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 0xc24f0d142d016906b74ab06a07778a6087fca2db7a95b80c469d5ce8ef02a9e9. 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/f5d6dcb4-1803-496e-978e-6dd52c20dc7e.json and https://artists.proofprofile.net/proofs/artist/f5d6dcb4-1803-496e-978e-6dd52c20dc7e.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 0x08c7f52065802df03a567b22ef426b54c0366eb7fdd3986d84ba7f6afe530fed. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9L2265428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecfcc2fb706e7c85fd6ffd37135e32fab1cbb724e5b5ca6ed417306d9e0214d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:39Z), 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/QZW9L2265409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b40e7597d7a5698fc95b7ed26e7fb5d11b8dda1a1c7b472c693c36ab378e1a2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZW9L2265425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f27dacf760127017ca0a85aab93d392eaad215164c92edb1bb71a6fd11ab0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GB8KE2302498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfb620d6b1e712480063399893793821f7e951df4c825bbe7350ec8d5e12664. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GB8KE2302497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60bb22de02fb855ab492ec358421bd8ee0ddd6dac9fd3778c62ff45f8fbc814. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GB8KE2424423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c13fe0117d5a4f177b8653ac82bcdf7582e448deceeeed4456ab63cf93f742. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJD2466885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e1492340b3b71beae668d997ecfb5de83707754faa91075e6ea47121fc92aa. 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/TCAJC2466982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2465cd0c41a2ee4f96f18aa7a8f434941fcbb58ab27c2e29059c95ca744bf1c7. 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/QZL5N2559201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df24a9556ed3ece4ca8bfed88045d9c4f9b245842595c7aae73847263a9cb4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GB8KE2511835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb49f05b035d812e5a1eca5f80383b235a86a852019a224785d636bf6cf945. 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/GB8KE2515999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d658ca527a4537033c77eeefdebd3424db5e208f0e9f126e0c83b103cb3204b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:37:02Z), 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/GB8KE2518307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dfb4a4f1ec4ea996333a6c3d28232e2a2405ff05c0ceee31bc9159bbfaedfb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GB8KE2525020.