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 0x09315ecf2bab96405bd23f2744853ab5fa36b7b2666e39a3f2d1c0e6afa1c15a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1568566e-4fed-4c0d-a73e-bfe7415f9cc9.json and https://artists.proofprofile.net/proofs/artist/1568566e-4fed-4c0d-a73e-bfe7415f9cc9.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 0x6830cd197e8f9262aeb364fb10f45b1b466dcabd6bb92e997613269eac7dd90d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TWFC11907501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a6bb8e91a2e56555ea4133c103bfde17975cd1d6be233c8bcc41fc05549a4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TWFC12007801.
這個殺手不太冷靜（電影《這個殺手不太冷靜》同名宣傳曲）
新年暖洋洋（《假日暖洋洋2》电视剧片头曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a093715997517389af6be227afa8adf4a4295baaa6db43dae95d66fecb83f34. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:15Z), 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/HKI112111600.
夜市英雄 (網絡劇《東北夜市英雄傳》主題曲)
家人（2022快手直播年度盛典原创曲-梦想篇 ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4343138b685482fc23ce946c77c9968bba409413ba689f209889967904d7627a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TWU712300305.
你永远可以相信老常同志！（电影《我爱你！》宣传推广曲）
夏日战神（《梦幻西游》手游音浪之夏推广曲）
决战神墟（《新仙剑奇侠传之挥剑问情》“2023巅峰联赛”战歌）
滴滴滴滴（滴滴专车品牌宣传推广曲）
锦鳞跃龙门（一汽红旗龙年新春推广曲）
去不去看电影（电影《热辣滚烫》热辣带劲曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496944f031b5d37b1c62943272ea52ff817084cdafe2cee72c5d7a3e02b5e01d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKG731682988.
人生没烦恼无限公司（柠季酷爽主题曲）
末路狂花钱（电影《末路狂花钱》同名主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe979c4ef0cdb53a814df227cc66286fce2f1783c400bc32aa43935a28391a0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HKG732409912.
生活向前（星纪魅族AI生态发布会主题曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ad3fbc3b5fa22011c58c7fc99f1d9a04e84ee92367ebe5b107cd2acdb94b60. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HKG732553534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a481db59c2ec8b8f56d05d5369c1c90c556ef57a2488b8325484d9e2b12dd. 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/CNZ852308399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcb90f4b2c92facb03bdac7beba10fd0403cabe9d730e8c9e1d859367595c7c. 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/CNZ852307620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550bd0b5977bc4f980bcf8a0e9f4f97e5b9d3c8779d7782a93d94fc5a16698df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00225f4d64b33ca91b1596c7926e27ccbc9720ed528ff99dd686927ddcdb8e29. 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/CNZ852203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780fdee13281705cbee3ab2ffd229cd24528c9960fc5f854b783eaeacfc30e22. 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/HKG732418986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b60fce0e4857aefaf8d5f74b5085b6813f51217c85f1552ee4c91c3311bcac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732425191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3a5f4fba7329cf341b023fca14d073569142d706e5a934e7252fa13011103c. 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/HKG732425192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4702694dfa92216c1433c197065ab6bdd6741cbe4d91086b80a9bb4d147ca5. 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/CNZ852202682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c5139b2ef86bbdb3ad85c9ff8b1357020a41b2d99e261b42f8fe153306717. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNZ852202689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69475c5cd1e2b64177eaa6603df207af4d872375ded975d89f29662d788554c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732497224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee13dfc91cc5902e9ead5431d9f6771addcdddce97420cfa0f578245df6f7ef3. 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/HKG732488771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf531e2982224c59f7e096ac72930aea05800aff8bd8eee8f511ecc5f1d6a2ef. 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/TWFC11906701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a2aa7b39233ab0be584b604af7f8c68275f3e3f3ac545d10fc46d528056e9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CNZ852205428.
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