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 0xef660c52144b23c8c9fbb051b0df6285284f6b88ded2417e38325224d228f9d5. 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/df0bbfdb-bce2-4b44-94d8-957a6ebc4603.json and https://artists.proofprofile.net/proofs/artist/df0bbfdb-bce2-4b44-94d8-957a6ebc4603.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 0x5de6626cb3ac95928f6911da637cba813db86d48df21f8dbf266f3f5d16d9f42. 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/DEPI82324862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b5dbf47c9cac721d94aba141a313611f0c8d9fe4c40b48023817a501fc533. 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/DGA072374640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ea224674c05b649947095a8013b7a60e0b50243009940a99c576c2c4499e45. 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/GX8KD2319830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dc69684938627b607f60b1c08b7043ac8b610b1cc9f6a3a754708ecb77e48a. 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/GX8KD2384403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa950da740d567b290d8c78d3f5b93106069a535bb3de896011cb64c7351be0c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8KD2328241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ce18a754d9baa1e554b0c1b70e402c7c34ff52c529a8b24987eef6df77f43. 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/GX8KD2395204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb5613c5a2d4db6263bf9e77178dd11e95d8ec5f2491879d5e2e4e0633c88c. 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/GX8KD2333134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb5a38bba065c264f59df2cd0aa67b130c179868ea19d886571aee15444dde. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX8KD2341635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9cc35bab3a6f9fe8dcb5f1952614ecccdf46670b8aefa045ff3d40dce5c46e. 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/NL2QC2100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc3d9dff6f665db2f8672f735fd5ccfe97a7a5bfc5ff2e2e5f5818876ada1f5. 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/GX89G2372920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9077acfcfbd286dae5ea8b061b8479f2a9a0a56f90b98837da01047df087092a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2249099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02419650bfdb47d3c3dd6d3da516a5b522e1b7155a78db9ccf7d05b531983225. 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/QMDA72205691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1395434e33a44f71e4fd934713fadc687ca18972148581119ed39d8819083a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS662279355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce22e69e9892f848fffe4e0cf3ee456d59c48ae3bc09a9bddf0517270a8e316. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL2QC2100491.