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 0x17dac2e983e33bed4847d25951726669d3711ad33944b9d54b7b44d9f9dd72b2. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b7de826-4f4e-499b-890d-b8e50588faad.json and https://artists.proofprofile.net/proofs/artist/1b7de826-4f4e-499b-890d-b8e50588faad.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 0xd6fd4453667305d92d09bc3f5ecb4c571b48002c8d02835f5f22e4f56bc51bf9. 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/USHM82237822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9017f96fb3764643a7e8149641dd8853f047398c7d053a061a4f7a626be5f33. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22393324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7a6a6ce951fc8844b79f7dec4e9909807407ce537aef357a070fe1739ab85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB2347918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5466a15dd1b5354a360c5589270adc85d268d7e91a7b145d14de1f4d5e983b5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22294763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f6c0c69abb8be6b2674e0cf8fad629e6cc58e8053ee0cc7d6d9e71a1f497a4. 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/SE6HN2474964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8754ea3834632184f57ae9fc857412664109b07abf78ab31b6a9a3e4de1372b0. 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/SE6QE2375878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e664ffe394b71dc01064b7cf4fb6162bff9bfc36d9ae0fc095059937b030591. 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/SE6HN2474965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8754ea3834632184f57ae9fc857412664109b07abf78ab31b6a9a3e4de1372b0. 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/SE6QE2375878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9017f96fb3764643a7e8149641dd8853f047398c7d053a061a4f7a626be5f33. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM22393324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd4453667305d92d09bc3f5ecb4c571b48002c8d02835f5f22e4f56bc51bf9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82237822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b163853c4059525e1e8e64d8a48036d0a1c4075a36ab3bee84b8d925c65c48c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32404631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae7a16095a6f2eb5c779ac6c6b0a6942bdeec0f191281322e69cb6aa264e11. 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/USL4Q2310994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf74ee422810c7ab92bb99d60409799af0b9fd9fda0ec25060896baee4e795c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2539817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f347e1479c571bbb3bf575045a24b1c3d2918584e52c9f9e1531bbff210dcb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM92120453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc31e3d69222f63bf62aa5e0b3903f438e8342659dd24a7c4716e71eda7d63f0. 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/USHM82234912.