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 0x8931718d34c6359cf9c87dd16b5e71bc6238c1f285d539fc34b10a9615f99088. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8481f6b-76f7-4bae-bd9a-f7efdc70bc71.json and https://artists.proofprofile.net/proofs/artist/c8481f6b-76f7-4bae-bd9a-f7efdc70bc71.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 0x3f78551acee3c8b628f50d2009b53ab28da97446e1b5bd1940f0420f6af580e2. 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/QZWFG2340640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657374107d2678b1c8f2862c36b795b5a7763f57eb3c1332ab81f5b72d617259. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QZWFG2340641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d648b4c2f78c3cb2bf93b6e4593ed34d9d7460c2ec3e9eb6a3cfe27e6d55316. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFG2340642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d241d2f4958724769a4dc438448ec85e78c885bbf4182bc8e82f5b21612f526. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZWFG2340647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2078a9cc6e591720b1a8c4fb40eeaecc014580f0dfff2689bc8b6cb1bd3fdf3. 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/QZWFG2340650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1e474b28a0f3d2eca4f105fcc6528c9aa6dc9edd5c7cf75e75a172db242ac5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFG2340651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68302eddf593815c26a3cd624bf50e1fa8241ce13d1e85776ed9b74d298e9bfa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBRKQ2448523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fac555b8fa6729aa27d4bc147817b4104fb83a85e6bb6bf2d68a4675cda34b. 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/GBRKQ2481889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864c88c790d4f60d0984420f7d1f0ce7557fb52b41a9b6ee2071226f0c411f4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBWUL2466144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6368add5f3e371dbb88b355476be727c0d0b0f15b33c8b215e94cd78bc9b3fa8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:59:35Z), 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/QZTV32447863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee2db00e31fecac557b66f172bf74f2ef7f3aeda5cd6656771f5ab48f0fdd22. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTV32447896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06461ba2070fd2670aeccdeac633d4e831bd1db4c57137dfbb6602a812ba1bc5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTV32486625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e7f4f3143153758bbe6626061d5b3f439af7514861846e577a49ef41ceadb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWDD2452693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f936d76fed391da04ca66cf244d86d0c1c245e39b9278ce435d8e746f93947. 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/QZWDD2484635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d84ce06b57d60d99aa44e1b8ca54ba55e21ccd9d78440452c7b2f7cd9e3fa. 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/QZWDE2406958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1acb7ae337d4a5c4b252b8225e31d62b5951cf099d40944889642ef7b32996e. 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/QZWDE2407027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e98cdf29e6255a18a4c697b2b47eda70c7246d6673647f39091b72abbadc39. 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/QZWDE2489082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae75cf2447359643b637a4c0d25d68e75d90bd00549d4058e2a57f5c18566f4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWV32443701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93dad96e39d19685d451053e2fe24f1a193075a334312a044e53915c7ff5d88. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWV32493523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9a150d08d338daef64a353062c901f3510500ac15a8f03e98d3be0ef56ac6f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZZ8A2418848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5587138b82ef5af4695b0d7f0fde1d17ffafe69a4807aa07cd395d6b43fb8937. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:35:39Z), 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/BK4DA2503256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a33323be47c10919abcc74c7640cec26fdae3505a2970e4e735732448872753. 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/BK4DA2503257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb071f8b266a1135883ca49b181643ae8409c42f2021512d5911e0f7eb4d059. 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/BK4DA2503258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430e6868c97e32d34668d13f784be5e132495e34f42dad1e7e7b643b634b5110. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BK4DA2503259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46916c6c146ea4f14103ee2e1eb2f4cd3eac1156bab73dd5d44546645c0df8b9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BK4DA2503260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7998b01d229440d142010438bb8da0d8049cf7b7a439c40b01886b0a8eef5cd. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/BK4DA2512296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174d2e2e94a790a8a1e1c063614eb39fd0390d62d40ed47a2ceaa9abfce8702d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BK4DA2516435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b27b97b379935c6cf6a1e80c683ed9259fd5421303dfe30617811d4b645530. 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/BK4DA2521093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a96eaf50f12e405bd8f24109c04df75f332d5bec736321d5bfa01702051e351. 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/BK4DA2524586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7190ae03984a50ab6fde2c565b4147040e6656362059e7384861ed61833af93e. 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/BK4DA2526062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91595904b7d493535265aeeb531774ddfe453273d62410ef389f6f3b9c09c44b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BK4DA2527338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea9232024f11bbc6a6c5b81d570ad3abe1583a75bfece9091de8272aaf35c83. 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/BK4DA2530869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ffb02e970941849fedc9b94d1ff4cdcec26b4506ce80c90cf007c0a52c900. 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/BK4DA2549385.