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 0x844c947b9d403a9f5a98be7997df5b3250a89027e54f3a0eb3067cd1948378ee. 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/9bc61ec5-da25-4deb-b613-e40844587d83.json and https://artists.proofprofile.net/proofs/artist/9bc61ec5-da25-4deb-b613-e40844587d83.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 0x1c4a489684bde14a9949836d4a990e17d186cd7eecbf0d4d7f74567e8c7ac960. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SEXCH0150802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10549c981064ebb77ab74ebc1aea1a29caa2016d1f509979c82731ce8183ae9b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEXCH0150803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990f7301eea11140719c9e798d41d81def6dd6fea1fa8b2db1e90f32dbc678f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:34Z), 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/SEXCH0150806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14119e92f1821e86e1756f76d6be5ab65f86153769307b89045868966d55f25. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEXCH0150807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc58020240dd311712504949721b3ea4a27dc18a96b1320e7b3f3769dd8ded. 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/SEXCH0150808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05a1636ed7c0f5c434cab78bb5b92bc69531c01a74a63e3bf8729f37a2c446. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:17:04Z), 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/SEXCH0150811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce113c434276573d8c01aebfe0c93d27e0e47f3f1b1fb8defed3535420fa08. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEXCH0150812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91989b6c51867378c7767f5a984dc9ac213997e2fa01a305a7df444a340501cb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SEXCH0150901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b655f93901f905d27367051209fed49b0cbe5ea4535de70e12b3e9d2c6c623. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:11Z), 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/SEXCH0150902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910216c7fa6976deeed0348a43bd23110bc061e7d55e86c5cb0248459bc4fe0. 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/SEXCH0150903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02adbd190d86f418e07f1f451cfd0f77d928f5fd2fa720495417063c9ad9a8f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEXCH0150909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a3f5b644fd6c8e38039a8c3fc0b8417da42354d9bc84e7a66234ec8353a93. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEXCH0150911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3342213c6fe2176dee38cc603c090b39d4d14f442c0c80dff7916b94fe1998f9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:16:50Z), 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/SEX879970001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6bff3da1693baac5e5743a4c7dc2eb62863442a1c9c370dde976419bd2474f. 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/SEX879970006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606b3bc1ba407d00157b027923fdbcaafc24f92c2f713fd5f3a65c8e724d9aee. 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/SEX879970008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97be5eef287debd5a165706de54064708e771ae0a5a81fb002444b2098d888cd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SEX879970010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b3b8e2314852534b6ad72065961ccebf9466856e7314a3beb172f64c89ae82. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SEX879970012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43713aaeda19d986c16e347e91f583a3b29344ea723de74643f160c64751cd6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SEX879970016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5bd805c600aa8df2c9027b4c028874eeedefd773fd10d73890d73ca7a7c4d2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEXCH1801101.