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 0xea7bfadf1c5a4d729a44b76c09546adf16e6683c3d504b3677cc5920459bf4cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc356cf9-2097-4412-95a9-7fddad1fab37.json and https://artists.proofprofile.net/proofs/artist/dc356cf9-2097-4412-95a9-7fddad1fab37.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 0xdf09bff73045d614dc90d60965a436dd0c151a2ccd5e6a1250bbae8cc2a338e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGWW1948417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c54d3bb77cebb62e59b240ff25fc6d3e7fc7b5da16ef913e0ebd5a7bbb9d46. 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/QZGWW1948418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e77da1ec95f9d2fdf2ad1acaa37d1e907be4df6164573e55ab986a0fdedf65. 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/QZGWW1948419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f1e30a9b336fd712a9d89af5e91e21793f601fd58512038d3cac5d740c651b. 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/QZGWW1948420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984994362259f55c297bed272e5192b6887030c51c28fc29480aeccb50a1d22. 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/QZGWW1948421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3412b5bd1e47e6541d928fc505982c90e360a4be752b1857ecd7bfe3938ea. 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/INO132001900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c01b60123e84162fc0a326c495e46de4804c08362383ef228968298e2577917. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:40:08Z), 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/INO132004072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f096e8012d3ad1bec90a1a34af870530af198abf08ff203c36ee35326795a3. 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/INO132100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0d76f9e4e9385a02a69d423b8bc84ad1ef9d8e26299f1c4357cc42196a227b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/INO132100844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e91235376e9f933bc95ed4ecb1dc0b5162d3b03a27bc5457ca62c74352cc9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMBZ92293199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af9a2cbad826a9e27d569cb6ed14096e94aba5c5122a35893d5b78104bc140. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:56Z), 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/QMDA72365087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7226bb87ce3d31c6aecc0eb74141097852ad5a60fd9e9f2720526505b9d666ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:56Z), 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/DGA0R2422569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4d9ac425f70a3c91f8ab35d622ffc8c6d556cb9602779eef1fd80b8ccac28e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX872547890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bbea1bdc7cbe180a6b68a7aade37aab9f4362fbbb3fc2adce3c874430b5883. 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/INO132200031.