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 0x06c8039110b5fdda53763faf0eed79a3e879c7abaa6d5143da36cf78cc17a3ba. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4aee297-d998-4027-99c7-881caac15e18.json and https://artists.proofprofile.net/proofs/artist/d4aee297-d998-4027-99c7-881caac15e18.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 0x827dfa9f7b74655afb2b0974f96bcca7cd7d01c7e97d7a9aab03e76fc8d489e1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TWP011951701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b5a43351884125e0eebd47397fcfb64dc0ad4478279698af0b6fb38f13aa8f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWAE32200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977956993643b35e829ebb97eb4656426b2b093da4fc563444cfaec6bca4204e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWAE32204005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c86b2fd2eddc8bcb3a562e7616974e5acb71ee9655165e8e5f4a3abe66134. 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/TWAE32100980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528d64eabab964b3a638f46cb380b228d76a3097fea49820651904a4c4bb951. 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/TWAE32204006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8796a639f605623a3c826eb0df0f71d95b57f734fbb64c949673e10245f0de. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWAE32204007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b090e0058043b81c272d3427ca27e2bbfdcc94485b69cc6412d43a1b0c84ff3. 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/TWAE32204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f80f624a195ef8731d922f636962510850d7b39ae0f433d64928106847d2d38. 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/TWAE32204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89573e14a7757975d130900b05327e102ff41408236275193b1f162e85c85c67. 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/TWAE32204011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74e4e1e24426535f2dc9d98f3e60dfc4a6f9a007e165da3d81039f1591d12f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWAE32303161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc6e3a6d467c5363cdb20ba0273b31a73c913540279c2f356435d18d7e92bef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TWAE32503326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3088da5ce1981418361476d3154193cf934ce075ae9371987b19f66081f2e4. 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/TWAE32502577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db2f12716c55bf8c33ade1ec8a99b310c9df7d23a38326992023486af197f75. 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/TWI452100012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1182442fa0759c147b9c2bc4d561592a9d2fea9117e746790c58e2273df60. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCG52299678.