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 0x4bd3944946137aceda479b060262ebbb90e5bc5424568ecc669aff5e82a7873b. 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/b4fba435-65d3-4c29-8cf5-9075fb55edde.json and https://artists.proofprofile.net/proofs/artist/b4fba435-65d3-4c29-8cf5-9075fb55edde.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 0xf0b410e8e0c2803c525440f98f22b459315bf3d6b50eee0d60b61c5f20cb0852. 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/FRX762244006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8799242dbe5bd2e4d5f2a0e67170a865be21bbd259e896bc4b25ee4d7de313. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRX762244008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3f391f8867f73eb7bb75b2d3d03d998c8c2664ec27503f3e63b7088d60e4d4. 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/FRX762244010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa596a2dcc8bc991329a8f1baa50922f26004bfbaf22d9ab13b12adee66e86360. 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/FRX762244014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e601010c87ae9236ab3a36bf3e8d092a89a02580858050ffdce8d30216bea07. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FRX762244015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480e4c5ba869b0997fab6f3c4fd68b153416d24c72d2865f1bd5d5f5264f5626. 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/FRX762244017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a01771d298042a4d3fa593a536b49f706163527f512d65f7fdf1046fd9ef98. 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/FRX762244018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893070cb6174995b5116a45094013ad0abc1b61827d786cc70b29514d02fad03. 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/FRX762244019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1acdc4c09716a8be999c6db5cdc3327e4caa81f312f900d084a609dca4470e. 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/FRX282026745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101c6e987ea54a6fc99cc37ed0ff72984652bc674664d1629ab99ca9c54bd6a6. 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/FRX282026748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596d2656dc90873654fc3b8008147932303072415b1e27db7863ab97a128fd8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FRX282026749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e6f615f285e31a6f062efa358e11b36aa2fdee7f5ed578a9afa842ae6c201f. 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/FRX282026753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab385402ca932eddc5a63da3c400482c4252409e17c9932a17d01a83f91fd47. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FRX282026754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a703880f8d80dd012e8161fdf9d59ea089b787b0c0e819824adafe53372a86. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FRX282026755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f4d208840c0a8c27c88135e28d17c3d3cb287af4d2449a33a929861ef6cab7. 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/FRX282026756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e316afccc84145848341656c90b505b50d542fa05c70118cad93cad194210. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRX282026757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70679b738951ac7f7cc9846dbe4305c3c5adf38081954cb1cb6b9843784ac848. 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/FRX282026758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc129fa025147cae1738ca1db7b362fb16736e00e65176a35d507eb87bd337637. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FRX282329993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2d30be77e96825f307d2dca47e143be29f4dcf30a9d4601520b8c2ac2c778. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FRX282329994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8220430d135d914bab1725ab0fbc99862ea625b0da03dac9fc3376c40dbd44. 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/FRX282329995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2ae02a5fb338e902188e83bd073df42c4b332847028b4ca1178baaa584cfb9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FRX282329997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e46e4d682982dabab938a330b27e6122fb40c401144499e804b9d6d7e57f65. 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/FRX282329998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d5453bdaba5239ffd3c28155d82a018c0cd814cb0d467969e2442cd38aff6d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FRX282329999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d4be18c561c0c38c15e1aadf46e6e187a53da9021535ecad231f9013b83c8c. 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/DGA082332361.