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 0xa3b573d0e27674f7a8b104532c3032e8f2c054eca6547e18a2f5b119426170e3. 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/329cbc4e-bc07-4903-881e-7d166fed6671.json and https://artists.proofprofile.net/proofs/artist/329cbc4e-bc07-4903-881e-7d166fed6671.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 0x23d64003a82d82321588fe9b596ad67d040a7713ec17f3791984cec46cee40f2. 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/HKI499503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec85e4567c544e862a2abdf2aaa5cdac0cab4df97c98f38fb9412c6717175401. 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/HKI499982107.
華納廿三週年紀念精選系列 - 葉蒨文
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226e96e4f02f503303af140ab528bb0bfc0fb080b21cd3f2bbcfe413ef28e92. 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/HKI499503206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329cf6e0eaf8e907e76eca87c1d03a5f45c3d6ae8f3bfe8c19efdc6de37ab24. 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/HKI499503213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d64003a82d82321588fe9b596ad67d040a7713ec17f3791984cec46cee40f2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI499503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d64003a82d82321588fe9b596ad67d040a7713ec17f3791984cec46cee40f2. 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/HKI499503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329cf6e0eaf8e907e76eca87c1d03a5f45c3d6ae8f3bfe8c19efdc6de37ab24. 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/HKI499503213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac73629352a18e5914d1c24671c27408fe64a0127d4903886080811badefaaa. 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/HKI499503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd329cf6e0eaf8e907e76eca87c1d03a5f45c3d6ae8f3bfe8c19efdc6de37ab24. 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/HKI499503213.