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 0x9c55347426a5d8c4dca103d1ecb6a26e800ff6edf8934362cea663318c9d58af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5ceca1e-253a-470c-800f-3004617f030d.json and https://artists.proofprofile.net/proofs/artist/b5ceca1e-253a-470c-800f-3004617f030d.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 0x5ff037bbbe428d22083215912281d92c870f25073e0cb2fcc3e6ce2b968aa877. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:16Z), 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/JPZ922309778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e73472ffe1f16be0c6ce30f2005d5bf13fda9f001ddc753d455981ae98895f5. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/JPZ922311298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe49ac8d31ec9cfa9601199715b083329bc615d324307acd80befc4c13cec2ea. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPZ922404036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb45cfaee51014952a3e0808a1ce6b1452053cbc43ed58d39119f6c56e36245. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPZ922404035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e78070f765ec6cdd370b5a33e12ebdeeeb95db538359031598bbc225eef08e. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:27:27Z), 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/JPZ922407779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb801b15634ebd12c90abbe64dc3f1a6d4627c53738f8d1b46f6269363deec25. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:46:38Z), 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/JPZ922407781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4de0990742919a8bb0c72c31142b5e63e57cbdb685c2b2aeda46bf90014b28e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPZ922410111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4de0990742919a8bb0c72c31142b5e63e57cbdb685c2b2aeda46bf90014b28e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPZ922410111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a10b62ce66c51fde2fd4723f632556312aa23840ed536b0387bb7badabe2b3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/JPZ922410120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa424d624688aaa3c56d18739fc5a61ad918fd5f3dd5680ef7c6d83f5a25ead. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPZ922410121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da79cfa643d32d3c2a01b2de29e80ccb06539363eddd05cb9dd1ea866415544. 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/JPZ922410122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf29fd9e3d3303cd77cb7bebfb33cd86954f79b5bee0d5b933dc81297dc429d4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:07Z), 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/JPZ922410123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56422526c387174516ba803f73d8fdb19ba7b976d39a6820eb0dbc05b554df65. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPZ922501154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95034c99a0246ed43efdc7dd364fbe6d0405eacd79eee8a74525944b18fb3dc. 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/JPZ922501155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04448de187dc251a8672303736852518419f32209ab22f5d764c59c650680fb4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKZGC2409243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05dc1914d30640dae16898e15730bf13c55ca5563e792ef6486b1202333329c. 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/UKZGC2409242.