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 0x1c2df9c41c0c0a1e8ea3458565687554d6d91966b58572459fd6d6011589c2eb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abeccbb2-f625-44b4-9101-ba90849c93b5.json and https://artists.proofprofile.net/proofs/artist/abeccbb2-f625-44b4-9101-ba90849c93b5.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 0x18fb35e8a4b57a1fb5f319fcba2622a4ced298afe7787badb3a41e209b805507. 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/CNF182000787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4c108398adb6e41833c71781b1a1750a56cdf6cc5b2193b8c25104af985d7. 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/CNF182000765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873525ebcc8b61a15dd1a867398b0e1a7743b943dfad3c7ca370c376d13a7cc. 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/CNF182000767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0fc364097c49114309176f3988e2f3210061d0ae6a75829bd2d17c6fdc1d46. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/CNF182000769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2dd8bf4ba2d4c07280f8302036c34265caecf776002d739f4def82c52553bd. 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/CNF181702131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb25169e5d2b500573a0d1f64129bf7bdd9982439d733b5a62bf6ad1d75e183. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CNF181702132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba2ee8c09fb7d2593980e7522b616b68a6422b8c564807c9369ad24b88c186. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181702116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ccad4571e88a1b2943e55a4aef71c72f8d3487f9a5e26ee883b9c3b635a450. 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/CNF181702117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800f5e03cc0f35cf9951e5f0f39bfa4008f313e2ed847627dc35f03bc7a97041. 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/CNF181702118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40ce37b46335903faf9b91ad4ff3bec223bb1ef423514704784a86811ab3241. 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/CNF181702119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cae6a62f2e84dc92db3101da1f93bc0fe0dfba6f92925d713214dfa4dbb7ad7. 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/CNF181702120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82095d49cf0e7b1ccb998accaddba7e6e7d3cc74bc1c8cf1f65f3b0573bf2684. 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/CNF181702121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e1d8cad8abe9a577f46e3db5ea6b2dfd5856c0a1e836c8ed8572773b9a5f36. 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/CNF181702122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e802f081d1c50b62ee4b85e3cb4ec6d216d9d85cc4acdf26ee8e2d922ac130. 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/CNF181702123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdff59e1dcf049b4ad5fd7f161753280910184032770b6b1e16b9fad2a41226. 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/CNF181702124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aec2d2aa4d25df17b74823db7d2162d8627b485942f5b49ee5e673dba778756. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181501400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d78141a0826e451b7b8edf83be0eb6243ee8f573262a7e33119b99a0b8efff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNF181501398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e5f6cc6d7582309e1d657a016995efabaf6eea0e7c02e7ec221b3d3984738. 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/CNF181501407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec103ad2bb4c1101c22391abc1d72234c2e14af95288dab7062066ce269915. 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/CNF181501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8faec1101c23590bab854038a6fe0c8982e1396dbdffdb8cf20757b32c5eff. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CNF181501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552f3deb7ead35cad56e18c5e6ff4cb462aebe3308108e877bbb679977e4db9. 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/CNF181400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0077ff1801e0e9840de23ff641cc9ca2411a1ceb3e3ea4a40d837b7e887ee. 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/CNF181400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3f706c96029362fde48fefb9782560cfce78adb67e23276cd2231c1e94f45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CNF181300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaf601f90bf8dfc64ae84efed1484accacfa063ae8e0f75855e3629c81dfa8a. 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/CNF181300562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4621a71a57d52290588bb0780c7ed54faa71fb95e1b8e5666422507fbdb13f57. 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/CNF181300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77566047718bddc2216002d86ac79399998ca319a81e7ec232855581b3801858. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CNF181300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77065438659da57b4d580ef922f01bc2011f6845fb3603f370455a253540a85. 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/CNF181401643.