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 0xea8e334e6ad457e3414e7ac03d94362131460d65a907fdff112c5ce834821c99. 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/3e04df6d-d29b-4697-974d-12892f72dae8.json and https://artists.proofprofile.net/proofs/artist/3e04df6d-d29b-4697-974d-12892f72dae8.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 0x70876b847b5393dd1d1e62d938e4fe9839d2bc8904bc8592e7d40ce7f4d7dff5. 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/QZFZ31922223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901888bdd5497e62b04608978e20ed9dd0ab9eb2f94dcf4a62f09b22d7ae271d. 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/QZFZ31922225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817216e7613779719cdf67fa697213c59ce3c1f0ac537d951d05a24bd713d62. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFZ31922232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f8d8e1140a73fc9caa6442887efdc822bedd644b7cb8f5269dddf7bf77965. 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/QZMEN2033858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f303c102ca83bf18e9f4a47cea725f31a427585cfa77b00f246868d3085cdd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2056862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f9cf3b70c3a8494ef9eda84c23c6e8b1749837a39504bffbb537f9c93d71c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2056863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb70097cc8e142cf6518d20f0d74b54a0a57d7d4a8080f2555666ca1a93684d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2056864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc1aad0f981d64f59f276c9929008206e5b966d9554dc031c3e8448539d6e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2056865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25286608c68e87fe1ce781640539976f00235ff339975113c4ea4dac557760e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2056866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2a68090ca76300e6e7e4ea513216ab48a2a77dde96ea80b5410f34bbc8f45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2056867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc5a40d50a310aa2d40da7b5c421943b16578790b89ee3579171cf5eb16260. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2056868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c68e74d0613ea1665ac35d7868c2ab95f3eb7ccb28a0c09f501a7be628d75f4. 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/QZNWQ2056869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12ec29016213843559d380964e165ab324ab0d91a990831aeb9b8efec14546. 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/QZNWQ2056870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22891dc8daea945a31d08b5eebdb2ba5f2aa29985fc155d1b93c153931c2fef8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2056871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14efd5d6f2647025ea4f8295aa9f0d0522c0c643237200f414c83bc67e461462. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2056872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf490a82a848dd7a6ecd4400c1ece4897eb8aac464c8acfa65d8c3e53f86d61c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2056873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f3708064b9a332b1221ed179f445da083668544c06cac2930191110ce4c4cb. 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/QZNWQ2056874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff2bee25f5c90e050a71e018272fd134537973f99d985a2a3a3fe7205fbe577. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2056875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd148dba18483a60dda9d3083e121daa8c1e35c26bf058a664aab54f9c18998. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2056876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c673e2e30f9a1c61770da2e2e99cfc866d019f5f01742301d65783a99cf89d5. 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/QZNWQ2056877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0200e7cbadcf3a0b1529a4b8f74a79f338c64d8fe60fb8e9be81cc5bc4d23e. 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/QZNWQ2056878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e98cf2abd31ef85744f46070e9a19980ca26bfc5918f9ac2c89770d01ab61. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2056879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ceaef32642ce6ab63d19666c224c0bd2a297e30d6d05c580944189a1fb064. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2056880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c5150eb559a97ba2fe961b38c8882ae73a5032be512f93477d0eda189fac8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWQ2056881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0da4b5d6208e449d2389915b31c14015ccfb38ae4aac877299d30038102415. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNW72327854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192011aa046c93df096ed2eb7bbf6862867ebc8478219d115e6a423d86918e08. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKGP92400305.