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 0x34b1cbd1786ec096701445b9e713348361bfe66c8c6fc357a2b5cf84a1f5957b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fba62c8-d94e-478a-8c22-6ea39b7dcb6c.json and https://artists.proofprofile.net/proofs/artist/4fba62c8-d94e-478a-8c22-6ea39b7dcb6c.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 0x621a93cd0ac68b48815a83d3167dffc3b745d5fe96dbc9b9e7ab0fa5ed3c2518. 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/CH7812400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149ea637ae94358214399d66679ac18acfbf1e5c42c2071ed5eae1e7feb64c22. 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/CH7812371420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098c99e31b119760f0bd29fff81797d6474100be47e99707aeba8818d529687. 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/CH7812406695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a93407f9e97ce203d7edb6694c9c7756a02127c0f1ccc3fa7b2487896c6844. 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/CH7812403644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4f20934b562a28c548ccffe72e5befb4416907d0b39d97ee8a5c9afdb9acb0. 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/QZTBD2342680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e36f3957a7a0f0e109e0ec38ffcd4d09ae9f70d3e2cc8f1ee185a197cd74f. 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/CH7812358815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2ed51e2f8c879e191f4a45ac3e3b17f858825c3c44ee42a80b12f9a6f5f0ca. 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/CH7812358022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf429bb032b5740a2e95cc5bfe8a7efd69bce2820f232c46d341273309f65a86. 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/QZNWV2308826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e1e4b8ad1ad495bf4893a1c3a347bb6fa2d2597f67aa3f0e696e558e476304. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEP2357316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9711e3af187fa0d8a607d98489bdece659e6a46e12112a6f1d93b2da8f47e2. 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/CH7812346043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e957131f8b9129663aa6532fcadbf4427fad67c08589e62625b291e199106. 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/QZFZ22339125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64304b534fe22458f5eab2f12ccd43c04c6516926b829396072f73731979e9f. 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/CH7812226750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a838a891645fbfeaba313841e69a9ec14391ef25cea061251ddd6ca54dbb435. 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/CH7812239371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b67f503162c4cdc7f6f03fdd99bc6785ca999e72d6ad8022b6d0659a491e571. 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/CH7812239372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0dfdc5db2ec73b95284600c823686432f4488da7186f715732e936eb764e9. 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/CH7812239373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f22da93ad2a9236d1895cf779409f586f7d04e420211bba0eff5827817fcf. 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/CH7812236641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a19d317a98e2b521649b87e95ba0499264a4b3f992af97f54a5381c6048f22. 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/CH7812235228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64304b534fe22458f5eab2f12ccd43c04c6516926b829396072f73731979e9f. 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/CH7812226750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179d8b84d6797afd7b0ce233125ae1d3debfaa56a92b1c173867068ab4828ca3. 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/CH7812222879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722ce00b69d4805b9186373180ad78fb3447a2919446789c75259fcbd54d41e4. 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/QZES52230688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ab80c45a61b8029e546dd22cf6024f381e0c47e7698d72a74104869e8855c. 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/QZMER2195799.