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 0x77fdb404d459a715ff2d9a4c681c9fd9416fa815a46713086cd7e0c8e7768931. Chain 2 (Bitcoin): anchored in block 953721 (2026-06-15T01:12:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bcd9d8c-e84d-42a0-b477-a46fde0d29bd.json and https://artists.proofprofile.net/proofs/artist/8bcd9d8c-e84d-42a0-b477-a46fde0d29bd.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 0x815491c5a96c94f8b8e9ed86b7760d74d7f808bff90e726568950bc9ce16f851. 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/HKA411900092.
剩低的離開的願可再約定一天再見
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe89ca7ef1144b9886c9f2bb7d043e82410926f1e2d41afbe2258305324a82. 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/HKA412100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f81fa4ea514a949f6a4e3ce227896cd4ff55c70defca5984d50174797e4ba6f. 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/HKA412400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bba09e0bdacc73fa86c1a172fb4388351cd18da692c03d1853a9972e8879b41. 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/HKA412200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e8eca8db83bb970da8b6ccb62c903b4116a8c9f6159a569506dac9f244f729. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKA412200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe89ca7ef1144b9886c9f2bb7d043e82410926f1e2d41afbe2258305324a82. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKA412100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815491c5a96c94f8b8e9ed86b7760d74d7f808bff90e726568950bc9ce16f851. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKA411900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4e7d94898acb7ad88119abff431df0cecf38d9e8c89b40848218b7a599e4e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/HKA411800282.
朝如青絲 (香港電台電視劇 ＜忘憂理髮店＞主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f470aa341ae8b7c2aa66953c54b86ea62b52ce6b280683b110f750b0455f99e. 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/HKA412400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f19d603b20d6d237738373cc9b4b57561653dbe2b3bb4ceb1e38c5db08a75a. 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/HKA412400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed50c089e640e4d429bb77545d95b8ca0723dc80c74e7c069259bb48220c0c3. 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/HKA412400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826af01c439ea304de6fa35c0a84b1a1a410c701c90551794f532a964530d4f8. 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/HKA412400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010f78c3d4a3ec5acb0ca210bc8be9788db34124e5df2e82fb63d206c47dbe55. 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/HKA412400306.