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 0x314d414b9dd94c7dddf0bdb336fa64cca181f05d0b8822292dda72af1c5b1de2. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1141e174-71c3-4cf0-8a85-0d5e05b46ee3.json and https://artists.proofprofile.net/proofs/artist/1141e174-71c3-4cf0-8a85-0d5e05b46ee3.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 0xd277884e36e816476c9d2c21b382065efc027ab44fb24beb1c939716a836e873. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWDL72302160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c62c14ba427a73297595440db3cc23d9749684fec724a4b47bed12dbc161c. 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/HKG731751332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf100b27331df714dfd249dc11963ac530f6cff3c1888c84b148acb8b958b25af. 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/HKG731725850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f126f51966cf8b6876ba92ab08c0283cc4994d612f7710ca3f46d6aa33c179. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732138436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8bf8c8db17e922eedfd4a917ed079d827376aa72d15329440777065fac8c2c. 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/FR96X2119794.
心有靈犀 (電視劇《龍一, 你要怎樣》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbb55b9270785c3f657b5b2d0a639536ae8fbd61a7169f071d82757e7f82087. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TWU712203807.
甜蜜呼吸 (電視劇《龍一, 你要怎樣》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f15ec98516db8725d038826cd32246be5feebc1ef00908d223631d72fd186. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWU712203810.
站在無人的街道 (電視劇《龍一, 你要怎樣》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffface4a6c4e1687015361214af4fbf50c767903ca2d6badcb59cf4f5559fad5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWU712203811.
仰望星空就是想你了 (電視劇《龍一, 你要怎樣》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1573e79adb1d349c1f9c2eeacc6666592532a77a5ccd7d78ff16de594459522. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWU712203813.