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 0xd0f884bf97f8047b22f1d753130232857fa675889d10355bd908435c1f459da2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cf70e68-0db4-4a8a-ad2c-c1eb8798698e.json and https://artists.proofprofile.net/proofs/artist/6cf70e68-0db4-4a8a-ad2c-c1eb8798698e.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 0x77dd126441c2941555e5d7c6c37ae2ae831806c07b6dc33b9a3920a73c51d71b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWP011948601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8d7950e9eaa8266ada31e39d01195dee03edb6bcf6cb8052b66140b8a4ba9c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TWP011948602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056d10429be5e7e8b9c23f72b9d7e68fa8f8585ede641dc5357784f2efce04d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TWCX12001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253bd1277f6094f27ec9973c60fd702308e3109d9f0230f6e788e57bac84f8ad. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TWCX12001104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865872c1f647e6209d41f6f86135729d07a9112703e6daf0a1eaedcd3d0e2b2. 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/TWCX12001109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b55bfa83b2d49ad55a583118245899f9b2efae46d60d2d9bee783eeb06107. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TWC012210851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda41e16871ae12c94db337fc89ae4c41ed47c2fa31462bdda9b2ac0d835370. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWU712303692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda41e16871ae12c94db337fc89ae4c41ed47c2fa31462bdda9b2ac0d835370. 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/TWU712303692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac5ade08e7fe34b9fa3cc25d77d6f7bfd420407d25c738a94bceda9bdab701. 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/TWU712304212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39216a18845b9b452da977a2ad2a86f806e8885a38ccfeb69e05dc0a33e9011c. 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/TWU712304213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b21dc33a60870bfd9b27cb952419f9575590596c7d876aa4845049900197ab0. 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/TWU712304214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88c22412dee4852b408e744f9f10eef6d0ddf5a083478b453377f5e2928d82c. 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/TWU712304215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e229ef571d8ea4a66d82616d724b3b21ca9fa1ca614559fbafea57e831e513. 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/TWU712304216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa75fc53ce9318ebe528a21b95da8aeed911b46aa1cce746e08d96b85714058. 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/TWU712304217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54985c669e34bf748be867c0a530506570b0633cbeb718356c36668828c52d1a. 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/TWU712304218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2126e15b304cf797ec8015c767d6b85b501762ee6a7fc926b1f82d95f5158a87. 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/TWU712304219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0b7dbde4275706e66779f0d0decd521cb48f9f24dafda1e9bbc155f8da22a3. 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/TWU712304220.
好佳哉 (電視劇《我的意外室友》主題曲)