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 0x0f16cae9d44b5896cd0f078a86461ca011df581b3b995f359e970508f8b88e62. 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/a7ef273f-8b91-4c31-9204-d005e321e5b5.json and https://artists.proofprofile.net/proofs/artist/a7ef273f-8b91-4c31-9204-d005e321e5b5.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 0xdf68a29a60d970947f1bc57a735d5130155345cc8264685694d4d3f9d0cf2d5c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZDA81990298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea723439d0efb07fb56c96bfeb3f066d63df36d05dfee90ac672c58cac977d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES51990684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d8d94413561e21a7627d7d9d6fa5c7ca79e24c3fc9974b4e41160915d5041. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ42095955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a32ab866fbba45a5604382f77f84afdc82d737ae245a7f5817a240cdf142a9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ52037747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337d8d32b1afdbd15cb815d0e13f755f559809328f1dd54116e7074716df5f56. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:17:22Z), 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/QZFZ52037748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedebe9c13870fc0266fb0ba2ea5d689782b99b7a5e671fcaa883c6cecb8df37. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:32:44Z), 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/QZHNC1929718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322044571b07e90a5a0d60eb57e594e4a2087f01beb8f1733a2437908ce68d38. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZK6P2052241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7680bf29bfc1037c471eece98738fd32bb067ff04c22f802569d5e218f3daaf9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZES72156233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed235cb241047a428148869e51e208b21ddd2a288a07c9b372fcf97edb401f1f. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNWT2137758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e866059ae6aa7a7f188d2510c6f2ea391dbbbf14a6f157e5617ea7345b06bf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWT2137762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c7ea6bf67a0740522daac40b278310e3020a4f99434f7fb63d5d020492057c. 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/QZNWT2137763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b502e923973d509eaf4b18a737596861a2f3fd1de10de09f34c6f92aeea0f8. 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/QZFZ32237461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d69661d47e2bdf78ae16679b9e4c1fea492c64f786e60b9c5f12d106db56ce. 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/QZES62243359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98036233a93ed7c50cead1b357bb74c2973564ebebfc100ac5e62eac1b37ef6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES62243360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9b84eea9417dcb7a186e866eaae3fd5198e085186450485da2004ff174a6a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:51:00Z), 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/QZK6K2277994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a6421c609e420f6d39d8073dccd352aa4010084bd81b7b33a9c5d55be3c61. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:36:43Z), 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/QZK6M2356938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2085ccd47b72305e070a3d6881123fd1211cc8fc22e0f4f713558fb94885356. 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/QZDA62474165.