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 0xa2a4d06dbf993d5ee1594c087ce31bbcca4f9c5da58f5f2c698ab78c9a2a783c. 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/a8a898f1-46eb-4d53-8827-84dc0dff2db0.json and https://artists.proofprofile.net/proofs/artist/a8a898f1-46eb-4d53-8827-84dc0dff2db0.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 0x8fe92d97ec433ff06f1ec809225c85ab053b1f10c055cfd410ca0a0de8d60860. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTAT2386817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2d2253878a601906a4dc3ea56227a9b980f66ee6f63b6ddb478ca1a6912c5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:08Z), 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/QZTAT2386820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364aa5a81520691985d2191b9b8c48a1f0e8cc001a4e31291ad10d14b284dee5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:42Z), 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/QZTAT2386821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998d22954b4becaadcd8c7b238b0da77e095e43d6e01723b64700a8ac4b3e54b. 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/QZTAT2386823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6b8e8b22df26349ffb2520dee5185fc009e4389545aa04634362c70f69d0b2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAT2386825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37d7e01da87d0d959c6fc0ae8702d0d3b510f4ecf020daf361a71fcf48c33db. 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/QZTAT2386827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242bbc16f80c773b13f52fc3897595b234ec8207387cce4cb57944d169e181d1. 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/QZNWZ2393225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a630277dd8703803b3ee22c434eb18e8dd8ce30751e6bc08c4ab3be2d80f206. 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/QZTAU2300361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b619d0ab486c07d2bb86df64068283c0a3a48b25dbfa0492d12de908cb613. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTAU2300362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80417ae2a010874264db8686988bde6044e46e3c235fc0cc3ceace412e5d2d1f. 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/QZTAU2300363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9aa29eb2e36ab4e9a5bc205f63b14c40ccb83a6c085e1c7cb0e599b2a015ba. 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/QZTAU2324360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095bf3adfd047264b3821b21c1e632a273e118d2fa5133cff8bb5e824b048b49. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAU2324361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1247b66da11a9e826d0d3a52b0cc7b9f981d1d47a913bfe2bd2efef690b34d8e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:04Z), 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/QZTAU2324362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc79841b80b29e1d40e29a6b3d86ea23c5b5dff5fd6a4eba6525408fa706f26. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:20Z), 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/QZTAU2324367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e47024319bb9dc585312348c1d533357a98a13b297b1241dbbd636f88d34b06. 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/QZTAU2324370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e46c6976ac3ee4404c23331429a7eb5edfe2262dd32dc5ee23c6a612724b7f9. 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/QZTAU2324371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02303ece060f7ad034fc56f3d44a2256e84f6cc377893cc2e00097e48ab6afcb. 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/QZTAU2302184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60507eb7208ffb9e8575bedb4c692e90765a1e4fe57a644e08552b5330ec4abc. 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/QZTAU2302186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3a7f510d9a29360cfa517762439428848c264de2da793b62c9a97b2b9d083. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTAU2302196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742591e672aadf9a80e4be9e91f16abb49f84732b6fa47c36db12215d3f455a6. 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/QZTAU2302198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd019268aaebc9fa94df47d7a93077e2060748d342b4b8e09d6f6458eeafd479. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTAU2302203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4d018dbf298941031b7e39c6191da7e7b4ee7c020c2f4291dba9fd82cefaa. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZTAU2302207.