecb4d8614b9c30b8a4ec6b4ae4ca6185a46c94cd6236896f35. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ762599812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa00d9557cce425d1db5adf03e6156bb520944b83f851030c2aab540ee71960. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ762599813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5080f0afe70b4732487fbe4a6222ca8725e7a5fa01221bc6f6e333b8817bc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ762599814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e8e319e834f1e6fedae1d8a075d02f3241ddc27bf16fa9af317eda518253a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ762599815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e219144b4ba971cc9b326be8fd2e5c90f2ed5df9d615c4ca6bdeb0d132a82. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ762599816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c4d2dc369b5d41acd51d2196cd0f0d773b36dbf8203ce46ff34f6bd120400. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ762599817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa035629734ee76ca38c9b22aab1b03df33b95492236273e838005238da3e73b2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZZ762599818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691de045177a3957e833a9cdd8914f6f6bc24a5ec3b05e82b8ad93cc5eafb83f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ762599819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc98896c02f13031be4a8f1f0d769c145b6633a487d1c6dba029d9b85163381. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ762599820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421323db85b58e6df1ba04ee0711377a60de6f999a98c0ca256f53dde1470c6d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ782549766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fccbf9e348770f85af0cda3f73741af54f287f93e1c784ed0d349f930f4aae. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ782549767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe4ac613c4677f7c4fb0d367b8733bf4dd00cb09fd896a86edd81a4ba671d0c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ782549768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643b4f3ccb339f4a264ad43299ef328e4f47492c8e47da35da71fbe5bef1c91f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ782549769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ba951e05964417db1cf40ad6a36a89796d2186d8ed54e2990ba7e974620e8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ782549770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a63645af81f8f5d6e155d656174fa441e975ece5d4f31c4f8580e6dfe35156. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ782549771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7b516bd1d43a8f54c578cb71e92b65e6a218513a55dc6fbd32b114d7ae4b85. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ782549772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e21a7d4969d063880d94b968112152e1bcad2ba7ec64833f7f9a5df0719f67c. 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/QZZ782549773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d80ec1feedc22ae85728a6105cfea86b5086054bfd7560ef474b5a42ae3cc8d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ782549774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0dccf8186c897c2e2c950c107d76ed3cebad072a82d22e26d005c39abcad5c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ782549775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f310738a87e518f54e5d820bbec199cc41a97b26e5379876c4911240eca9717. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ782549776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bbe7dd34c4f86bef134d42043b066b70253bf2fb6a03b05b4c0336545d82bb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ782549777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226b8886eba11beb26f35041e75b062587a3bddef87b4a6aebbec7a3e28a66c8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7K2521702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c6dbedb6284e0e8f5764dd7669998ec8c147acb457d7ee9052895d7b7db49. 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/QZZ7K2521703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa2bfc39c862e6b39082a1f12fc63ae319a7259066f45963b1b326b66de12b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7K2521704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd264178f4421540d73b41067602090580d60ff94ddeb36bb380e9b4e3bc4a0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2521705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb359d98bc1c4fd789b09660b3e3570928939f50940a74b861dad512f07583ebe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7K2521706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe187358ae50edfe8f90dc422dcc5c27c1a2e8b1dab4e5c3263a71ff6fc7b236. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7K2521707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b762db6b43b8e907db9fe7fc70b6a2c131e1383145a9bb2dffeaf7bbdbc85. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7K2521708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719a32e066cf55a497ef8086c368cc1efadb7051ae036fe379ce722d27534515. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2521709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf213a211033ec888c3b76d2cdb108500a2120015f66624b24988ce98c216312e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2521710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aed967ca3db87eecd13caf98ab5885b013517194aba2a9e9a1aa7e3addc0c1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7K2521711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199329b51d360d6cea3d63ca36fa46e81f09119d9081db61a56ec703eb1a0d50. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZZ7K2521712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7469230ad4960c01d90915c532035b74c4d2cbefc481227139320e630ff7e60. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7K2521713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b96138a324bfcd7793e5995bd0cbacb4bed52286a08317678035f810c2ff727. 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/QZZ7K2521714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403cc8c4bc846d6b3cffdefd095170759a789df47b44f7eed277aec37b75652. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7K2521715.