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 0xbf89e4b7145dc1a55c05acd75d8ee30c7190be311da7c356dedbf02e7082449c. 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/a3698e82-4a49-46ce-b564-459d9cb56678.json and https://artists.proofprofile.net/proofs/artist/a3698e82-4a49-46ce-b564-459d9cb56678.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 0x6f17a84b156a2d0fd2ca8b0ba708c3050e1f0c7cc1e30e12968bbeaeafbef4e2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEP2074451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c0a73238b24d55a7823a5b230100e829ab64340d3476aa94e6bf500e858e91. 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/QZFZ62110047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a829559511c1b9c08a9b358e4a9d7639b80db450e6f135f72f743704e2a95f. 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/QZFZ62110048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05c58dde6ff068d5d8694bf2ace67c6cf396427390767456e6e06915a08642. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62110049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5df793706cf95cf4714efe21e37803fe391bdf2718bf0d02775c8997961a45. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZFZ62110050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cef492b4692d30d4dd6c896ac0ad7e4f7bc0accb1cc8560ac50c6aa52560eab. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWS2100772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcbcf7a7d360e8dcbc68a688e48f2832bac0d9dc202bb3017e9b59a9fac0cce. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:25:41Z), 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/QZTAU2112615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743265788d168e5462f5c181b20b31a8be77ded6c454abaa0291e1dfeb429d1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:06Z), 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/QZHN42231743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc457b8a60cbbb90d246c6fafc429c9cc1ed2e51996649d7839ade559156bfa0. 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/QZNWW2004902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509971780e010e7bbbb44d3adad6d2af21986d9f013af57fad25dcd7b682e2d7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWW2004903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8022a0e46a160e127272d651f5fbbb02cc86f56cf8f18c91c9bd453faae7b02c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWW2004904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc4261167afbd0f8b0f54a350997788361fd415c81dd08c743f4c01b9261ce. 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/QZNWW2004905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa915c9c4bb14955592b281b87fa856ad4e5327ab7dc276337e04da1dcbcfa379. 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/QZNWW2004906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c5053c6221a891740af1aca2c6ea7a42189574f7790ff9c1150efd90c85905. 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/QZNWW2004907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102c779429b84a9f02a26d1f0f73ae3a5bb3280f94b74527f15b705656d14dd. 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/QM24S2404414.