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 0x6ec4e997a3c08fb1fa32538970aef5c9c04f17866d426056a45652ff3b691eae. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f69ff370-594e-4e8b-977b-63ed2f6e9bd4.json and https://artists.proofprofile.net/proofs/artist/f69ff370-594e-4e8b-977b-63ed2f6e9bd4.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 0x8fc375961c1b22a1091641da1cb810426dada65fad0ad8fa6eecb7dbe7aa019c. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN72403148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ab078ce514a3941d338347cc9b353f1642f5c179a0d8da2ad5d35d1fdd9f4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWZ2509723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a2a916cc63d2c75e69eb134f4a0991712182a5de2f33efb28685cf9524232e. 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/QZWFW2408966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda807baf3956405d9a494e34eb9db363c93b8e82e69522924ceeab47cc1f8242. 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/QZNWZ2509724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b183058001f98652d3f469528f7fa61528e9da34e9341ca97f83639184e7b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFW2408967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88c4b218bef1e8f38f62210d0487e639e0aeeccb9ad2b011a2b103016ce5d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWZ2509725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd8ee1b91a5ce1c0fbb6f0f659aaf27573b4d36f58ae76c238f7b525144c970. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMER2460492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d2f121d479910208e46d968d803fad73f89d7a4176b26e5f75db05f2ae15f. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTB52449500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ac67cf31b3ff49a22c8a92c8f775f9494cee30a3d685813a3f86fb6aa1c3b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWZ2509727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b507113b0aa1754614dede1e27319e24bc48be334edbb242461b0bd5ac2e59. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6Q2476736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4591246eb5220aa30cd09b5a6ed4de026a4ea7cf66f1846d3b96cbdb2bd386. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN52487308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09f145592131edac23cf4ec5dd38ce809890ae376de4439a57054d2dec7a68. 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/QZNWZ2509728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bc6734e2845f22b6f2ef9e37df3db8fb5b87fa95485198c08316cada9c9d36. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEP2486656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c06a2019f1d404f9a7950e850ece2a219f724de782fa202b13171aa2cef33e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWZ2509729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d12167de3bbca1576590eda6703b83c85abb1c6fe12bc8d120a179ff11a560. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7K2474165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83431dd50536512da76d4b06ed5c34125bfdc5f42edf0ba77dcc8652c7176031. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFW2408965.