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 0x4352ea4593fd8fa422601db1022e64e66181ac450d872827cf19b330b64a0d11. 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/19e52ed2-fbdb-40d9-ad0c-5ffe1c360de4.json and https://artists.proofprofile.net/proofs/artist/19e52ed2-fbdb-40d9-ad0c-5ffe1c360de4.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 0x8dd6a91d52b4933a379c25b1665b375be8f628449506f1a750310a4473ae8b6c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHNA2386164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864ed8f88fd5a2016bfeeee130fceb1f48df94497c724353df674ecb57fb779d. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/QZHN92422759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdf55b5a3d0353fbe1da847556a7c2cb5ad0526b3713e4eab2bced3b73ae8c6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM2PV1853230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f9793f70903bb231ab31f38f897624c6a1af8baf36710845648421f32e261. 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/QZHNB2361455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c3926f3895ecb1e407cc7b91623cfa85c5850725a5a4f21ed170a0a4a8a783. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QM2PV1896751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e8bfabdab003f08efb4190e3be72a1af242b16424b914e7c97fb6e0fedddd6. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZES51800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9fc1c2cf6642b9e46d0222d2f3e9179a408769ab9fbebd9707a677866767c. 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/QZHNB2360932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86da7b1b4704a831a8eb8793008768f6e99a36a3542d768a1b0477fd57a2c9f6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZHNB2361456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad831b77bac38c9fc09b25a5fc9fa4b434f4676f41ab0fe4411672255751300. 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/QZHNB2373525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a4ec08e27fef59c7c12efa775b908ea6c783f342c398fd6a674c55f73414c. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZHNB2370054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc38f32fc38536432faa361a1f83dc463695a2ba3a1b5fc71d1400218336df92. 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/QZHNB2345852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a265866654611c15874da91f95bc5f531dbdb448ea4f99b90ded87ecaef99e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB2353789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f034835971ea7fc5781059ba1710616221ba9fd374ad2e57a8e62e7ccfabfa6. 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/QZHNB2352440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829951875bde50f3190af4dea02556ce9fa679f75e651f608bec92c5a1ab4537. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:26Z), 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/QZHNB2320920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca354f12798b57db1b60246581084063a2685901df84ea77c87ab80dd8a0cae7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:10Z), 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/QZHNB2306321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b82001fafee84fd74615f7be9c3fa051c124a3651b90f4dfc0d0481038d26c. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QM2PV1836694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e261efd227441bf4740faa17001eaab5d3fe967145f576c0cb31ce3d2e3d6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHNA2389454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b6ddff47d8b4342b089884c0d1175edd4ed871b431e64cd5a3a180192e8d4d. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZHNB2316353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2e88bad0ed5264063524cf5b3b996a4e1e93ba68ad46f2808c99dd2339cabb. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZHNB2316352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27f519a7576a46819a98581e0741a71072c5421edc3e8a7a63c2ab3656557c1. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/IELOI2247997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb68a4e4c628920ba02a08a58e6fff8bf5266e6da5d516c46b9b2c4c3ef120b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJV2488220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0c9e7d74f46fd9335038fa85b5911b3f246da2b83dccde1059b203e43f383. 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/QZNJV2411353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0738a8616cb0cd54642524c93faf1c256b9ab8e00547939a2cf3c8a6877c6910. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJY2452266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20ff53f9fd52a40d02065e2f1dbb2e49febbe9418ca77ae851f65b9c56b6e45. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJY2452242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d50f9fe3aa76e35b52bb6067b48aa3bfeb840b8fa3621e2a86d72f20e92a18. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZZ7U2477594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407076eee52ed06c7d373e0cf7b68ca796834bf37653db0f185763fdbac35969. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZZ7X2485483.