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 0x14abe42d1c488e80d944c95f0279e88938be3734297a833b4e88e3c977ea2747. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90b0595a-26e5-4ae6-9be0-6ddd33febf54.json and https://artists.proofprofile.net/proofs/artist/90b0595a-26e5-4ae6-9be0-6ddd33febf54.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 0xc46ebe7f6c77ebdfdfc6e1cac9bc662e983e85e55dec6644ae014c49bfe7f868. 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/HKG732124249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043c68c64c063b60ece0c516f8c6c47f7ee776d6056b2f7806c9f947de891ed. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKG732124250.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e54fcaaefb823bfb36b3feaeb3ca4d289d379231d31bbe6fa34e819b5e0fb2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HKG732124252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcceb1944f133c1a06b2a2b00a49781f1d6ce1caa01f5c401055a2f2ad008d5. 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/HKG732153930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daf26475c1763232e80e3bae0cb31c5286c379a94e32c6370fdb1f4f0ed3745. 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/HKG732153938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1199796da5048d45476b2759934d93f7153c3d338fa47375478bb203b08e3e50. 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/HKG732153943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1538200474c3150f7ec7490dd788e28c15f0b378c3b502fbe003a84493e3069d. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/HKG732153932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4c366c8665e87fdc84ac0a820b723d516caa6222294d2139a501901f625136. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HKG732153934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd6e0e941a66bb5c3974406eaee56afd9e7de4da3046d5b7067f42096b21b98. 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/FRX202522108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c912f8b1b54397051fa65b2e56ffb324eb96edd2e8e82c4def7a79f5aa4f48. 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/FR2X42527965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad15acafdfc8f9e56d2b93a170d151f500b3c84bfb956ff0ef6b672da57a8e9. 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/DGA0S2474453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bbeb27e8d51659d876e86670282591cd24bfbf6f305d8ed4343b77ad19a01d. 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/FRX282434955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670dc2b690a0c628d5f6bb0e15229e9baf052713a6bb2f25359783e94dc29696. 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/FR96X2447360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac5cb3556e5cbdb9c1daa04a5bb4fcb8ab6ea41d7ab9a5428a7c87662706a5. 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/HKG731672636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2fdca45600c03c4277b16adfc3bbbc9be27aa03469bdc90c77fc39d39d1b7f. 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/FRX872366240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ef4fc723f34ce4bb20f6bd015a38ad253a830b7d075b16e06905bd9734b102. 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/HKG732305735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac24b8c15ba307373d2a11600726cd564ae8c399b401aa8e13f220f86275502. 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/HKG732274389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfff7b034dbc6b93deb40b4d2401c04fdef1b8f6816ea2f31a98d28e57bd4c0. 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/HKG731724118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf802e5eda801f02e2961431bd17bbe5dfbac5e2e193e5bf52d4c3be1da584b0d. 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/HKG732153964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fd1f2f83a497804cdc05be6b31e7df0bd18bc09fa7486e8d85d29c8cadd415. 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/HKG732153971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842b338701dfb7ec8d741683c853081b6476d5274b6e469eae8f6dcc3cc556f2. 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/HKG732153965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac76f6b327f5d4241f4b312b5f260bd82069ec0a6b7ad451a940d8a6cfecc3. 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/HKG732130865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610e78c3eb8b68b79b0e461899ba4cc748cf62dbb3a464428852319cb8759c9. 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/QZZ972326637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb856c1950e87f4481d66558dfeee1812cd03fcdb033a1657a4cb004bc4dd85e. 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/HKG732142660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec3bfd579b95196d33db171c2bb1df848355fbb921c57ddbc1f978468d7388. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HKG732142651.