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 0x9fca67fa95653795ca086bd92d972cd68109cad31d04e2c1f45a1055e6f27711. 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/60995b40-3cc5-4a16-98de-3a018e0668f2.json and https://artists.proofprofile.net/proofs/artist/60995b40-3cc5-4a16-98de-3a018e0668f2.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 0x6f8d65ac2c3aa47fd2b2e866a8b51de566aaa35d625dd6908838bb87817d542a. 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/QZK6Q2160222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c51ee8474f017ad2c0dde24c1b307d855a3fd2b2b3fe93f7d7a95551bf3dbfd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZRP52120720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9935c0857bcd8ac989007ffe2ef27877d0d8cdd5ad039b0f74c24b5212bce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1445569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d729a3262afb8b6bf27ce6a69aaf66aa7e7b5a37284d0cd4b04dd7731d8917f. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USUYG1445570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f826a4c158498c15fabfc632f061a3dd4ff8316c3a5df79c30e4549af379bd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB22251903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cef2a1f2b92940c974e2f5940db1968e64a34411297cd3246503292bbfe33d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1452639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce26758653dff2c2f2d9d1246e8017a25ef6f0bc2ab9e8436cb39c157f402f02. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZDA82313852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b485df53bd32fcda1a45b200c5dde00d8f9d1edbe7f8ac82b48fea42b9a5a5. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA82375170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dd52bcd1ab31f2ccd4093c2397aba0c3dd9dc991f454c75ee9908a980a07ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72344973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a61ae1ce5bfc242996de92f2885b09e943b4cf057437a88fb375e96763af27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1472063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb0619f0286b48d03d4b9bb34a324c8fee1d5851fa6bf502720665b7d7d4147. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USUYG1472064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa81acf71928ff9b2d28c2bb43ecfdb39c46419f07d574fe79e8a5e26db3b6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1472065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e60b94fc11df6e974347510f71b56e686fb7e54d517970c8db736313c0aac4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM3DF2212197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa886de2bcee1b808735267b72f9416f7633df86084de84e0cf439d7d0b738e4b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USUYG1472066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb55815fc25922647012ceeed3fbf701c06e2e83273d3de78b181af4b1652ad2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USUYG1472067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaf5080c28a83fba3c4f222e089da0932d107256c268ef9cc1bc1e542f33f7e. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/USUYG1497548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954930147be99591cfcc6b82ba0b39e0046de4e4e92c82b946f1931e4acf2e9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USUYG1497549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64adfa63b634f07dceb83f8185496b494c9b38e26ced8e4ac985ea216bf53816. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUYG1497550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7622633f1a60ec053d438d9bfb0a5ceff973334a7029026974ba2daeaf0899. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USUYG1497551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b23b9c2dca83c8ff37d1894ccb4f8b3a5a46703009e1146152062521848960. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USUYG1497554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538c28a666821722b2a4d1859c19d54089c552d554000d9ac2ef954b80e515f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1512210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b06cc45eb050c996ad96989179454d46f6680ec9801f0a61f7bfc2aa458172. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1512212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a057b68d690a83b10fb36bda7175a9d29edbe6c866420d60afcb38aec0c81. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1534377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29105e3a91152d69a1f634e7bffcca13badda94e213d36f10e65c9854f77fcdd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUYG1541698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3926a42227ab1573c84437bb03d719ce729c7b045345e7ad4721b02d22557. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWS2453501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f15f5ec38a6c47cb72f37f0d0e7843e5f7f38c3c146aa0f68dc9d40b2eabe. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USUYG1563506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba6f52fe91b7806824ffbc4f9aca6b49f8037e175309423f2857085e38233e4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USUYG1564879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a46364939c269b3b47adc8c20c2df9c0b608e38a7a5e0346a04e216bdaf627. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTAY2507001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a3b41f42b6ed8601cb8dd8996df6f991fdf7b7520e131c2cb86d7be4f2aab. 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/QZMER2594051.