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 0x120509c20415f24b8c76d4e2e866ec9c338eacee9695b76ec032e5f3d55f113c. 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/16a0218f-fc76-4bcf-8fbb-eca4b7a4bcb1.json and https://artists.proofprofile.net/proofs/artist/16a0218f-fc76-4bcf-8fbb-eca4b7a4bcb1.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 0xc8617b0a090ead8263bd72fa206e7f94abca6cebcca7491f353c2ebbe279278e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:15Z), 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/ZZOPM2241566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1cf9a965b23df32a42378853f2e449d1308cab5042a1802917fe58ec993a72. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZZOPM2241568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1d15c3fae4fb056086c7a6b83818f1a60556aea466ebb123a6f415b5075974. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:07Z), 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/ZZOPM2241570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5739c9a02b53e3ba5314f37663a4b23aea9047475aeed73169e052ceb269ca. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ZZOPM2241571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b32de900c5e2485beb685684b7b15505f766ccb21bdd9f88e057dd8324721a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:28:05Z), 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/ZZOPM2241572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980b87e312da6484ac754031f340c1ead5250eb55241501b7f5d732c80a0359f. 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/ZZOPM2241573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4052c7d69d9cf47f88fe49bc9868676d15a4af3535fba1ece4e82a186d7aedcb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:04:45Z), 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/ZZOPM2241574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c337ca09c21d3a9f135f74c13f985eba82eeffb8aed7186887097c6b3838ca9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ZZOPM2241575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c81b13884592b42dfc3b60cf31e4f5ba1bf7d15af9350b0dbb4aeed30db93. 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/ZZOPM2241576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678b34f55a7557a6965fb8489a845303bbff256344be6e31ee61e153bd54bf36. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ZZOPM2241578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae89823e488e180fabad6fb84e287f53bd1c3daf13296c25ed20ceff9edc967. 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/ZZOPM2241580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0818d9d395435a2bd732a48c8ccb83be87d809681848462bd493602364fa43. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZZOPM2241582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd47c15b73a99533a2e64d3d418476d28f1d263d3d8d582aafd5be0fdd61c416. 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/ZZOPM2241583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bd49514564fbcfe5cad10b1d0bfd243ba56ee3130a48eeda9b095b4e38283e. 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/ZZOPM2241588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa52f7d49923f89a8a24e49ab32fc28a7617a859bdc51fce95e989f892603d0. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:46Z), 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/ZZOPM2241591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612bbb3fb619041a29ef605d555e603185b3680acc2c578105c46c7d2afdc3d2. 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/ZZOPM2241593.