1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x7f131d28f949fa48cb38141dbd4e5bceaa18e26421f40248f081be727b81193c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d795f8-5ea9-4354-8928-58a9639eb923.json and https://artists.proofprofile.net/proofs/artist/c4d795f8-5ea9-4354-8928-58a9639eb923.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 → block OTSBitcoinBlock must exist at that height 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 0x99a835973859d3162404961c37c5679d34124b4d5c4f4f0ec582161068575231. Chain 2 (Bitcoin): anchored in block 957029 (2026-07-07T11:17:55Z), 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/QM4TW2085730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402853170700eaffd73855e679830bb727809c4a9a39251defbb866926adeb4. 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/QM4TW2085731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35a9875b992ed4724beaa626dfe827fd9f260655bc3f0110b8de2df708b76d3. 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/QM4TW2085732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823c5b9ebdf29687559b8a4279653b496e7ffc1cc84f887b3818de3087234be. 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/QM4TW2085736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36a63e581d9ae852e9d6ed4259fa38efa465caeb15ced276a8ebd6dd322f3b5. 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/QM4TW2085738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c149db0e812ccff7329df8d1aac321d88f06b9bb129b688490aefad6fbfe5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TW2085739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa44bb61b3954f791c94b181e584f5958ab5019f7713e67ebe6f981e08744f2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TW2091662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bf1d66f3aa1da13f934f936c1a9a1e3021274801a1e4124b2d6bcdb7433c6e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM4TW2091326.
LK Quen Nhau Trên Đường Về, Đường Xưa Lối Cũ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55441ff3db3c9362dce06a4ab30bc7de7b4253c6de7b6b94ef85d566198593c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGCD1806473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eaf87300e14db01efa64d3773a07a25f19d2d7d32c348d8f1c860e7f05fea1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGCD1806479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fd27c722b95e9f6a84bfd4e62d6b5286265ae9c72d6c9f006c2406b318d9eb. 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/QZGCD1803333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2f7b300793b7d19fccceb59dd1145354f576fd62576cc57ad4e33677006447. 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/QM48F1758403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ff87d5b3a4b1f6f51ac00fbd1f9a9439e4d5af481cb9b47b092856dfed38d1. 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/QM48F1860608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab666fde832b9f03c881faf682fc376def4dc3b247febb4275300d51a6cc54f. 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/QMBZ91913796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf297a943eecaf1af4328df5cbeb7728ff172f45b6893de9f2eb36aff7522c22d. 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/QM48F1758508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce6d0754031171d628b66e508d1d6a2ac78d7026f3625439d8e4cb81b94f32e. 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/QM48F1657003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b172c03a1a770d9efdd9313c7378b177c86f81f8859c3757811d6c5b98ecc35. 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/QM48F1859304.