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 0x20f8d651e8379ca6643f4d084877f3ccec3f539befa6bac6a78134f48463f435. 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/f9e4cda7-9af1-4b80-ad70-14b87f8ad632.json and https://artists.proofprofile.net/proofs/artist/f9e4cda7-9af1-4b80-ad70-14b87f8ad632.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 0x58918f7b00a4e26471d5e84462ddd9fb12df9a249bd55f84b18faa80285fb1ac. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ21994169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197b0c939f05eb1ecbd5ab00a55fc837f8a5d2506ffed6f26f9ab0a69a51f614. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKQU1908902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ccc1938d52e8abec46c365f7f5a4cd5fc7e7d7d94c61898e2c911597de5982. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBKQU1908904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee84d686fb672d98ebbd4307a2dd029cccc878babd92544b89b5c5c8dc56e71d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:05:20Z), 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/QZDA72019700.
When You Shouldn't Is Exactly When You Really Should
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc085ef6a4bfc6ed6c9ffaad22f09eba2ac2d8b0177cb97e457a64223dd40e0. 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/QZK6M2016823.
Maine (edited from Stefan Baghiu's) [Edited]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5994271b08edb119b0c6f3e09745a4f5b855cf53a9a6469814186e28dc32fc6b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA52193905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ff3978994953b47582521a173def3b0197fe22fa74657732c1179cbde126f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:05:44Z), 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/QZDA52193908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df3f270930a7b330c623df16063033209c7b4fa1dbc10635cda1eeb6463885. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:57Z), 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/QZMEN2226167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244d9361744c41b5d3e7471858ec34a6cf2b2658798f70eed51db7aff21576ed. 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/QZMEN2226173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fefcb0a51e7318819ebfed8dbe20b5705cdda9a68be29e452a844ade7b2d60e. 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/QZRP52224784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa2aee3e2ba6c7108ae62f57ee2e4ef2a51d6744b6f98c91db8946a0f28a60. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6P2399012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f006a784d56e47dd97958143f5a3eac7d67e0973e6c2634313b9edda5dbc7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:15Z), 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/QZWFQ2400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644dcab64063af5c8b4131f07fb7c8b30a0baa20547b070aa476b908dbfc4e6. 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/DEKB72450554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f5119372c0279d35827c6bd09fe73cf9218efd0b47725d45b30db04881c88. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEKB72450555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539ce405bcf09ee42d621445eb014316e3d8c2b62b87313fcfc8720dcd09a1a9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DEKB72450557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4685f29f6df70cd25192dcde33532fff56e41f29ff55464ce09a00734f3a163d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:42:48Z), 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/DEKB72450559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda09c1ab8e729c9050fe8b21850475fd9d32ea753bf86f4b2427582fa99976. 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/DEKB72450564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7585ef10ce706f5a1cc0acc66765507e598be3f02e7c499e6932fbd1b7b936e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:37Z), 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/QZK6Q2562319.