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 0xc5c9bcfbb83787c57d5b6c31138466bf3f8c628b9df4bc50a2752d8bde46a687. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f1fb796-bb39-42a6-88bf-33fa84761b6b.json and https://artists.proofprofile.net/proofs/artist/2f1fb796-bb39-42a6-88bf-33fa84761b6b.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 0x9d078df18384e4784ea72a1d1f1195d43d26b53f1a4b2c5bad26b0d705adc2b4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ5AB2072327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b22d7be2994daa9096989b07907633d2bd384f86383d922e94738ed101401a7. 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/QZHZ32031202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240f33fb6ba6f00d37b2fc699339d65e19ae0df8e754f928aad34e900c433b41. 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/QZHZ62089549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc399ea1acbe5b987f7165140a76d8391b827ee4787d3673c5f5432e1f392e279. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2099809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819eac418ef9a8600008d4489980ed05456ca45f41e4cc9e1745e2a05a4d7b5a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:21:51Z), 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/QZHZ32134321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878c0c8643fdf21c5b7beadf2c2db49c9bdfdd51468b95eac24faa0d52f29f59. 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/QZHZ42164713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239496f078ad92879922df81c5737caa843bcad9ef0bfdeb9da9215ec26b331c. 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/QZNJW2155926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfa45afabf8babfbd8262409c5759e6dc8ff1b9bad63929d88813d9ea50aa9d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:56Z), 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/QZGLM2242555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44a670b0bd430c9a64e693a1be3dd7d328c0eb851df8cce4d7f0a1981cd960. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:26Z), 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/FR2X42382175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191373fce3baf00c5e16aaf27bec6a6adeaf68be09bcefe412fa9605f7bdb1a7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR8KO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6df46b30385809a52dd6deef232a5219ba31c489915776153494d722d953b65. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:41Z), 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/BR8KO2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d50c514f1c5df48cfa15c7cbc508aa23587dfc9d711567c372e86c5c78a768e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BR8KO2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1d2e5f0126eb6b2ecfc1141f8800315f9572881d7a226c3b751862af27042d. 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/QZHZ42058087.