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 0x441189a2ef62a91800e8d8b8ed167ccb9f61957dd2e7da5588f4f449c0266c20. 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/2972ee27-f9b7-44c5-9a53-1b529a97b569.json and https://artists.proofprofile.net/proofs/artist/2972ee27-f9b7-44c5-9a53-1b529a97b569.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 0xa544fc006a349714d55dae3994571f925d7b23d960cff3053437ef5b3565022a. 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/QZHN82382066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080ebfa9d80ed24718aca29078e01eba9f5101de77d03f9fccb905bb9d322579. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN82382067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa30c2dca9223c00e1a673b03ccdd889db0014164a8a91f55ad70f266bd0ac6a. 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/QZTBB2448816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c59c24899cd39f0744b6b21fa55b3844903115399dc30f775af61aa862c5f. 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/QZTBB2448817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b5db8359daf6553b64fad3ae9c12606fb7a960bf5986baf092ecd194dc8f67. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBB2448818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723ceea3e2aec224f65c9163a2519fdc53a6c986adf61f45dd058099b22e1749. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBB2448819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c6b986a421ab6ae1c188cd8897f916d26d1d6939bef2c33d56259795f44e9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:02Z), 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/QZTBB2448820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2985f9bd034fdab2fbd972482a539cd030142fdf03938a9201caed6c8ba35d2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:44:41Z), 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/QZTBB2448823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922cdcae635b72ab1cd36c2ccd07253ca492c97e3f80fa782311444f7109d063. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2448826.