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 0x707b6eac8b0e1c639a3e37fb10661d1000e258e1256249a05e1419ada4c3fab7. 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/d53d3c16-fbf3-43e5-8283-78af3d00e0b0.json and https://artists.proofprofile.net/proofs/artist/d53d3c16-fbf3-43e5-8283-78af3d00e0b0.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 0xf8c4a8d5a01c71a8ca03a757d50c425a2f5ff2b998b25da742f36f06beb6c4a2. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:25Z), 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/QZHN42066789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c1f8b3fcefdc2b7a5d7d8c69eb4d7a0263a05a3b7b4cbb8fb2236adb66463a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6Q2056137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ecaba6093c33b3a7cc641bf0fc3bdee8c3419a1688ef7fc3b17180f1ed22cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2086714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eabfe9de67fecd9776414c205831ed7d90bcf5dd6b697c333e457897b6e5b59. 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/QZES72122421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f50571cd288524f487020a51c5bddb159d8ac32ee65b8396750327e82aae03. 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/QZMEN2114340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5416b530dde40d970c7d6dff86e9ffa57e7c21345b5ed026b4649a020b1eec3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:38:03Z), 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/QZNWR2118435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6bc0483d79ce4d67f962be49d68baea9139ff1b483fa640e5cff611cd4614c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:31Z), 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/QZDA82228942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b8c0643a3186e7f17d4d5a7da2b3badf745dd244e7a0a3a12ecee8b0c89b4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWW2223317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3092ceb3125b8b3aedec4364688e3e53ed5167254d66b111591158a29074f723. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:35Z), 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/QZPLS2214834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe006357359b30926ba72c06c53e394733beea877d4b0055f4af3f24cb14f9. 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/QZTB62276584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4804fd98068030bab2e2925111a439ed2bcd35e46ffd48f80793b33c7c6a3f5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTBC2385118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df43d65080f84da58ea1f7d0483f6661d52643517534e0c3801bd2ce30ade40. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:57Z), 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/QZWFP2323810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d942d6e052267dce30fef4d96f2d3dd575a88cdfb5fc1b74ee060a4a8e083. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:12Z), 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/QZES52459259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f007889762fd94243627b329cedb9da3782da16f9f74f32200fa2e274846a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES52459262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb602652d01b8acdac177a2c4678b7f8d65852522cb664988e859eeda21888c73. 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/QZK6P2305172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cd9e47ca27fcda077a511c11198961057302ec0fd5c4ffeecbbd6d3895e196. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMEM2406830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966e30c0f3646dcb3957f054a2fa2de613eed12fe520a7d9dea4d7136672905. 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/QZNWT2431866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a377d9409e91ab8175b902e13ae92d81ac2c5490453b5fb16a712071aae36a. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZTB72495689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605aa8775862ea28d2c5f8d92f576df4f5dd742d1854690792789df9cd164d4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFQ2482420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e69f1d9010602565c59b4eff73b2a508b756114ee9191196feba54a8d4cc2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFS2453625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22321f2e42fe71f8c08ca87dd46199649807549a051893973f308694883567a. 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/QZZ7V2439886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea65ca1eb51da9a3944d25b64c3404018a629d777df3c4766c30819d3fd41b4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFYX2587162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee84e9633aeb7d113e30d7fecc7cbd0a6ac018b413fbe2ffd9458827954d0958. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ32562119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa113727ba74f5016ac8d5fabbb2a3832d10a6bd185891ec710e379271073f4e6. 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/QZDA82586888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d846c44abc14db3e6cae85225160b357b21bdd1bcdf547308087d56a8db08c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:24Z), 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/QZSYP2598552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291dc7638193a8cbc98a4200fe560bbe55852d1a789b6ae756f865f2574ddc10. 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/QZS7J2513731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad42bae2bcc2a773c93b591396aaa964da0985f080c3ba97a63fb8af0bf82b6b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA62446862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403fa575005543fe9e262d6dd7d7b283dfde0ba340799ec1746a21cd62665559. 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/QZWFH2406094.