Television Broadcasts Limited (TVB; ) is a Hong Kong television network that began broadcasting on 19 November 1967. It operates five free-to-air terrestrial television channels, with TVB Jade as its
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 0xf573ea6f9492f71eea45ae4c55db8a8c70a781fb6c2fc16974f56a6f47df34cb. 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/5d5189b9-5dc4-4e01-862c-10031be41a20.json and https://artists.proofprofile.net/proofs/artist/5d5189b9-5dc4-4e01-862c-10031be41a20.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 0x77086c8f4a673d7bee72acd5dca1bfb1d4dab11d0750d63248efcb4a19d542be. 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/PLI862300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114cf9a503e87e6cd3aa119bd9d08c2359679c32f9f577899629e8b027f96918. 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/PLI862300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3245e16f95fc4ff7b151014422f0395205093e7696a85277621cca317b3153. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLI862300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77086c8f4a673d7bee72acd5dca1bfb1d4dab11d0750d63248efcb4a19d542be. 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/PLI862300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb07af9841a7665d75bc6788b0e69c2f2a816ac5091f10007c10ce166d0427d. 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/PLI862300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b3e7356da519cb54c588bbe921b2c3e425fb546d224bbe0348049b514fc45e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLI862300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac876ebdcd20c7c6433f18fd56005a9db2a6b0078e5edd44ba97edcf5aab0fab. 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/PLI862300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfbe928a93e41707923077b0b4841371d19cbf39f042123f71f9ef37e1005d3. 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/PLI862300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09aaaa10644a2af8b66cc80e854e582a50d0395045da974d64e969c1bd8fd56. 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/PLI862300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb435dc81d35cd13baed3761684fb2180bb35e00b156f168489ff022351b8ed9b. 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/PLI862300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010305ef548def658fbeff27a44527a7e15cc8257bbdce581cd94c8ad867cc7e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLI862400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7d817de834d32b29787b835f41a84c489c7f4a5c586dd850fbf3a14e53629. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLI862400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531fb8bf2b1b2c5a0b94dabc7a7b00289493f0e47e3295105f74e2d5e8a9a257. 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/PL86E2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531fb8bf2b1b2c5a0b94dabc7a7b00289493f0e47e3295105f74e2d5e8a9a257. 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/PL86E2200017.