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 0x5f9772391c4aa022a8678443d6b82e84c9462fba1e5edc6850a2cd33150ed22b. 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/3e0e4d04-efdd-4721-8079-567a212a4bc5.json and https://artists.proofprofile.net/proofs/artist/3e0e4d04-efdd-4721-8079-567a212a4bc5.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 0x0bcb8b2bf15c45138d11cf175c7e9bf55899f426b0f92bc3d53a4e550dc6b636. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUV70902175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e2c5341520919a660c5d1ea2bd6bba74959cb1133ac50ccd4d74e0d7eb9fb2. 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/USUV71201440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a0f8ecf4c130bca6b3dd8bbae3fe453a953d147a16ebd148f8a141b60f1b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUM71100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ad9e5246ec9c750fa7e850eb327b527777c255605d471b3a20ab984453d28. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUM70999998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd43591ee124ee65b8ac100916978c4c64320674d962d429032ed95208a9efa. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:50:16Z), 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/USUM70967832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a4318da1fc486fcae0c464351aff20d2973f5791eaa191714ba681aa2ef480. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:08Z), 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/USUM70999996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf57089188b04ae26e6d3b45707f75d7e2857171c70409a252fa8a19150e98f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USK340800858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b87548052a8c51990d2953ac8a364c0014149c37cb02cca6f6eccf7a54b5b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USUM71211550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386f63e70f6aafdd1d60cfe390d669cd1922ca77d8a5de075b1d044ba41a2a1b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USDS10812841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea21dc6e1957d12b449e9a5ac80ae00c5c5519da2ddb44ec8734a2618851858. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDS10812818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f22a174b400cc2fd40eb6f5e12dcc3c5b8d47aaaad59cb7f0324b5caf616ce1. 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/USDS10812846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03945501781cd4da52debaba3241cab1b17a2ae4cb881a1c87075ef953d69f38. 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/MXUM70806631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b673dc1fef307c3033cf541f2472812eff3ea2caa34e980137c9824f402f4. 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/USUM71211547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d8f462592122ee70b3171a04d84b0b0cdd5868fc11aa4b870067da8c112035. 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/MXUM70806638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1fe4ea12fe617ad04e0387ff5cdf71ee827e2e086f1470d28d6720d1268e26. 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/USUM70901911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5788968124d6fe34e5d5151ed17130bd4c1c7d59fd78506187092c36e28c6adb. 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/MXUM71100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a0f8ecf4c130bca6b3dd8bbae3fe453a953d147a16ebd148f8a141b60f1b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d22a712b1b4bed279cece90a4b9ee3dfdc9430ac8c19ca7194d89d8d7da5a. 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/MXUM70904496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2b2f454f74157efb460c1f5c883ef41dd25a43bbe0023f0f346afe7c0d5826. 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/MXUM71100341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ad9e5246ec9c750fa7e850eb327b527777c255605d471b3a20ab984453d28. 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/USUM70999998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479b8c2ad9e8c613e07694f0582ba952b330d201f8fe5dbfd94ca3f4886d0719. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/MXUM70904505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8d5ad932b2fd955bbc15da83c56610ed31da119a78e07c7aa5c97608afee55. 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/USUM70999997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb829f38f839551c1ae20927a9358bb28b5b8bfae0af10bc26c67d9eca5cbef. 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/MXUM70806634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a48f27705eb12656633e34fbe749153747db29318a48f18a4d98c557f3a8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71100580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cfcf12b35254e862f1f1e90ad1b2dd9584bc87fb704b3aada4a89c96792775. 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/MXUM70904502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c54fefcb0bdde80e1b1c54aaf19ee925ef69ce08672b38dc64ef64ac29c2ce1. 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/USDS10812815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae949bd3411327d4497b5dfbf58dc4430688ddeecc1f70fe704cb63aa97195. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/MXUM71100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ad76c1b94a2b33a60fd3973df4b65804d0c035498af8a3491f33e6f814843c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUM71211551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9232a785b954c82fd5793be29cb04783c2b2f8d5f03e9e216b346dc68f270bd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/MXUM71001280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368f06f12e34cf2c632a869d47d0079b9eed56f711626465c0f53b384e908074. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USDS10812983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e165b4d38a4f7fd4d1ae2da596c4b2d6d1a329ee94b1765cb3013fe88d97e. 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/USDS10812812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f22a174b400cc2fd40eb6f5e12dcc3c5b8d47aaaad59cb7f0324b5caf616ce1. 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/USDS10812846.