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 0x4033a7aa3d6d78a8dd0f624756be97874e28ca6f3c58f14ab4091382def62215. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ca7e503-d8f8-430c-9cf7-0b8eb6c643a3.json and https://artists.proofprofile.net/proofs/artist/0ca7e503-d8f8-430c-9cf7-0b8eb6c643a3.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 0xba4e49b6b0fc16fdb10d94d6bc7b77d3e9a800a507cb45c1ff6c0a8b384849a4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USHM91129271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6224b6be8c9dc5f3951d18908ba8d54962409bebee73047782f4397eb3adadd4. 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/USHM91129275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb030ec72ea9669d499beaa05661d05d21492970565187928eedfc2e543d57b84. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USCGH1764050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2cda4f9f965f85aae8aa973b7cbb34c7557e52c6ddf7f0bfa536fd15c4bbdb. 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/USCGH1764051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e12c404b9db8d2da138f231d0cdd46e209800cc28a230e1eee3af1d364d654. 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/USCGH1764057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f33880372fd2aa7f10d0a3b79fbe89ba8cdf14e233f1e76280a72ae294022e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USHM22542514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2b100ca8a1ec509c9c11607b1c6292bc14bb28596713986ba09db5f849681b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USHM22542515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ece56c6c7841ae99a091cad99c5a56df28e9f53501e6aeac8487f0e9fa6b7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:57Z), 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/USHM22542516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f156fb1bc964ce2701e09a03a5e48d8531330b7ebcb411d0e7f94591379367. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM22542517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542a17c6b162271fc6762af3643220aeedd84464b1baca1625323ad5df9fba9b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM22542518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0adacec0c8f00f5723e979db96eb08f104c895c9ef8a30189bb54e47ddf4f3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22542519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbc1155adb941c98fe335e8b16d8eba61b9eb56f7db9a37dfc37b1b5c250f64. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USHM22542520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf78a7234ee156ea2af8a5696879320fdc6a4bd32619dc2a720781a87564c94. 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/USHM22542521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c20d1ef05f98e7cf581de74b848f49b1bc509bb7a7ca676373e1b56fea29ac3. 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/USHM22542522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc34483e3d27f779a3d9a16e0b8ba7ad6a11cb845555b78ab2b26db4693bd259. 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/USHM22542523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161af05da0194c7a97c8812021aa85642b16dbf6ac343e6e7a3b30518568e253. 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/USHM22542524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e240698ff0a83fcd01c9f43b27df7d8ad9f4dba53d4018c0be399b5d36fc5. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM22542525.