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 0xc7e9b7db17ad35269c9400e74c4df6eaa96813ce9ffaf9f8f0a2795ddd734087. 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/afc7786f-4ec9-4d84-945d-79a114264576.json and https://artists.proofprofile.net/proofs/artist/afc7786f-4ec9-4d84-945d-79a114264576.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 0x5c770270bcf60dc20ce0ea9e254133d516da89cc8fd8f638e267bd6380327420. 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/UKZZG2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27861e5720a8f00af2c544f4808ea2f115e8c1961758c014c88deabf6cb42eb. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UKZZG2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc64975747faa209293e70b127d2655705ecf9c76ae30484292eff5c04d465. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UKZZG2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9970eac46d323903072271c351be39f9eda6c2c885a63bc356452e5335cd5. 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/UKZZG2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa6e497a3a0472e9cca5a5b98b0c7da4d0c965bdd046838302c0a7c7639ca2e. 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/UKZZG2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f1e52f3254675eba0855c0ef6de6a7f7f435248b1ca4d806bd031d2d806c0. 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/UKZZG2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de0cb799bb8f18d3c650ec806546dce51c151e8b5265fabf8b5cb72586ef64. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:04Z), 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/UKZZG2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872062601e2b9c376377adb3bb832da025eff0e8f147740c8099dd2ab5d6f45. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/UKZZG2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2ac1759acdc4b68fc9767c580206cad88fc564775f8f7dd03ebe8ad2f52f2e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/UKZZG2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda60b173d61413fb7efe15335a105f1d39aa4ebf8445ba2f69beda15a72e9d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/UKZZG2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cdc277594bfab7f0ab0c73105864f9a1fd1cc48551b8e885bead04f6e52ccc. 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/UKZZG2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910d5496bca21cff5ac50096cbdd400dd4dcf45858039170893c68802c269aa. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKZZG2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0c2ee5d0077ba7b319a07eab586efd99c09579777479fa0a7ae199b30d8a7e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/UKZZG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f86e8545a7e168bdeb9c7a41d2ac41409a04e806c13bc50d671fdb3f11a5ce8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:42Z), 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/UKZZG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f86e8545a7e168bdeb9c7a41d2ac41409a04e806c13bc50d671fdb3f11a5ce8. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/UKZZG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debeb1ae4e6c7935dc87b6abd5bffa2b464230a08f6b837aced031177a05519. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0Q2487335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57b93c9a5a2d21ee2bc5157f4e00547ca5d448d8788936bcb5cbffb6239b09. 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/DGA0R2466269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debeb1ae4e6c7935dc87b6abd5bffa2b464230a08f6b837aced031177a05519. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:32Z), 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/DGA0Q2487335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ef97e8e04ca17ec737aedbf554f85d2b3b44ad1ddddbd97d9f4f4652e71f2. 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/DGA0S2418943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57b93c9a5a2d21ee2bc5157f4e00547ca5d448d8788936bcb5cbffb6239b09. 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/DGA0R2466269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debeb1ae4e6c7935dc87b6abd5bffa2b464230a08f6b837aced031177a05519. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0Q2487335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276b8563c74c48c92127881a51b71307696815792c383c2e10b60338954cbc9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR10S2520591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c4fb16cef7270f0ef317105381b3c0d638021dc64777cda92c207fe4da172. 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/GBRKQ2525807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744bac41b51beeb3c515ae88471ee9a8a3f6845d8dd1ecc4801c1461bd45314d. 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/FR59R2582440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276b8563c74c48c92127881a51b71307696815792c383c2e10b60338954cbc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2520591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709af67234a8f9730cb113c4271c9a56f45f5c6551d27fcd819441ed3ce92c42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2575391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d30b23fc7c9cfa431fc0912d19e2fdbfd2a5e489336a59e734fb54a223130. 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/QMFME2477170.