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 0xf98331cde32b0d868ac7dfe8bf75fad272b1dbd959d6c4834730ad445c332905. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/741f698d-0e03-4922-b20f-90021dfcbf2f.json and https://artists.proofprofile.net/proofs/artist/741f698d-0e03-4922-b20f-90021dfcbf2f.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 0x1cf4747e3771151ae38bad9c16648d11f8370263517e072a8dc192adafe9990e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/HKH901200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e4abbc6b41191f936fd1e0e3b2d2e7b85e2aa78fa6833c0f9e0dc263eb044. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HKH901200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957673228e687f849b157e697ae50749947c75a7815a919efdb08c6810345e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKH901200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b3de680a96ef7aabc948cb125f1ad938fed98ac920fe951d1e6522929ce6a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HKH901400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33266b6102f222188dc50da26dab2487c54a882085e7144c84780807fae38b48. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HKH901500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c90d24ce9ee950cd5cd748bf635085e8a60bd2dad938682f0d9683df73903. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HKH901500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4598754ad8b411812b189ae09bd098d3b5821880cd486ff12af0aea8f949b2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKUM71600882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4598754ad8b411812b189ae09bd098d3b5821880cd486ff12af0aea8f949b2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKUM71600882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06803150b692fa8532cffda84df2b4057fb652fc1819e94673102880d450fac5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKC840900609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f4cb41517689ffb94b43c03775eee8e248d3a6ced5ba78bbea8680fbb1c70b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKH611700038.
Touch Medley: 信者得愛 (feat. MC Yan) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4217d918fe14c95859a9e20c1b2da72e3a8286fd4648ab56e59ac01de91459. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKH611700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9995aad4f7fcb4e80ffd8063a87bac2aa40f1c2d33931ec750286083f33920. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKH611500039.
Touch Medley: Water of Love /獨家試唱/星秀傳說 / 信者得愛 (feat. MC仁) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1545989b8344e7872e6df46767201234b6ea18fa4033f7d8a515aa158920adf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKH611500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06803150b692fa8532cffda84df2b4057fb652fc1819e94673102880d450fac5. 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/HKC840900609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06803150b692fa8532cffda84df2b4057fb652fc1819e94673102880d450fac5. 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/HKC840900609.