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 0xa93da20d3bfe9efae03ca3723e90bfd097af35a62cca5a440f184cbf4bc260d5. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9d8f0cd-da5c-4524-98cf-fcba7cf7ae95.json and https://artists.proofprofile.net/proofs/artist/f9d8f0cd-da5c-4524-98cf-fcba7cf7ae95.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 0xb7c8a8a62069a8a4e32511790a028884e4b362ff5a45e5008554c62db513c2b5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX872590261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51eb5780fec20f8d174e11a8d8ff812fcd2ff711feef11795d664296c533b3. 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/FRX872590262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c90ddf8b747aae7befce779920bcdbaf5a6930f046e0fc345f4bbbd4f0c14b5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX872590263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1f98ed17befa4130ad5fee276bc172d6ceb79d2244b13e678b76900996eeeb. 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/FRX872590264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff2df65eb944b243b9afa66e1a2375846676abe08e3f02634e33dd7b60a4383. 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/FRX872590265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611a68ccac78153d066b6daa54333c77a395f5bed261f914bf36495a68fd0b72. 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/FRX872590266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e8628b94c24be51bbf3d32fbd5a95c3b960e122d3cde9990dd60f1d2e7928. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872590267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0109b2dfce410686ae906b8ed6871dcf2af81934413f402bce20dbf0cfee9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX872590268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee201d6ca03fe50e82b9215b4cc04ebc6ca0371d818885db7cc1961fa695158c. 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/FRX872590269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2b4d81e017dd898d7b514d784da74d2de40cba4907317f2f7534ba3336268d. 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/FRX872590270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e833d2bc26f2b47817eaaf5f89cf67e284852a96ba1ef9840c0dceadfe7ab9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX872590271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c8f792ca8d998afa6945f7f920d8e2b2814db0abcd1446e92f434ccd9187f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FRX872590272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dad629ce8ca1628407edb4299b323424a9e3be74428073398e0becf96cb3183. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX872590273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3264b9e073ef7c3b8d5a67a58921cbd810d1871df1279a1ce2fbebb77106a0. 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/FRX872590274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd542c0f6267115ec7a82cd81bfdd0d9b4cdc1d9b005fe82d38e9dee73a31c7fc. 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/FRX872590275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8b6a4ceb8ba0ebe6a470afd3e169322bff22d191834a44b55a1400d9e0069f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872590276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff223414c4a82e969df52416670788011212366663e40c7c54e27180ae31254. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872590277.