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 0x58bcabb1fce6ff64be632604993223268532bb919d87f144f8b98055057b75ae. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a8f4d3b-dc27-4c10-8ec6-bd14a8a4c413.json and https://artists.proofprofile.net/proofs/artist/2a8f4d3b-dc27-4c10-8ec6-bd14a8a4c413.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 0x66a268841f13d92d9dff2da9cafa846e353015c7783f009eea99b45c1450cdc0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHN72507754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbb98ccf34e1fee8c9480a2eacdcb839ea3f49ee1efd6826d161ce67b0c948c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:49:25Z), 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/QZHN72507758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217cbc7e84689fdf5fd400dda893450e56bc2a3d58eac1cc41743692fed46f77. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZHN72507759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa151add7e3c4c46a10626e10c4bd0ad9c2a62eb3a6c9e3f6da873a1d8275839. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHN72507760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799cc35a13f93297895af3a6595a037104d0f4ff0a350005d5ab9d85a1118a1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN72507762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee0dc2132b083bbfebb50b6709267e2fdfda8b7b0d91676afde36c2eadf2a98. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN72507764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf782dbce4ae6730f9157ec9f716750437be445a0b96b08dc596bcbd3620ae3b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN72507766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f2e5f905e8968d4c9893f594e2de48d264230ef4d9c88c4732dbc77c5808a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHN72507768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf08af3864b7800922b9e93feaaa21bd190560b656d919264deb2c1f9d3a25. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:55Z), 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/QZHN72507769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982d2bc623a354f5c1ef32eec12f2545be2dcc86f548c908fb583767ef2c859. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN72510353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aab7be5fcfc564f089b7f64a2f31a2e4a074ce85cd40f406d8ad0f3fb1571d. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZHN72510372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d99f6801ad2095d3158feee1514c9581c72220b73c2020c2b2473ebe2c793e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN72510354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc39c680ccdb4db283b5888f701e2e4fb8c7e2d4df1b30799803f5341c3dd77. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:17:28Z), 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/QZHN72512738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcacaa036173d8a9078ef55ee27847f0fd9e6e0e320a5ec7d2296dc425af3c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHN72510355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a51f49da2cf135c88d88fe5fc3e25952cdcf871dae2e7fedc31c174e9d2eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:12:45Z), 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/QZHN72510352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec081d0053084d0659e1a58283f8bc945a7991365712fb0e7656945ce49861b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZHN72510374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60b81be0c3c5b5b4f2750424fb127c7da4c1582073d3a9f231d3d54c494053. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6F2585629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2736ddef41b089e1e64d39e924afa9d6df596db7ebf53c28e7dca94ab8ecc3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:15:48Z), 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/QZK6F2585630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35efd99823a808bc50166fc522890d5ac4941d3f3cc02ebefef02587e582a724. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2585631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa08442948caf16387ba8da4d4eece997ef0881d68e95b3f3df1f18b5fef3f9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6F2585632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00343bc152394b62721464df5db48650ab4e21ec5355bf4ad081039a053bf5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2585633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b9c3cd6ced2428683e8e534f6bd2e7227d964fdf8b2bbebb95a49aeb165fc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6F2585634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb20a462514f2f05bd0ca7f116e7ff2862113e83db8e992a74e72da0abfb79. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6F2585635.