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 0xe09daeecf002b33f414c292729672c7a9e574fafb9167ff1fe825d9423f705f2. 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/b2addb08-dcd1-4cc4-bc17-1d6daaa6e236.json and https://artists.proofprofile.net/proofs/artist/b2addb08-dcd1-4cc4-bc17-1d6daaa6e236.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 0x0fe757bc60f83b3a843f8a35f0d420bddc21876cc4b5ad3dad92c9ebe12f35bc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ4JJ1984772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da2db84ab60e2afdaa1028ce5f809c451b853a2a2f045e94e0cd973e798f526. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ4JJ1984773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97507aa3288c3e60b4e86d579a03f6245b14d930bdbec7791a7952b69558a956. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ4JJ1984774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2c1d53dea390cd5bdc6626caaee6e2257db3ee2278ffc55d6940ac6acb9186. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ4JJ1984775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361c4a49033e89f924ca55571ae04fcb35282c02ee03008bcd292a50377dd6bc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ4JJ1984776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d31c7b6e2f66af332f9008443de1430fd9234566465d54d27efc42142c61c4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ4JJ1984782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3073dfaa2db54a4c98d541c3106baaa03cc3a3c6d8c6fabdfdb023960dc188e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ21996864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd245872fe3669292a51838f338d5e8b2748f87484343286993dddb87e58d264. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ32047345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d228a37560c3ca91027d8d8246ca1ee636c4b084458a9f2bdf575607bb1040f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ32047347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31348aca45f1b7a185d0af566fdaab8d9005d8eac3aea4188f2e9cd69f90aa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32047349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb409ce39ec0cbb91612cb809a8e12af49860af3eb2e41a01ebda2e27f7aaf. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:42:41Z), 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/QZFZ32047352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1686da28097745b3772faf4324e4264c9c344f5783bebb7ec16d2c0ac6d0643d. 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/GX8LD2420114.