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 0xfd771f6d36235c94b6aaca239bed7a9cfc73107be8eb9e4b7e1c4c0ba10378c3. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d39ccfe4-b993-49b0-856d-19010194ec87.json and https://artists.proofprofile.net/proofs/artist/d39ccfe4-b993-49b0-856d-19010194ec87.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 0x524a5fddbc433270b283b63289f6db5266ce8db4b02143a19e3c71ed5aa42210. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMPKX1325596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7e0cd16b81af2b217ac406d7643d798e80e8fb573d725c228c85bf16659ce. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMPKX1325597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8344fdcadbfc955fa4fa079321f144b02212f0458708dcaae86ace1f17d97a77. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMPKX1325598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57092e030bc61ce3683301f76f34dfdbcf8c6242dc8247b9a68df76299882339. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:28Z), 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/QMPKX1325599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb85f6b72d036768f705088dfd38339cfb1941f76ca54f6bf93065ad6598348a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMPKX1325600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb24549fffe1470f7920ab65c258ea58c720b23253043534e3f2883a8f9fdc3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMPKX1325601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4454b9c5195b9b5456766159c5aec27dd549d991ec57c7e4dff967d067edbc33. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMPKX1325602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68b185154a9d6c9a0dfe2d8e129835aa3848061e9f55c7bce520b23e4ccb5c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHX2471764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7762f16cce0489f36bd9d106ea8a3a72672dbcc7cda52df34fdd2da1b4b7eb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:02Z), 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/TCAHX2471858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a83c69e70b06d755a033c198594a15364319e103c17df934d7d90bcdd2c6bf4. 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/TCAHX2471869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb855e010d5ed2f993c32247d2c134fe564c8dff86845917bf15027ffc3d85. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAHX2471891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde400c22397ce4f33b377960d6088cece989e4144a6e905df0f89301da476a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHY2498583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac5597d4829cf3092ab5d51386df401620e4d358150a6a74af64cb03b12bf1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHY2498589.