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 0x840d1bd3048be922484b6d508a627b703d8519f51b9e0a75c0aeea684f0dcef4. 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/58863f17-934e-4bb2-83b3-9764dd6e6ff0.json and https://artists.proofprofile.net/proofs/artist/58863f17-934e-4bb2-83b3-9764dd6e6ff0.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 0x7944c00778e8dd05732666b2a5d1d256c7f6e08450379c14f533250e494a9f60. 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/QZMEP2444718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0bd145a481a2fb878a496d28c6e8e3297ac920b168290d223578fb1f18bb5. 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/QZK6J2422193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fc114d26522678ee208ea36a364583d678b59cb118eabafee6bab5ef094db6. 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/QZHNB2480250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935e941d428abde782055d3120479497bb291356447fe42e69ca8654b58ac27c. 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/QZNWX2327035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7db95cd273a8a051e0c983bb9d90ac82db68def53b2025964ee713e237413. 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/QZK6G2354616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721825041407617d2fd36e53c7b2d0a9593bf68b55bfdd2c8d2c2ed7bcca3e26. 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/QZK6L2305275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ea93b16d9e04d70713759e086b917f20a9cb82ff0556416b13a2c75df4a33. 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/QZFZ62333364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7788f598ea8432a24ed3ae4971e3f18c5b64aea37b5eb36d4b7178682f69d0f. 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/QZFZ62333365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f877b022814d1cd10806e60b65fa42a485073367eaf2640f824fc58ffe9a13a. 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/QZTB72242520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eac7bf9b7aabbef8e440fc32cb575797b8ecaf69b5e9f1ba9a0e4fd3218c6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAW2213914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff1cbcefaf8c12fb6b2778c436cf7b512050eca8bc8bc60f17dd671f32ca02. 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/USUYG1259058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8182e96ca0c626587f92449427279e6a2a69f7d2b6d1ece610d1234deae5699. 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/QZPLR2450337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365d8a9afafb25c13b9fc519c0a4a8021bf1694748b3d210dcf7169e69ba7e0f. 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/QZPLR2449718.