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 0x45265ad80e32c59706326c05b0ad467e5028c9445e482191a72f88b7c74aa525. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3083c40-9391-41bd-932a-6d3d6ea9f5bd.json and https://artists.proofprofile.net/proofs/artist/c3083c40-9391-41bd-932a-6d3d6ea9f5bd.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 0x2231903e10b7e79a267608522bb3b99adb06be28d33bc225542b56774cf676fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612302514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb187952ae83409a78213422080b40a7721a2bce5727cce4f01852a845e5ee84. 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/HUAHC1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517431138c6e1390f0808183a2aadbc72f5be72a06c70cf2c4a3958dc7c30440. 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/FRX282197132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7661a0239888cf98d8084ff7663189be74f2560ba9b1226fc1ac0c0a8d767e44. 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/HUAHC2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b38158937893c3ac50278a733921b7870eed3f232c0d831646f28a9f05e7c. 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/HUA792300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15958c9c4b757d93898afd44469dc06a56eb3aabdf5b002dceae925bbb3f3329. 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/HUA612303388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719fe631c9f2fa4b64c088a3bab206f1dc244a0d2c938b691edd792408cbd875. 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/HUA612303390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddf3af22c6d0f6bff0fb2237815589560b235910d528ac14f5e58eed140321a. 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/HUA612303392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfa377f454664b7c68f515c73c914857e7595d8020cb60fff766a018a3e595. 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/HUA612303398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beca244281b200a630336e851feb9ecc453fb528bc6a2d6afc2821077f01468. 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/HUA612303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ca33f5cab8d4beed7a3380b9adc8627ee2171205776a9f55a3bf60f38bd21. 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/HUA612303402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414f0aefad537d5b8bd71d6421b70fe7ab8ffc0ecc2961c517aef85c370d6f9. 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/HUA612303404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda06384b1b0a01d4423c4cbcfefda52c34263f3e52d788dc834ca8ec4b65658. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX872424495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2231903e10b7e79a267608522bb3b99adb06be28d33bc225542b56774cf676fa. 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/HUA612302514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77002720318d8989b4d7b468963c7b943f7ac1ff9c13a0cea2151d1cf683bbce. 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/HUA612404392.