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 0x4f28779d16c1b0b5a4592bc14d4415cf2aa2b934e969037088231224ac4197ce. 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/a32f1621-241e-4071-a9d7-f33f6ddf5a3b.json and https://artists.proofprofile.net/proofs/artist/a32f1621-241e-4071-a9d7-f33f6ddf5a3b.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 0x6cdeae69448081dee2cd04384b773378cb428a7a4a256bb4acd7422ffcb51a45. 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/TCAFY2107342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b5acd011963fd8fbe5bd1542cf5418de5a35876749e96de2d8501e4834b51b. 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/TCAFY2107346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a5a51f1bb1b653bc2c05ba5a7b18aa8c3fed7c2439f752dfca5f8d77b78a6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAFY2107296.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa277e72daca2c986bb56a8522c15afd322e09fe0a20e8d229ff2d07be34a3dcf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAFY2107320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e76cc50f6504e2209210b7a4b9523caec78abf34a329552601ffb6b214d26. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAFY2107330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea081427333edafe4dc6952b091c07d217421896deb4398fa38a51006f22dd3d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAFY2107354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b60e2d0de7774f15aeca31ee1bc250d833bccba8e078ac4d91bcc7fec0c23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA1973299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45352f918e238c910cced49c1f88503941aeb4b4255b66e8b0138f1a2cce2f29. 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/QZMEP2117582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfbacd077db4aa7facc3cac2b5ba0d684371ad333c43ed0ca9d46dd2d5ae298. 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/QZFZ42032899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a7811d86d47e90d40eb31062ce1e4c3851bcd7aab42f6acd4c96e8604d1959. 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/QZDA52354748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2f8c3d00315fccb4d61690b17a4da9e5d95a90af3fed1fb6ed88b418ec1d2b. 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/QZK6P2146155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7896d837f119f771fa8f56584d084dfd045c7910df4c1c7d6a1a3cba3fe8ba. 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/QZFZ72273196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7896d837f119f771fa8f56584d084dfd045c7910df4c1c7d6a1a3cba3fe8ba. 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/QZFZ72273196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ff3470508178e1bfc522204b7a2a6b9657dfb359cf7451771437006bbdc55. 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/QZFZ62233239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47659342643f7cdd0b4539eceaa3dbb9bf44db89b1f0cb31e3d9dbf545bb7d0d. 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/QZFZ62233240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff345402f5d6192e9563447934aea93a7e0252c9a5c89a9b316d4fc404d93cd. 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/QZFZ62233242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2121630591e2ae1415b28b245f5c46cba7ad2189ff5b634839e47bd3baebc9f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:24:58Z), 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/QZNWU2128034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65111029055771a631efcfd8db9e614e54975c2f0e37548b02b15864aa40143a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES52272929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de70e97bc7f44b9249fdbda6b67fd3c95e2e14d9951259168311d33ff7a50d4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZES52272926.