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 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 0xa72fcfa5cf895d8ca50d209cc1a4029d5f18017db7b561a919371a41b25c995f. 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/7790d079-1da8-4870-87bb-00e91e22c954.json and https://artists.proofprofile.net/proofs/artist/7790d079-1da8-4870-87bb-00e91e22c954.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 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 0x89dbb17aef8c9e724b349445508f3bd0a4c07ac661126e196638e87851995991. 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/UK6821400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888e7cdca5df011659e52c543ba26f0e773b82aed7f4da55a650e5374325ee4. 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/DEH742213987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf4727a0984dfcf73bac8a170d5ec98c0c0b6b30cb69a1cb61d5cb19faf7842. 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/DEH742213992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8cbba4895c087cf962dec7f5f88ba0733f7ffbd0d3b6f2b94f3f92368c3a39. 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/DEH742213993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba17eef3b67527145c91a56ce9439e7fd7fc20eac9540d82a2fada9d4653d2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEH742203108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618c0b60fe6323425bb69299bfa1cdc3ab3c0a1b402c01fe72e6714dc294f811. 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/DEH742158646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2296e7c0693f988968b37ba04fd78dc81a45eee14c31b5335127c4829d96dcc. 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/DEH741904465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54e4514fc45e05d3b4a4dcc35fa2289321399ebd3715a21a163a524a5d1cc5. 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/DEH741904468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795d5c049ac4a1fca164a8cf4aaafc011835778d539c1fa1c3d6cdcacedec41e. 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/DEH741506073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078cc94f92186b7a04fdb02b5aaa73da900ff00d245fa8621099031785a5ae6b. 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/DEH741506074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e0ec8365db15c09ab0498f4ae090a4b1e2642112f018ffa4d6df0ef4e03d7e. 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/DEH741506075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fee0a5423af04a7355a6551007a6569b09f45fe386a67aa47b2bbce35aabcb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:46Z), 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/DEH741506076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670babd5922098a391f8445b88984407b9fac9aa3942ac363c2ab242555ee965. 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/DEH741506077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4249c5a40be410c88b3fb462d9140ddd066476c2778ad96a874f7d66b329b. 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/DEH741506078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf210309c2168c6037e60d5e572d0e7a68e308ec812519673a78079502c7a19. 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/DEH741506079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72beaa2f76872daaeffc8e6c9aebc7860e002753b29949ab5e3c766f165017bd. 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/DEH741506080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8cb6013e240afea3229640c9c7963403f7598574c7308add9f3b3f0a45a0e1. 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/DEH741506084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1150bec0e95d071d51c5a779638af14840d3813e7d0256180a5c2d81420442. 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/DEH741211631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfb2df72a57b23b56f74e0a7d17fd81b5cbb196fe71abcf337f6d4ce1b663f. 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/DEH741201326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff2c820bed2b1916816bda1f5107398bf6e18c00cb95faa2c29afe4fa385b8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:21Z), 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/DEH742421109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dbe93ac373a288f2c9c082afacf15225b32d742cf9336855c55398e4a59eb4. 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/DEH741909269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e0d8f66dac360f39f0a8be23ddf738fe7ad09c08a96e68a559d53a4515110. 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/DEH742501751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabae4cbebdb8d684ede5a9ad1c474026959d1b836f5bb6cef6162c31bb0c71ff. 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/DEH742501752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0417c8f5e147a58089859917a9f61f54f1ac3b606029b9aa8499b6fa6f1140. 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/DEH742501753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3919544610811bd227940b3dea6e723e021c8861c374b5119e9de7de735b7b7. 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/DEH742501754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb2006c78ce9d1ce609ca2f065db06e66616d2f3e3670b7f86547a433954c72. 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/DEH742501755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c47d2d0eb81a6bbc5916b93b0d6b4bd915c4c352e40d1fc9bf74d942532a10. 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/DEH742501756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d01cbf7d6b32c3cba71c52b462a8e731edd084fff298f9cca448bc1c4d6d078. 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/DEH742501757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c58bbc541db2e83ed9446e6b26f163394547b4d2cfb14fc2c6b65118d9e480. 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/DEH742501758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa642a5c05e44eaf2286c64d5f614df02a854930edc3d145acadd266ec7d256a2. 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/DEH742501759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f634b900a48b1066be6126f712a8007e3f57b2dd3d245bb68fbede56625f8e7. 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/DEH742501760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd8c7f89d0e865eb41c5a1e50eeaefdad5b59700dda30d5a6e8340c28c58da. 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/DEH742501761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb2a34cbc088b3c0fff8e6928ab3d59163a575b3e950d257ac3fad7864161e. 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/DEH742435044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065acf12bbfffa8a95debf53e45d65df45f1375b39a62718b7b026c3fcf508d0. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:31:57Z), 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/DEH742435046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6dd9f03ffbd416d75c76ef8e1bd511e25abe1c4b42c720563b2407bc43197b. 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/DEH741203225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53252cbbf73b4da46c06248c82f91827f4625790430e3d856396d663357b09bf. 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/DEH741203232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48e3e9db9c6330c69f164762a4b0fd4ac966345d1e9844b37466e9550d05ba. 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/GBKQU1514038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0aa00c357f97afb43d2d0295f865371835545dff33abb97dbc0dcf9c8c30f. 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/DEH741202191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7999ffac1273543871235414973d5c60427f94b37552ea0cad177bb34af9feb. 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/DEH742513020.