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 0xbcafee4051be49efb87a6b879d3e75dcb892903115d6026fa01e5246389948ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bf491b4-e538-423e-8ba3-8cd0d9c2b555.json and https://artists.proofprofile.net/proofs/artist/1bf491b4-e538-423e-8ba3-8cd0d9c2b555.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 0xef47bb4e849cf91eadbfcca0f1f6b6d409730a1491e881e078387c93cbbf2694. 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/GBKQU1952631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90de4d043355df66a0dba494e29ee6e2a9d32278f259fe00dc08c065cf4959. 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/GBKQU2336578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c69e9ff6a272161c21ff481148442977ab5eafcf8ac009c8578532a5e38ed7b. 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/CHD151700233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3b3329463711638c8bb50a3b6b0a066e1d7c92eda92098fce39eeded848df. 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/BC7F22400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675fa01be378d87d716427c6810d149f5ba5fce3be36d463035ad406200d2250. 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/BC7F22400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1cdb0feed350e12e0522550732ab71830cf380b40f1b21153da35eaced9ec2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BC7F22400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dd69c4a4af5b3b2e294acc243beb3a75320149e066629e087a6ef15eb3b088. 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/QZZ8B2379906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a55070d2a643fd7703efe66b86f67585bcedf5a0622d4cb6e8f480942beadc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERN42400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf771f49e07f31251aa2331bacb4b7b6fc49fb429005820a9c58639ee4df10ad9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERN42400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816b480d699799f2b0475e82c49ca4f0fba2899faae26a515609104c40dd1ab. 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/QZZ8B2379865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c5bfb18531a1cb58632867ba37faff72b2e69a133979d15dd733aee42410a. 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/ITFGO2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7ac29aab5c595349ae39c5dd36372faa34c4923a78ff942e8c7c48fe429cc6. 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/ITFGO2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a5c68e3ab22caef97661c3c19378497bf3c742ac21396302576bb25685406. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEY472376326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90de4d043355df66a0dba494e29ee6e2a9d32278f259fe00dc08c065cf4959. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2336578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0bd00ec35fba212a2e40cfb9e37faf78c404256cd2ee7a1aa0a1ab959e730. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKLVE2301384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205dde285da72841ddbf0d18bd6001b1c2ed50d8f57219d93cbd11ddc3b967b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEY472373658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4c39c29714be26393dd206eeb6a8ccbcec6161334d4a21c11c73c110245aee. 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/US83Z2307860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1abc81a32610037fe3cc78bafab9dcc8e5f6fae4356a4b5e14285574410478. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBNUQ2300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b19e884d67146eb92b4a5d3353fc40ce982970da8f4382a5151002e1d9dbea. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202302076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4744d20a38a80be6355e4544a213267c159ea4117faa95da954874a0337ce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLRD52222790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c46c5039517aaec5b78e6f8fdee291bcc96f391e45973271cdc45e5eb01f97. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITYEB2200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f275cd0f25649d44d65e5d3bf76755779f84dcae1d3368f66b36097f00c03fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITFGO2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad0502e1c2bb8353493ef20987ee5dc75ccc874c96d5be7896d0aa94d63cad6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITFGO2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce94580d2b858e4da947977a3ee8c768c1aaa5bba8996c193489b10fa78612a. 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/ITFGO2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e18c228420ce8d03d9ca16a5f2e445b1b11d56cde4cb5acd75f315c52636b18. 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/ITSV22200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe61ee15de182901d742c9e094d7a2563d5d2f1c8c86950b77c64aa65249c375. 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/DGA082299143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2842518b7ff926afe63f51ff3044d350f53295c0f3f9d2a35d8d2f4c1ff57. 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/DEU672101614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf144637d522680382155089a96b986f65b5086f3d0925987dc4ae5a729bfca. 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/US83Z2137209.