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 0x995923a9d89a564577b06d3d516f81be5d7bf8be261aaaacac48b03a6b8e7dcd. 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/e74bebc8-24ab-4296-bc1a-394a11a4eafa.json and https://artists.proofprofile.net/proofs/artist/e74bebc8-24ab-4296-bc1a-394a11a4eafa.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 0x2392d6d2365c44621570d2799eeb747a4fd314b3706d6f6dc354b47f40e0a0a6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022290203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056cf5b9ccd106f8fd5f53c2798cede8d8f4fcaf2edfdeea8405fc2981c85ca5. 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/GBKQU2143673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14df0683deb5e8544c8a2ab1bc2975e4cb17e410bbf5a7949a2f7e83a5c7ded0. 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/GBKQU2143674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389066664b6ab68d2a9e62a58151bce21e6432cf31061e4fefc8901045875265. 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/GBKQU2143675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fdf1986d69eda187dcefab23ae36145d8532fb02f26f20b455b73c65f2bd72. 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/GBKQU2143676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9689f51f3c9dd525e2659bff6c68e1e4f4cd23387f2aa24eafe6f71b21bed. 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/GBKQU2143677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352c9799a75bc591355a5c37835e421bee3e0213e1c9c0d995882dd1ba262d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2143678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c65335c0e14d8814f74f8a3ba1a2bc3ddeaff00aaa4297bff981c242bb46d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2143679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5485726fc611d0e2e9b8744e71a6887693a98e225ccebce53437e69d203e7d4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH7812372070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c3fb30561ccc3213f9ef38483ed097cb9504ba608d24f63388e8bc93fc23dc. 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/CH7812372071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8a9fe9a3ad7172598da5de1d675a50137e800354dfb225eb8ef33fb355afd. 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/CH7812372072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c8e33428189ee93bda34ad67b612599151c4d6220abacc69af44511417f1bd. 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/QM3DF2282191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8442b14ea604e1a36d4a1eea17c3cd44959558943a37022f92ab7833202e77. 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/QM3DF2282192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda66ab83486992b3e95dbf085a901ebcfdb03646da7ad7d74422232cef8cee24. 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/QM3DF2282193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17444a58895b1da188a9f511c5f308db0a22609522092e65741b528d97f6d099. 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/QM3DF2213398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7dbb2edfd2d199945b60149e9b6b2fd1912dfba70c4122912258cbabe251aa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USANG2241364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb810a35684f11dcb53b12e61d5803072012fb19205a5f5cae6ecd6bd70f1dd. 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/CH7812224888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3560d847bc9075c8b0d47d0abca3753f7c963487c499ae58ae4762d7bdbc102. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:25:18Z), 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/USANG2209968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fc33298d7116decde7462f7eabdcf6e519ac8db97d7804a053e7d94a65b9a9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQ022290202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b25f6ff6aecbd5ec7c6f5f17ac65800bc34899530ea73b760846a2e582dc091. 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/QM3DF2160933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df31902b6f2d9d3f9a792bf79f0317d7252876a3ba53688f12e7d0fab60004b. 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/US3DF2140177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4c94fac6d7e9267f9d3678ba5db01249355b14a4aa7fb0e44bc6f12c69e340. 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/DEQ022011224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d84911c3a8af23cba44a9d9f92d05d9b14053971a91544b1365be6c36c44abe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022011221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c692dfb9b8dadaf52da930122a4d9135da0adcddeec34fa3ecb1224b4d8f2. 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/DEGC62002285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4671e93e0313d142a544ed72e5339c3f25f3f0110dc0298ebf16d9a81e7fc285. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEGC62002287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5736c6edc3eadd0f3189d3cf2802e5885d0069ec43348c1f30949f81437a01c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEGC62002286.
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 0x5217a2bb45491ce540469847e7c5d4a46b161cced23d513dd91e333d7afb56d2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEGC62002289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb45077cd1535a2adac311babab01f217dcf89859a6d42ddb50f20198ccde4. 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/DELJ82012155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d12893e6fda3dc705641952a4cd4b5bfe2d187b0e109193a5fecd0fd65d09. 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/DELJ82012157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe75843f56dbbfa64d9c4828658f2f2c9365b47033dbadd2f463cb8a5d41e90e. 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/FR9Z62000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa46f281c36312c5ca531c0cd5c10b90637056ad240b9a954b6b853acb0264d7. 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/DELJ82076145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0918eb76ee8951400a962f8fe801bf6b37932c4b0114f9623ad7131621035f92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV61919645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a594135ce3a46fe5c1afc7b4cd44ba1eb6cdccc165319c7baca8d5ebb345ca. 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/FR9Z61900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7162ef54caea35f245d93c41ca5d617cdb2fa14f50e5249cfcb0dda59629bc4. 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/GBKQU2199401.