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 0xdc14767a46e2a48c55207a79c66e84db733cd19a67add5f3a907b1d2210595eb. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef8815f1-a2f8-4e28-9ee3-bb8d6a3a7d31.json and https://artists.proofprofile.net/proofs/artist/ef8815f1-a2f8-4e28-9ee3-bb8d6a3a7d31.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 0x95701a08d73541724cee35b5f3d76e758131c9fc2b894aa7515bcbc2be824450. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GRAG11800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88906c4bda25a364c9888181df0fc8f2900d7dd63183a52c02c54fca348e5945. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKR6V1914164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f467ba422007f1814bf64bd6c42f1b2c9b392a91a44c4b86fc4eb764be1ac7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:41Z), 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/UKR6V2010064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad0f86f4373f7b670ac927f6eb72b35939ab2eace10d5aa35669b9182bee951. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBMA22092616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f11f26bf6b9fff412b886894309fba28dbe00f71c3ce72a1cc5aa9159da55c. 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/GBLFP2017584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8bb1b1010e28c876a0f30777bc57638c298d33b094f0da419f7515e964e32. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP2082291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70280dcf9a8392bcc407e49148e3b776207037e37c01c2434fcb533dcfc6260d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR96X2008981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca58712d1ec857ce587c3b9b95b7bba61ab2ac4e2b328d04fa7f60aaac8c532. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKR6V2091719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca91d90abe9c2f869a5b950f724efbda4df97a1719e4232591da37ab6429b5e. 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/DGA052269136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a39dbfe8600887f49bb4cee018c5098bd9f4bf6e62e5925edfaa27f4b7b7bd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA062338080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be96a874e71e9770f1d3b3af295d284612286108deec0a1fc87cc96b89b51fa. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA0M2326944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ae1b2545819260e5ab1b647fcedba16af60b8c89fa30a7bb7ec26ac9a0dd70. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:38Z), 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/DGA0M2326945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f898fed7ba0084e3915bd3459f1b2c2bb4f5e4570f752d39072123fb120cd82. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:24Z), 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/DGA0L2370545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3cd79fde4ac5520c7c63242997b2def04273a00eee37e887fdf969fe5e3fd2. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/DGA052433382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ea18078db0e60a021d4ab4307530b179dc956a7f252080c02078ac932ba4b. 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/DGA052464404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754030918522882f8be40d90fa4868b6f32196b77b607678da2c290e7b6952e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:08Z), 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/DGA072415762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12471e0d94a7518daa921a6b65413542506c618c6b7981815dffc986da7eb14b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:10:58Z), 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/DGA072415763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b328cb248d287791c69ddc7ab4dde5fe72bd4994e5677418d9c450147b11128. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:28Z), 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/DGA092496844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7770b3a9c005a4e07387e91805dd5f0ad8cad7d66ed31d927a36eb3822b51fe4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0H2416983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b6fa021f40cbaacd2baca23dab77470ceef822e38471c17f180977bba7118. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0L2463512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f1a0861aaa06d98dee46f86c0df236c11524541e33164c1dcaf0366eb2796b. 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/DGA0R2433236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14642d083d28b2d06589337da7ae48db846ad2e15772e0270d27c12b4be628a. 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/DGA0R2433237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b03018b67a2e9e1e549f459dbd8fea4b1441c7c2ecf9063ae2ac98d7b98e5c. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/DGA0R2431088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab40019711cc544258258630e9998eb748149fde291820629fd44380da8b97. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR10S2598282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8a8a1fdcb5e2f77ba94dfe3d7229551cc4c701302185900c4e20185ea1dea. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:17Z), 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/FR10S2598284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a987a61f74712bfbb6b4fe034df4940b46373ddc184e4a0aeb3c86d620c14f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:28Z), 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/FR2X42599574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd709bb9b37be1b7191775919997c1c93f7041d958f996e0c54f1316f244be155. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:58Z), 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/FRX202553260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d8f850b29a7710fe60b91ae3d9ec79d148676479b1f75b020b686008bd7960. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX202553261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eac1ce927a9acff4a1d7707124acda57ea36f3121c633df3f1300ffbc064a9. 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/ITYEB2300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93af80ef717e8742f317fa09fdc81117fbfb78e2e752571432a8cf8d494fc5c1. 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/FR96X2009119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8eba27a61733f54fd19460fdff7a1303fe571619f1f229b0f15023d5d94e1. 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/DEN062003363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40104e20a3635af85e8e1206c91ea4126b21df4070d445d0fc9c779ee6ccbf4f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX282208716.
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