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 0xf196d082395c0691902121bf1cc036b7f54835da7ec8e6948940d9e1109bfc14. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1f0a404-ae7d-4c18-8255-e9c42d407200.json and https://artists.proofprofile.net/proofs/artist/c1f0a404-ae7d-4c18-8255-e9c42d407200.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 0x4217ece89447ba78ef8b277c0dc73a8e6251fb7657e1d64aa26b5bb58636e2ff. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CNZ511600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c675baa70d913bd1e2b8abde6730faf0ad52b8fda45b1241cd05900ea8310. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNZ511600021.
BECAUSE OF YOU - Piano Ver. Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44667f1cece3e981ad09a3daeccf2a8e471b79d164c6df0d18d64c49aecfbfe. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CNZ511600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e47ae12ec6561353afa127cf5db09e2b33b0906ec6c5e9931295576eb23db0a. 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/CNZ511600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b04549a277c0bfbac489c7c97d8472db415ec02be7688535765c23661ee93. 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/CNZ511600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba3513d72220dc3e36d0e3656d37192930b4c8f9db96b0bffdf4685b30ed20. 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/CNZ511600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2831c8d132ebaafb8822e2f868006259395f9e7611faff2c535359cf354bd953. 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/CNZ511600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844efb1d01e377c339c43cdf0e5b37f614a855985f83b539547e51bcb5ba062d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CNZ511600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8317fadc1560848fae8770c104e8fa18436c8123c0f6b84d3bb9073c079b55a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNZ511600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee4576ae5d73f1fe798250ca4086781d49d1d9ce5dcc0016767bfe7ecfd964. 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/CNZ511600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9104862ee538e9ac55762e73bba7e5c07c5d99919f01e54efc6438a7fbfee59c. 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/CNZ511600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1667fd338656547637b5382ebcd32bee09aaf7d4edff22467ea5431d014d3a1. 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/CNZ511600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7b24488caaa38a3511001208358987d729676037991422501468ae0fb2d07f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CNZ511600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1ea33d1fd66971262465d9fdfd85c5dc0421c4c16f89849c1fffc128b631bd. 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/CNZ511600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60c42b9fe2d82b9f0da534007833ab8a4ecdebaea97f7b7974fe709a459547f. 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/CNZ511600038.
BECAUSE OF YOU - Guitar Ver. Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784a3efc95a192b0a074be709c257eeb1c60af2a7b3dd60d98f942f61e40c10. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNZ511600039.
忘了去記得（電視劇《我是杜拉拉》片尾曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4666454c6f719d17bc117e8a3fc76db7e78d59bb6fe77c000711c1c5b7d9a9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CNZ171600323.
出發愛情（浙江衛視《出發吧愛情》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c05d068d4b0c94e2a3b433072ad112f4b35c795e48744e2134ae27691d1de0c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CNZ171500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05823bbb0e7b450e3caf07a53ff56b2ed0c6f6bd86f755c33235f512ed020e26. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/CNZ171500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc8c19bf4bb96b4f71a1df34e1b4e1b375ed112c3e50997e60d5ee98c85257. 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/HKE672200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877f96257cad9befcb24e64d7105af986d353cb69812c6ee7fd9d95396bbbc75. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKE672200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d06fec9bd7f8091facdc01eac39e9d743dd4a174006237879a7f8f4440d6c7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWU712201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd736dff07850309a22931e945704d1d7f12810204c64ddd63ec29e3ae9bf46d. 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/HKE672200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e66427114ddfdf042af6b05ac69f906d7092a3678a7d06ac917835ea1971e7f. 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/CNZ511600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67b04549a277c0bfbac489c7c97d8472db415ec02be7688535765c23661ee93. 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/CNZ511600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e47ae12ec6561353afa127cf5db09e2b33b0906ec6c5e9931295576eb23db0a. 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/CNZ511600025.