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 0xa130e753e103ffce824d8db187399fe444f6063b708a1debe87a5faee89d1243. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68cd7bbb-4e13-4856-93a2-f13c2c612a2b.json and https://artists.proofprofile.net/proofs/artist/68cd7bbb-4e13-4856-93a2-f13c2c612a2b.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 0xc4b109fe930e1b8dcd6658911f51f634e6fa22283806c1963a3c54a346af5331. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USS1N1132001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734e7c0edb7528da4fc4c7c4bcd8be1c24974e6af054cffef377b869783cd8e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:17:13Z), 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/USS1N1132002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6e5ddf6cb4925d3b5585c4856518797499924e47195f19eb4c7a1dbb61f2a. 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/USS1N1132004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88ebea9e96803077283fd7477c64b89aa512ae4d645defd7832e07197fb40c1. 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/USS1N1132005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe423263cb58595470f75bc0896151aa14c2e361ec861f4ab06ea582e92ca05dc. 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/USS1N1132007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c72ffe7937690fb7462dbc6f58c2bea2e37a46a82572b7e43d0224fecfac58. 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/USS1N1132008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c596b4aac2dfbe5d8daaa02d847ae03ffa484eba358ee8a38782b69ebf2105. 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/USS1N1132010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed48193be6353e23a13f4139ce051946985273d1b105d0495402236a705103e. 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/USS1N1132011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2589f35d65c522a7f43099b8a0f1a823509375db6fdeffccc7ab0b11cd94b5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USS1N1132003.
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 0x8082303eca549e038680acbd9d52a70855620dcae672fec7cfa847f9f25b4938. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USS1N1132006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc816aeb2aaa999cedee5b73c20a42f633b41cf53c6a8d6f5760f7167bd19dbca. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USS1N1132009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467de18aa40f43b97a7591f5bf91fb1d6ce2574ba9df1b377ad0b803763f65e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USS1N1132012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b5b08207648c4ea13aafb9521294dd7b86054b1903b94aa27f326b7567c87. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USS1N1132013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48414e7797642818a3686a707589b8a7f6be05f008208a43bffb237afa07bbe. 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/TCAGM2252084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acd7937c85f4669ec594de22414aa5ef78df73c0e1fc44a02bbcedde6d45235. 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/TCAFS2183987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316c7d10ce3ff6208ac4ac32428e2924c19bb2045a38beea5c68885a1ca18f1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFR2144712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b73177d1530638dc3b0a9cba9db574e9de6610872215ee54e84f837fd8f99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAFC2050874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ac78a143b8686e696cc8a6f26832439a0d22504a21b222362526cc534791f. 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/TCAEW2080942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead5aef92d473d29f9fa9459940e7df7ce5103dae1cf0dd37a9ac337cdabd5c. 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/TCAEP1916728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c17b1a7bfa068025639a3c1cc752b4bae9067e591b5e16596574de5abf06594. 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/TCADX1868553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abd69fc76374ec8dfb0c300b42384fc7c00158bf9fa19cf44859544c50c7193. 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/TCADU1874842.