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 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 0xf90d1205e7edd8703eb10ccf55ac9ea3f2b3b89736d1e14d366a74f8b12dcfe7. 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/10df5474-d052-4b85-90cc-c508b51dac1b.json and https://artists.proofprofile.net/proofs/artist/10df5474-d052-4b85-90cc-c508b51dac1b.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 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 0x4ee05a1de7b43f2458ea65cf4d2a232f552313d8d9b891985283b1e6bad729d3. 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/CH6542234486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7902cc68b5406dbd10356d647dc28b1f045eb3f3081cc2db127241ea6aa48. 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/CH6542234487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedadac7531c65d0bcaae6ae21cb160089c3949a6ff31199b4012d66b140542b. 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/CH6542234488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeada3ab8bcfaa2b6dc5bffb8eb367724f9a606ab7f6d15dba146eb8500ed60e6. 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/CH6542234489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd22054d53fad012bbb71596a7914e0cba6106ed981a8d09a94441931610f4a. 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/QM5LC2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53438e6b7e02c73d26aa9d1b565e94e012ff795716a6ba22ef2dcadcb385c198. 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/CH6542332370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6095d855c6f16f4a936d91500675f9e8dfdfc1209b60e4454fe13e490761986. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:48Z), 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/CH6542367131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916126caf6cc520ac51c60552431cc22ddc9ba4229c201b53f5d032dab6a204b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH6542367132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dc47414bd31a38ccd951297cbbf035402299a9954e1e7fb0df6115e4b9cbd5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/CH6542367133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b105b21c2d6936797b5a73b76765df88744ed56143d3c8d6c7693e0fa4350. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CH6542367134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42cf4f463b3d4a82ac6167ad0da9a729b262c99516edf1b736851efd4a4c45. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH6542367135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa9635d798bcd870d3d92700ebb941d728ed7954b500a3019dbb481460af542. 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/CH6542367136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eebdda058df2978ec64d464f0f81bbd49e7b7efbf92662072ee064be3c1cd3. 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/GBKQU2436567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f554d1b0efb52812d4714772e4bea0553c9bf159e8332546713fb69e49d80b3. 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/QZNWW2461591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250438b287e46b6a043f5c5af155eed280a1358f24fc2d51f12a080b4dcd4a24. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:43Z), 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/CH6542436277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5da6f0eb1015e22ed25f0f304f04e660dc94eec3c2b2b23ded901b8717d0fac. 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/QZK6M2556463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7fb82523cefcc7d4fad9280b5d3d471eba0ffdae34c83cad3098689381022d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DE1QW2504834.