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 0x38ffac9018c1a17f5ecb35b0ec0cec1c8584d5879579c98196cafaa65a957b19. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c1c01d1-24b0-41c9-8945-c517507ee14a.json and https://artists.proofprofile.net/proofs/artist/5c1c01d1-24b0-41c9-8945-c517507ee14a.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 0x524ce268efd521a4abfdad0bacad5988dd5302c02fa84de28c37fbed5fa3d993. 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/QZK6P2464262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c71abc5eea22d26c19c94bc9d994f92a5f32ef26fa10375b1e4fd7f8248d7b2. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/CA5KR2406326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eafa68d2668fa1f6edd7afe8af9bc00f3c5ec61f18aabb792661366f4393bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USLD91732354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3010ec076553c99945d005d9caa43b91cf40ef34bf26275d300af2e5886b634. 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/QZKDK2188340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514f5d12a84b9fcae1ccd050bfb0d7539dcbb833120270914840a639bf79472. 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/TCAFF2075952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f991f96519438c614c59c7b0a92a43ba81e42370dfc5c1d8cb34683b11b46df. 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/TCAEW2058217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23590fa3ea52279e850466042f771615776ea8ac8fffbb4d4a1f5f23d79b62c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM42K2030081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392b4b6d2edc9f1bb774b914fc839ecbc1cd163ba35c533ecf9b07faded1bf4. 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/GBWUL2035601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472e1409e983b4a318b4da01fe4b04e69f46e93a7bfea5486caaa678b806da2f. 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/GBUM91900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c92e51e8c27f5d74a770a6062ec7836c790beff5c0acf1e300b89bcc17fc8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2333972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ae781cac8213d70e1c3912704817855fa398617d451b00131211a25d6826e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CA5KR2333971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef01248a3377f16de1c4d1a7e5fb2736d363d65bed74c4ca85b56bccaede078. 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/CA5KR2406318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c71abc5eea22d26c19c94bc9d994f92a5f32ef26fa10375b1e4fd7f8248d7b2. 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/CA5KR2406326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b66e549b80e75cbd1b2c045fb21226fe992f2c80f51268f3ac4b80df9b9252. 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/USYBL2001173.