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 0x0e7067f2368ab83366604d96f2b325d3b9c33d31cce3b35d12eca149f5abfe89. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca3cbc71-30bf-403a-bb49-533536590824.json and https://artists.proofprofile.net/proofs/artist/ca3cbc71-30bf-403a-bb49-533536590824.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 0x190f29dda31a548dfd0a27526134c3f310248cfb646075c778b4e6826801cb40. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2358607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ad6d04f88344b76b73f77f028ad6379f6cd380ac264135f05ac6d7e138002e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2358608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412d8cc19f03713201d3cc18fb82e1fec8caf5bb89140af5640b6821743c3692. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9L2358609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20543ffd104728b3ea93c3d81b9da8e6cead073ce24a036286da5afda25e2a2c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJV2305577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7e25182759ad866ffa19730f917ab525761141a5a470415012f04be88a1b74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJV2305580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d20f19448034b5720d5c858ac4bb276a26aba08b46ed47e61a9737a66934c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLS2352808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932bbb1e599b9323cacae1eac450cc27464d86dbec6d382473ae5f6a1ca850f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJW2291800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfa096e00a41023bad2e623224b13f3b04e69f65461bc5184ed546dfafd922b. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/SE6I32250521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932b27b10b7f9851ce578eb72cccc8c91c12084759cfbcb6a07228b396f30d85. 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/QZNJV2363743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae3459d3a94833316350bcd34c0adbd2c7467ddb8bafb3cd8623a15a810064. 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/QZNJV2363745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc43777a0e5c2a848310087ce8543993a1f95d90bb46fe35620ffd07baf411. 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/QZNJV2363746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3788561d834107d6187df2bd3877c9d392e4a0637c187ff5adf97ce027d5ad12. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJV2363748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6cf89d4cca0b9d526fb08d95b665e2d47813f3d79513dbee6edfd705a5cb12. 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/QZNJV2363749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b44ce749d409a3edb681da521f5e0c3e66937f257035115b7132c4e534c5e1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJV2363750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f5fc9d5d93d0ac3bf0c388dab66e7a7d73bb8f9d1364cbae3e14aeec07871. 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/QZNJV2363752.