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 0x20a4c2aa37c1dedb883388e628b2daa779de988f20233b30b03ad70a95065a29. 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/88c47c25-4424-4b41-8c03-ad0f431d36eb.json and https://artists.proofprofile.net/proofs/artist/88c47c25-4424-4b41-8c03-ad0f431d36eb.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 0x76f6076e14176f43f34554fa3c3e71d5e8bc94c93c760f06c141211fcf8b1b7f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/VNR011037804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d8f61603b1a370638beffbd4a9d0abddd444ff493ebd816c259b5ad08547b0. 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/VNR011038024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89d82c2a31f05c826c6ceb0fe4d9619865f26730f3abd5479adaa705b1f99c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA72206596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda25b39a05e782762f3f707096d1962fab600bfee961f2b6334dcf5c1f4d2eb4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:53Z), 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/QMDA72219518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464bbc95c610e4729eebfa437d9127dc03b4472aa157d3876931a4dd18428ef3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QMDA72219521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ed08b5637709712aafef210cc0c10b83f6a3252b04618cf906504fdf402ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA72219643.
Khóc Cùng Em x Anh Chỉ Là Người Thay Thế - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee8653cb9b5d5819cf2fdfbf4a0b59cebb78627a2e7ee322a0176cbb2be01d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QMDA72219646.
Sống Xa Anh Chẳng Dễ Dàng - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a972743c83187079ca58a5d9e43e21e0cdb3251b52fa7ff0f189ef2ea2c73f7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMDA72219647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf0c31797688b70b5402e508b86e5f49554fc8837c86036387cf322a737798d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:50Z), 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/QMDA72219650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dec7986452bb410271d9ce4a59781f3dad48da364384c41e70724bc2d9e2bb. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMDA72205899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2972d3103faf1fd4b0916be9f9659cec01c652dbd139a881f434ee7c768ec. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM6P42401070.