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 0x3d54520c9301cc1e1a0b0900c081326eb268342abfc73d11b0b0248ae161e656. 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/bcf0ca26-ee34-4fbf-8489-d424785cd09e.json and https://artists.proofprofile.net/proofs/artist/bcf0ca26-ee34-4fbf-8489-d424785cd09e.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 0x70e7036d4b3ce4616324547cefc4defb630b2d8f4b9d7b34989e5e69e9ca0549. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TR1591502668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f66aba85fcfd067acfca4e317df22e25ded42b46594833a08cf9f7fe3fcbc36. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TR1591502672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f258e9ca4c79a8dbf8a61f5c10a24018294e5a01deb2b3af68fbd0fc5bbaf4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TR1591502676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43f310d46e1ef49505d4ed4c14eb44db021147b7323c21bae913cf20b3f189. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TR1591502674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4dfe0400e415675fa039bdbcb0bc8e096435bbd1ca7d2774943e2144519736. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRX202241632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2c666dc56781036ea2d196bc60cf4ff9f761321491c6955a77e7801962562. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX202241633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15077548aeec87cdd9dc39a1ca7cf9a97799f271cb5e616169244a76d0565ce. 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/FRX202241634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc85bd95327c6df177f91fc7d1fe30df5114e7931b7e80aab312eb0ffa6ea6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX202241636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d12fdc2c912d4f867c4b83e2e5bc3e8b62825fd4b774bdb4afb30d6d852ba31. 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/DGA072201393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe741d61bb3e952dc505c95124a478ed6c422969aa237d8fa809bbc8b89e71d12. 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/QZRP42344153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8862ebc6ec924c39f3800bcf08ede27f15ef02c485cc5f1562b042bcd79f50a8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZRP42341269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaa6a3d402fcc97b366097f8b1c354a8a773778109674027e32b48cf1b77976. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZRP42341271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc500d3d539d19f91330261f8cdecde6d0b39446c54e64848b2ee37ec52af1. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZRP42341268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d9409d3c46f105303cd8355a161c6c752811c9c7a1b9703480025f6503fe11. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZRP42338078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03fe0f5d48b33316f21b8e09f003c58a00adac6d79f1f58daaff97a4376679. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZRP42344156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6900fd4fe52e3fde08d0fa838684c46b0870ab7ff900edee0999227f7c482d35. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZRP42344158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2461eb1201744781ef9eddd961cd2cb1bdf3cc7f3df9483eaaad4f9147cba. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZRP42341300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc41535f5c26aeef4a686676b7e30788c9ebedb84056d9d92961d44d41da719. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZRP42384747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f4fe859eb92991310ef0011127dfe44117f408162bdeec17ed28ef075ae217. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZRP42384743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8bd7e57aca545008a29401822f3dfdfa760a3a011c405cf460096fae82227. 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/QZRP42384746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a48f4e5fb19555dce0e2dd3504525d07759b1004eb998c2b22dbaad1e9a0ba. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZRP42384744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf7e29ac128e73bf8e6882561488a08ebd3c7794392c5e3b4c13c4301f61e4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZRP42384751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb757a90737fba108bb3559dd2429ba0d014f7cb040a2e8954dffd3fdd3123497. 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/QZRP52330518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0499879990d2d6830b85d04b61deea700a669ad6b77d5fd16bfdc0006b0acfae. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZRP52328911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c0bb4daa94bc31e471155fa5cbe0e93bea27f9ea61362113f8ff56865bc83c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZRP52330519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0263a2fa1bc5f419feb7db3d99d69c7ce6c6a080bf48c1b87b636e53295d2dcc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB42320843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d779663c4e6a2190c79fec078a393e6fff4c5f4d399a6f53b10df978d0803c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWV2496680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15f392d7db580278f64d4df591514056e0db9a55b5b28fbd2392f1f5464d53a. 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/QZTB22548223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb0a665d511d7c8cfa6ffe1cfaaf600c78c83bc7d73b3e4d6b637d4e2a52ff7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB32589715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988b88d72b57c8db45108fd568d7a9b066358b0de1a6301eb1d17deb216eaeb4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFV2578084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44be05bae7fe0ee875658538532e1bd08c4181a866cb8c047bc461c5c3cf4cd. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/TR1591201540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dc3f84df97e44155688d2da7d70f8164775182e455404359dcfb5d1cd47bc3. 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/TR1591201547.