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 0xafa3c6636253b64a60d426a1f8e0ebccdd647fe146b836612acba7c0c7635761. 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/7dd6b711-5272-49d9-9472-6b70be00ecee.json and https://artists.proofprofile.net/proofs/artist/7dd6b711-5272-49d9-9472-6b70be00ecee.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 0x48e1c651ffa6cdbce4b3564bac42bbf4a1de64088b181afc2f9a1e999343ea9d. 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/QZDA61984796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8396fc3bf3e9e3b5b2bffa409141e4179383ead88f9bbea05be2a49e5ad2a. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZDA61984798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0039eae9ad53d6b40605f1e27f3f0dd49b8914c7701d960b958db41cd41291f4. 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/QZNWQ2175848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351181887f22442a8e5a7152173089acc41b8f33a9fed67615b93fb3cc05f8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWQ2175849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e4cc5373c09948b24f94f28c86cfb71501f82337b85bbdee3492854df3ac3. 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/QZTB52363149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532d56b484ee966896e488d78d7e275f87b5f9500e560928b0f5107ae6238a49. 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/CH6542412155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e4cc5373c09948b24f94f28c86cfb71501f82337b85bbdee3492854df3ac3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB52363149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad3def827852f238d3aa5db430bf2cb64fb4367b86f6589614ec70226cf6cd9. 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/QZTB52363150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d58707011978d9d6cb89b9234ed284123b18edc0048628d7756dc3abff4ee6. 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/QZTB52363147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532d56b484ee966896e488d78d7e275f87b5f9500e560928b0f5107ae6238a49. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6542412155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e4cc5373c09948b24f94f28c86cfb71501f82337b85bbdee3492854df3ac3. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZTB52363149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad3def827852f238d3aa5db430bf2cb64fb4367b86f6589614ec70226cf6cd9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB52363150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e99d2fc8d3bf462c0fc6bcdbc03fbdd3b8c3a0fb4171d5cb03b7381d5efeed4. 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/DGA072478826.