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 0x47903ebf72ee778b22d1d298bebf63cda6130177d67b93c7b73583ba97d97286. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1909d39-1e3d-47e4-bc6f-6a263d3eaa3d.json and https://artists.proofprofile.net/proofs/artist/f1909d39-1e3d-47e4-bc6f-6a263d3eaa3d.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 0x459badccd3ecc0d1d0d136972b58fd915f1e1ed9ed6af0a6fd2569a274037f9d. 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/QZH6S1900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bfecc59b24990294bbd94be6a188c515aceb5f1dd6a7e25ea99a48fb78ad5a. 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/QZH6S1900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f3b76be36df892e5843eebdedb61a19dbc201ea577970c4434ae73c0df3c6. 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/QZH6S1900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69740eb7596532aeeb3ea1dfb1fd2cd53b017a79637d407e7bd39134b1b8be56. 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/QZH6S1900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5295bc361a5efa9d366cc9c7968e0485772a1d58c008d5218b995b39423a213. 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/QZH6S1900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6a064133b24b2e15259f51c0da090a8f535d3b9155ac828fe6392ba9058d3a. 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/QZH6S1900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630a5d54bc424400f54583374b3760f9ba97e3d3ddaa2b9979c35350cb9a94cb. 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/QZH6S1900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e2fe55cdfda029a6deab4831ca2d7ba2e4906b022504ade59627ceae35f42. 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/QZH6S1900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191177fd9554fb950091c06cbc48661e758f36a0f20551c591972bd82bc14292. 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/QZH6S1900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fb0a7133ede43f44d93043d8b6f442e9d41ada3e15bafbda852460fade11ac. 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/QZH6S1900323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325e2e1a7d8e37cda662d8197a0b9bd86d345878b72f3e9476c4266d23994d3. 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/QZH6S1900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8661e71953739d4769ff3c0641bbcab6bda06814a59e0769d400757d09a6e46c. 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/QZH6S1900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98349487539bea5c53cf3b346263bd38a8a139ccbcc48766bace4b168364d26d. 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/QZH6S1900326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b75d4718c6d7008ac67ef172131b5c775ac60442cfe5546d20f9fc966f8d53. 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/QZH6S1900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884b1e18d7866413597d985563b649781e3c3f869576bc176cbf84648bd52d48. 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/QZH6S1900328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7597016a1fd2fc792d4a717acbece896412dddbf78f5d204484a2b50bbb94. 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/QZH6S1900329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b5c685d409323789c64f3219f9d2191a74d4af5aefbc7570f967376372bad5. 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/QZH6S1900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14248b3f825887fd09db29f2b66ec18380f5b8a50678038a8a76265089215883. 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/QZH6S1900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0dd97b0b93a74f97f2c774e7592479c5edf3f27d37886bc484581d1faa53f1. 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/QZH6S1900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79761c291d23ee962f5f38412761c74e8b945d57a46804a92f03b67e5d304aec. 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/QZH6S1900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec6f7dbe8b4f4e7225da0a05d269638ed0d574ff490f7741516910d821ccf2. 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/QZH6S1900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6788b4f22aeceeacc91a1e04c26e10ce518fc3a0e09927ee44a6689c9e124cc. 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/QZH6S1900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92113d2654c15f54a508ac282affbab453cd6734e9e09ef35bdd8e0c5c40277. 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/QZH6S1900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf018107655dffe45b707cbab3c098c2cc3449a0d7630267be31d7ca50927d84. 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/QZH6S1900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190c6a206cdb5652fd691714cecb36a1e987b59abd2c6792c3b7c7309ecf39dc. 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/QZH6S1900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6d5dae4ed86ae4923d8d860ee4c4de6c4106e9ede9b1d5a6a625c87ef9bc5c. 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/QZH6S1900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd5ac7fcd7b21bb54d5430ceabea4ecf249f035d26e9d00e93e5eabcb000dd3. 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/QZH6S1900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c20cc17ddcc456f0d9ed662f1980007e08458c33058cbd0bf84cae779535ce. 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/QZH6S1900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf248fe7329d8d2043cfe09ef80fab6f2c9ff10068c476862cac651b58e2e3e. 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/QZH6S1900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ecabd4109a681d4b6591051ded3246daea850f6b2681aae4024de667e6a8a8. 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/QZH6S1900343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242bce5b50df2c320017e3e6edbd9e0c4a6ef186cec9e9797265b0da1396513. 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/QZH6S1900344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267e2423d50ce267070356eb42910c6024725ff236fb29bf9d22434cc73aa72. 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/QZH6S1900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5bb77ea4549ec89ec99803b8031bef0315d7b0bbb0d5055e27cf89a16286e9. 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/QZH6S1900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec6132815845baa7b67b8e91caab5e7e9a40494e818107c8302b2674917ac4. 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/QZH6S1900347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e84d67ef27395229b3e5aea8ee5876366428d6435cfb410f6de56d6e79fc8. 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/QZH6S1900348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7040d7beb140287562b1edb43f4ce361f81bb2897360fc171e9463c0bda3b72. 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/QZH6S1900349.