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 0x6e5c02143d1f7578fae09267f6458ea552c4495fe87dd22520e5a19a09d0d442. 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/492dc1f1-22c2-4a1c-a8ab-f39146ad3dad.json and https://artists.proofprofile.net/proofs/artist/492dc1f1-22c2-4a1c-a8ab-f39146ad3dad.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 0xad66f38439fc8765ca7f95f26e72f0d14060d677ef1b4a399aa4fa9c2af93983. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZHNB2391978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5852605e75250927b3113b4e804a89391b4517ccfaed6f3c62ec16f07e5c4. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZHNB2392006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576a9df3092fc170ba3026bf79b82d047632e7708b8ef27d22ae583b12a3b5dc. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:25Z), 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/QZHNB2391993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01833ae99acf4dfb5f00ff0a66384f143171b4a4e31625fdc081ea8cce172111. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFH2346953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f23fbdeca4e655daaa1683ffd0203b0f907bcaf4be3286d8232cb00f89353a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFH2346957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8bf4eecf0fa0fe3bca6e963d81ad5a8c8aa8d238113bd79f8f9912448aec65. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFH2346958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa356333fe3fca4e40a885fbc93b1fe775ea99216fe826f556479e2d756261b51. 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/QZWFH2346961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427c7aaed57972610a1c19b799316a1d37503fa829fa16f5516b6d06d46cf28. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:35:46Z), 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/QZWFH2346965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ba1f9a78c8c6849677f5fa7d62573f4e216180fea2cac53120446dd01c77d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZWFH2346968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879cf290e05c9693499c7c46024b47fb8a8b8a925b9ce6f403952f2d0be8ffd2. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWFH2346969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b18438d1df6c7b30f4a22daac8838ec5ae2ea18ed34fcaf47f39cfa5b68c82. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFH2346970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f0117f14b972a62cecc670a379c000d7fb34a225ca59e25a8936ff8615c45. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFH2346971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e5a95521df6be3933e7988e79cc726bd3b00c170e8a14ca8cb5d73a7723388. 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/QZWFH2346972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f0782d28ccae31af5e67335ca4ae1757c71e5f3178d4cccef3c039ab018a7. 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/QZWFH2346974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bae8337d38520a5988120ea27130ad585aac16d510a93f5b410e5a69da7b6c. 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/QZWFH2346975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e6fe09c4315679ba9258e56a1abe9d5a9e6aa155577d30bdfb3e1becd4e00. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:10Z), 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/QZWFH2346976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937085b63c6ed947f097245a05f1e8da2208fe9315b758c3c9603ca076fe6b0. 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/QZWFH2346977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337ed3749d15151b7f5b955ecf58426eafa9f5f3833935168046ae26e914869. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:26Z), 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/QZWFH2346978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef0ef26294fed18d5dbeb9806a5741470b138f0cd7a148c5e7eca80a555947e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFH2346979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b270e9035bcb82da84058f86f088f22daade3a5e65c69005d8aa78aea60ad8. 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/QZWFH2346980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615239023770eb95c2c4f04a8626962db422f5c5820d2a2be3590fb6ce0fc38d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:22Z), 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/QZWFQ2307898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f08a1120a276803d1ebe2a7b38ac3203ece867cc76cc7402e69565b7b0376. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWU2400776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc007b0a94feb0e81f80ac0a84d221952636371a2e64486ddbbaf39f290a402. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTB72479712.