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 0x5608e3a89e1596693f862dcc94c2dd97025b397b1a4c58e8d7763b9bbecb7b15. 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/3c8c0832-2605-49a6-bd29-df0c5b16faf2.json and https://artists.proofprofile.net/proofs/artist/3c8c0832-2605-49a6-bd29-df0c5b16faf2.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 0x26fe921eb5b559ee067c7ecafbbc7b1af1d85344930f9a0079a7d67ece57c079. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HKF090900282.
時光如剪（電影《古劍奇譚之流月昭明》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d23fa000c000ea1cdf31b37ee271a35f71431c9e2084ed8d4e42005873040d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HKF090900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1833a2832c970f84001ae826de5026e5bbd26a315b66e06cc28f46c4f4284e8d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKF090900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbbd31ce12941b83d9d59f073f18102e8bba7ff1977191a0a1ab5a3ca4ea0bc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HKF090900296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c71ebe23514db239618c1d5be8380d3b88e3e289918cc3902d0f489d52d6ccb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HKF090900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38947a22e20c40a7adbdb5c510c25e4a253724b3cc2346daaeb3cf4744e69f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/HKF090900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd223be96f106a54e7de4fa507d1a2c15bdf45b7272f160f201ae78ec3bb15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HKF090900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47809b7d08e512cf3a7e004b305db2720771afd3fe6253b7621032b4e9ecdb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/HKF090900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a994d5496853f55bb976c7eb72680b51bc14ac8dca180c72f2a156b883785. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HKF090900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c934397a02406e65d809da7e077e9e393942bb0df03a1313d26152990f58228. 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/HKF090900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b38947a22e20c40a7adbdb5c510c25e4a253724b3cc2346daaeb3cf4744e69f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKF090900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f38abf9e67d1fe9a68393b80174e614b1657aa0d26e11ee173ea86274fcfd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKF090900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2b4677f0e16e093ec901cb3f2b6a3de1f99978ead43f163e767e89f22300d. 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/HKF090900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa849a39204b0962cf7b6ebbc270851f3d1a51c5fcd89846244cc72389d18b9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKF090900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5190cd712053fd969fa384ecf7c71cbc72004bb55f6fb87b2210e59bc918021b. 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/HKF090900333.
一往情深 - 《獅子山下的故事》國語插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69ecd86fdb4f47f70baa02eb87c2d1d99ee99433c800d23eed51c3631d7856e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HKF090900347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbe7b546bbb70cbf42c51f2de2481f64012296512ecea6d2bc99d4ea461d10. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HKF090900294.
時光如剪 - 電影《古劍奇譚之流月昭明》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d95fb8e1b8c73549ee644030f8d3cf73dd0d6ec925ea8e625dbd0e36bfb202. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKF090900284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c934397a02406e65d809da7e077e9e393942bb0df03a1313d26152990f58228. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/HKF090900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d775313c45a83f62922cd459ef49c36e981e39f46ec51b27b85b8c7c5fd4c9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HKF090900278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fbdeba757dd965b992ee0918dce73024014266e630d75b2aecec501773325f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HKF090900763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08742124a714fd88e7d69a7d5ba3f98d731ac07685c63fb961a9325e7232782. 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/HKG732281278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d13fa0aa2102538823bae23f1cde6abb9c9a1fb04b421d130682710959b9a5. 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/HKUM72100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d13fa0aa2102538823bae23f1cde6abb9c9a1fb04b421d130682710959b9a5. 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/HKUM72100370.