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 0xff2fdef55ecc8ce9d8887a81aa07db61f47122a47652e777e90803f9b8735401. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da57fb5d-d081-4ac8-9ca1-d74022411a0c.json and https://artists.proofprofile.net/proofs/artist/da57fb5d-d081-4ac8-9ca1-d74022411a0c.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 0xc292e4e90c31d28c49a4bbc9ffd20121be95fd5e087ead43c7d32e667dab5bfc. 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/TCAHS2324059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9cb5eeb6aee700822279ea8669dc8ba23340db4e445ce89b3e2521553c4770. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAHS2357381.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fd7ce545600b099c1d54cbd9ff4b72308a658e4ba3c7a511222d303bb34df2. 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/TCAHK2381630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a2a647dfcfb4c1bc9eaad01afe34c7ed88d0f87eb6c35b95fb55d61b852bea. 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/TCAHK2383981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6960395702b4175a7c142697b96e9efcde47e1827825b22214bac4652b7c5c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCAHK2381532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276449984e4f00c35edf9f466b45be979dd91b249e7906d749c39f1e34e0e013. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCAHK2381640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeeab801bb63fdd6990a1d1c807a3b0926733bde559cad516f9ca9749d37b96. 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/TCAES2043892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd9bec00026713099403968058d457345d6b1cd4d7fd0844a0c3c0f84425d1. 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/TCAES2043898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee603fa6cbb6e9db02cb57e67fab1e7114b3708f9632eb9bb47a9d2a695d31e6. 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/TCAES2043930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c5ccfeeabab05ad58d2d7f9b0467d324ab05fc11facdb09464910cc9050dd. 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/TCAES2043936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b50d1fe21162b02d6aa4fccee85d0b4ac333fe8eadf8b2aa3a69865006fbe. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCAES2043740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e029293a0bf9673b4ef218cdb8cad8b891fb657f80d0d35a871652cad745770. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAES2043888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab768023b370479f581b60b081a0608b7491d48203fcb1885af8811e8078957. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TCAES2043928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bb6ebe30878e7e1173c4bedc3ab21d1636560be249aab7dd1bc38e02c74990. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAES2043903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e3105f65027aaf5da7dabe194ccf19fee34044b6a8d1cbdb7e3a095669b82. 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/TCAHP2357812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7fb078066d42de6710355164ec7680b6afdc6414cdc37bf675ba8fd6b238a5. 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/TCAHO2362310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aee426c9f22d1cbc76ad1a40111ab4df61eeee4ca3c6a84ad040571fed87a0. 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/TCAHN2351001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf92939e11012155633e72302f1248fd4d0646a8bcbac5978e7a0b268d3b5c5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHN2334579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5153e8b5e9e5fcc334c14e33b9c9b66c6b7b122191280922b54d0cb469307f4. 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/TCAHM2319782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416c4e99667fbb27352d1472d8dd8e0c410c57f076fb96b79134aa822098236. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHI2393895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a6e0a01fa578007a55557798657482c0905df0ad08ea1b5e94cefa0d958edd. 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/TCAHG2392584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ec7b93b811b178f91a0b262664313234f5382beb04154b2a81515e4b8df620. 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/TCAHC2358500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8f617524e03341a696b422ea6a34cdf001ae6a29cd335a2dff59b685b5015. 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/QZ8XS1903272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaab50ec90c913996f0adcf04533490514b2742d433faa095a3762287f1b09c8. 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/TCAGM2252525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b4e42cb897bf2e080318f30012ace449f41d1b7ef24c851e5723a84496c59e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCAGM2252561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc85b58e57a8ecb8c2df5877cbcd894e5784fd4a6848ea86ad210731e33658. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCAGM2252535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd5eda4bedacd4ce1fb4fe98e7884278f1c415508fa25bf47467bc2b82655a6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAFQ2110387.