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 0x607028c0004ad87b854c7e26cf45faba9f52c3c0acc324657e9558626f2159d2. 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/f7d0b5a8-60f8-416b-a1aa-a53eb8f1f2dd.json and https://artists.proofprofile.net/proofs/artist/f7d0b5a8-60f8-416b-a1aa-a53eb8f1f2dd.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 0x8599522686f47e475ffc97165807cfc7e2750ee204fcd2a21e0d09546bc8966d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/HKG732407875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f646ea57095042c0f06e6a79fd02d34f64460f018fdee1c76eaea462bf80591. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/HKG732458876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2867cc14af95257bae0c1cac8662bbb880e3e83afd9d645e2fb5ba25fd1747b4. 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/HKG732451134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8944717dcdf4f6ee53960f73ae9754583572151631c162d2a045a9bbcd7568f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/HKG732451135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f5490dfa62abff79dbe9f773ecc2a5469a448c81bc7b4e150f1b3d71b99ea8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/HKG732459402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd928d9a3e9490858df9c0f6066673fa015fc0358bd123c3f97b19c190e0d9dc1. 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/HKE022302996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194e43b2e55deadc38f1f30f6841c5be36610bdace1d285fe6c684329227b1f6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/HKG731403649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b83807bf819d62b03cb68966ba4bd37d9356d443e3407af548423f759cac41f. 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/HKG731403646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a38c186b9663e14f768928aa96c7fd17f8e6732f3d87035108fdaf03375a3a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/HKG731403645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0284770297732f6e24fbecf91086d8aef3c0db28cd93f1e07b83b487e65290. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/HKG732505073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757cf05432af2698873768f409c8bbdda15700866a40ba16880b0a69c88a3ff2. 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/HKG732505074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d4590daa733add63d023986f13ce854daac4ce9191fe0b00dd1b88694626a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/HKG732534425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f38a9c04f5e996025499b40ae7223123c5bdb0c7c15189436007a590a3ee52a. 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/HKG732541071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab333b751006962e90d68a773705de6e38e721652f8ae40996ed35bb09e17c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX282581886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5c053be755dda7d007bb27ca79dccf742f4f810897937329b5a08031d9fad. 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/CALVP2549050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1fe3f3fe3221773f802bd9fbfff0081620e323503c45cbfe6b3a245123782c. 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/CALVP2560632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81618b71c7cc1e69f0b6e98221c4bdeefb9093ff07ffce02f030e6eac98de4c4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CALVP2573858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da6efd20e76ebb844123b49b1bc0af88fa6af6ede9ba4cb17d06f10c702a261. 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/CBEYJ2513899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9e7cd185aa20c3733e1ea21919a61c6984cd3d77b8e098f6fdc4050003aef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CBEYJ2536444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b349a2a247db3514f23cba4fd0cee96a1c4b53e5674571eb50faacdd58fd6. 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/CBEYJ2537166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13617dd01ad5e65679602c8f37d22c0ac72e56ca1c588f197459549afbbcbf72. 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/CBEYJ2546134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8f6feda992c092a675ddb62dba3a24013e94948b8163132c36afa423d4c13d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CBEYJ2549434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb054681477a79a29c358ad2db62645d2be52f30412db6cc733efb68b83db20e. 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/CBEYJ2560889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ccf0d764b81d6e98b56f5774d131e5e130732a895b9fed6f96f982e008b7c. 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/CBEYJ2567371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafff94b01c3f2bfe78d3781053bf303fc66e9f510fb3eb05b6473d3e82131d2. 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/CBEYJ2573946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe819bba8839eb735d2b7c2065cc7a2f0ba98c6f80e577ab4be4278f1c62e924e. 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/CBEYJ2577173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e7370bc61a71d0053e9f91324634d34e40fdfc453b92d1a2269d7d24e9198c. 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/CBEYJ2588921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801139c60903e30bc12940813c6cb85dccfbbb6edcf3be2d97ded77ca269842. 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/CBEYJ2597563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb59a2473a1c20660d8313c661146c4585d61eb26d8d45019fc7e7f71ad62be4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CBF8B2506791.