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 0x42308c5d7d8fd6923c732b809604800636b0726fd8e5193843acfcd3da926912. 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/f4e113c3-6d13-465c-84bd-772dbf32fb1e.json and https://artists.proofprofile.net/proofs/artist/f4e113c3-6d13-465c-84bd-772dbf32fb1e.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 0xb09f9465edffa3cc1668c919e58296b9f61125c33f7e5701aceb107923f4adff. 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/USA2B2400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b97f7b9d7b1a1d7b0bec0c2f6fdf8bbc5154e668935f2214fe07689cd0f8d8. 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/USA2B2400941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc966dbe311d926fe499f53e586609f3aa411c123c79b23bcf332684fc8584c65. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2B2400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fbc53325fa046f5c4f098fa595ba5f3824764d26ee0f477df1c9c3a9d8c0a8. 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/USA2B2400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d7ba9dbb808d022b813b1d47c411e243e8b1c8d155a5a90792f63ee4fd6e5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2B2400945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390e2ac5dbd23f1964166d0cddd1b19dbb7d174bd21f33f896caf72ffe1dc59. 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/USA2B2400947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa806880d1263afb97183cebda7b8227c8f2913108ba0d1bbaec506daa5c4c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USFVZ2290850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395b31a54ebbf49b8aad0bd8a21518dabf97e4eb20c0b7779a97589990dc46dd. 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/USFVZ2290852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a0b4b29d4dff9c92d26be32ecceaaa91836fb03bada551a80a74defa0290a9. 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/USFVZ2290853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67f5123e52018c87c93984c3750b7c17260f08566137ad5bbdcac24b4fb61ce. 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/USFVZ2290856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf8b89b43cfa516a06bcfca456fb4ae5a5d56f7144f20f54801320923b4c588. 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/USFVZ2290857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09f9465edffa3cc1668c919e58296b9f61125c33f7e5701aceb107923f4adff. 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/USA2B2400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed52fbfba52ee1a2e499b45bc487b38d8cddffa0b330d499a1846d93bd5b44c0. 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/USL4Q2077463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a36edfb9a6d2dea3c994523f23b688a450bf8f16ca416eaea68055fe9c5568. 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/USL4Q2077464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a99bd914821f4925030b26fc53801f33b602f7f42dcaa1a660dbe54e8a227c. 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/USL4Q2077465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961443055f9f1f6f2c07985b06260d7e2a226caa0c4c5a0bee7b42f1bd36f810. 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/USL4Q2098354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac32a5b237bc8fa11f1df176318b1ce79d3a505ce98423ec43b191e7a9fcef4f. 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/USL4Q2091849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5b8f16026bf2ad0f57b9d3ea2498c0110040d948dd289e10a1ec7fbe09f79. 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/USL4Q2098306.