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 0xecf4287e8bba6ef981df611408f9832ee4a60f447bfd508148ea2331c987e70a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27a67087-24ca-4a36-aaa5-028115957d39.json and https://artists.proofprofile.net/proofs/artist/27a67087-24ca-4a36-aaa5-028115957d39.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 0xc15e738df7e1e3903741158c14004a313c00713d7dada98794736943469216ef. 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/BELE42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c55c5a319322a398e4fcb3feb72e585a56a01b6c5ef24e895b03666dd45b06. 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/BELE42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14eae5e3360d3ac8a3cc6f16b16d599b414ede60a8e774edb5ff12bb671abb0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/BELE42100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e1c522f9ad189edbc3ece83fee14ca5577685a6c3fab735aab576a63ca1e8e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:53Z), 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/BELE42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e6d65223fe356036a91d572a839ed8d073271a4404a7a64bbcf3b626b2288. 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/BELE42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ec5295b86813cf6a2bd2cf14b6fe71368aa4bc5371a1a9bf4be5029812a77. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BELE42100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f521e3b7130fb7fa46d33b681530184e5f0e7f11187cb6f7c35cdcc9dcdca6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:35Z), 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/BELE42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9becad1b18d3d905d6639762f4481f36a29bda65950d9716586037d9363144d5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BELE42400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87600ace9a7a4b6e4a4ccd3786c1fa74e40cebbf2a70a46459314f904193b41f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BELE42400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a032b0f0231156b18d1deaafd37947c2f5d192cf15a5d45a330f1d6658a78e. 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/BELE42400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473864e2e5ecf45bc30eb079b595e7bc68b5412b77c04a7b727e462cb62a9cd3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BELE42400015.