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 0x9695e850f19926692fe800d95d258109d429f8d5fd13f1c367231968471a787d. 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/424641b3-fd29-482b-87ab-68b21b8ba93f.json and https://artists.proofprofile.net/proofs/artist/424641b3-fd29-482b-87ab-68b21b8ba93f.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 0x53d245ddb828ca38a8f3c0fedc0ff5be094ecb035e84fdecdb5358a6e5794a29. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QT3F42400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bde6bdf01f97ab4b47e58eb51caead053395c1718f3bbdd3dc80b843907417. 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/QT3F42400618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea3df1f9e37dcaed32c72bf887cf28a4a4ca7772be44d25802081cedd7d9575. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F42400620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0c0b72eb4cfcd8fc2d81fa3522991c0adc5ea33fdff13a7b841e80a48da5d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F42400622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838582d48d594d7dc4b8839a0ac9fffe4b27b1f6792c806ac9b6e404291f6674. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:21Z), 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/QT3F42400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b14c5a096d7671b85f5b53f6446fb9b520361ff1eeb4d1c49d2880c834a3c48. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:43Z), 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/QT3F42400627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93720c24dbc64cb2a7d0e8530f2fbd665d97d62fb50c9710d30b1bbfa15bb14. 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/QZFYX2552146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d45b24194de2dc04a454db556cb11e1c774419c396fc5737fbe5942247c9f59. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62537491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062cf4e1f801547f2ca39c719378680712d84e5f95034dc056a46c17e78194d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:27Z), 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/QZHN52514263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7214f73ffccc334fd9b56e3842687378f4a99526d2255e462825c3a4010f9149. 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/QZHN52514264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2922068e5c59503cd0099269394a6fbafb52f4606ec3a1b5e5a0182a20d05991. 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/QZHN52514266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5197b90acbecaa24606f088214f503bfc6002ffbf34558bd2494661c3bf56060. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN52514270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4127b9a9810ffe5992688a059a819fab1e4052459bbebf24bfebe6965b51c0. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/QZHN52514271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b106a690b5bab353f477d9c4127d87d0f68fafa83205fb521bed2fbc844e52. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHN52514272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd380fe8d72a1bffb02fbbce5b20e9d1b7292bdb12188bde5fbd3524eb604ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN52514274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd34eadb5cc1e21170bf0a304bb321102f7c4c57cac38570f0a0f4745171bdb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN52514275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc56d66644e21fa1ca64972fb77bcdbfa6cc2c95b9ce0b1bac85001c9c813ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB92538555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f34f9b795c570b8ff572aee4f17b097cd590e326c9279e0bc3f732e20e7510d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3FG2586151.