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 0x1a5ae827c05aa6cce0b5c7d0128eeded7f3e14c1f3b5b025be4555ed61c4678c. 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/ff8fcde8-0797-4bd7-b47c-9e863815e3c9.json and https://artists.proofprofile.net/proofs/artist/ff8fcde8-0797-4bd7-b47c-9e863815e3c9.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 0xf474fd6af3b416256e526211886e3e471160bf2b7be66cfa6edf8c2e4681c883. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ331800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf238b954fe013f296c72f83df27db0927ed64a63e05491dfb6f60c0d192357c1. 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/CNZ331800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3588a608211d19e3ddf5d4b954d5ed4429b0e989050db8826c0432ee23138d. 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/TWDL72401629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404dbc1daaabd810ddc81bf89e131e7d5c8e30818bb0a509dc9c7febead54cd5. 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/FR10S2405930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1939ab390adf77dc7358add8e5fe7a5f72f7afe949c6ba1292ad8a2da3596e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0H2375803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9789e492fa2261e56ca838fd5ce356958304c59fac0bf67d8e039981b09c3b54. 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/DGA0H2372980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb6ce84929c3859401ef60aae24a5db93b5549cf801edee6608033dfade285d. 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/DGA0M2334133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90505dc8080062c020fb3f554cdc6c4a634734d52838e4668cdd14b614296421. 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/DGA0M2334134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7439d0b744caf6a98717658cb4b0470e631591921200cee7ae775039cf9fb8ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWDL72204950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df92d257de912a35907c9e9fe215293e69a8645bffe2c52d7e2e565d8ab14b8. 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/TWDL72202667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577d64a5db7295749310718b24fffc89f6a02248e36a2c1917b4865e12b1ff0. 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/TWDL72109959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cceaba8cf4414228dddbfe867eb97cdc053fb0bab8efde062d511f6db7088. 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/TWDL72107419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c180efb59260c268d9e37c299849a387b13837cf8a9d543305973490064a10. 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/TWDL72105087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544ab394dc609382a64a150d9a477006773e59b51d6ee81ba42ac0d8498c4c2f. 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/TWDL72103012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728406d6c36c540750ad442d4f90e1d19a58c5716079bb76acbb17782fded6a. 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/TWDL72103013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecd7d8ed5da7fada0a0687d70b0a9cf1ec1a4c99ded41cf15991510b63b7e17. 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/TWDL72020080.
如歌往事 (院線電影【黃花塘往事】主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694fa6e576c124b1bad705d232b24cd4c6801a6bb7d66eb55ccadd5af797a692. 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/TWDL71908268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9857e09776134cba4ed8b523976dc86602426ae1986b7fd5427eb6aa528420. 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/TWDL71908269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e6514b70a6fd3d5f56109261cfc3f59cc1a0df6179352cdd9052346811e29d. 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/HKD012387632.