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 0xd3b4787d14565c14372e2b07bc0d6695fca2bc0a1e0ca3249d6e02ae01f1f31a. 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/34a069e1-8436-4897-ab3f-4a3f58b89fd4.json and https://artists.proofprofile.net/proofs/artist/34a069e1-8436-4897-ab3f-4a3f58b89fd4.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 0xcd78b734f4e4a3b059462cbd647509b1d6deec20e031642eef34b6746bfbe989. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/VNA2F2300937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe1221ff3f27f3db4104383d5fa7d6223174e3ebdf8bbc2fe2d0266075d4c8. 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/QZW9K2369119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a48eed361a5ee02c13ae9a7bb06d39f26c54408dc6759058834d2465002d37. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:18:54Z), 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/US7VG2452679.
Mắc Gì Tết? (Original Soundtrack From "Mắc Gì Tết?")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68575d48e09208bc72a4b268a7428b89d533ccf031f184b58a99ce3fe2806d. 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/QZMZ92482617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365022d7bffe0971eb3b2eeff47be3f978f1f0c7b4c17179936d08435208c502. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:23:34Z), 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/QZNJX2492834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f4293e52b0b4e731a9ce95762556f1d595d5467724c8d496adf5e1e31cf07. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:22:34Z), 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/QZW9M2408102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eee8e6e17b53d7ec7379d14607d93148bc637268147fe8fd42c27066ffb07b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNJV2501674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d78f7c26c32037e5b26a88645e3fba81774cc8f16c6cc70ffe6404074a9497. 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/US38Y2417287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e728986f31724d7128c6e26c5c579231a49a3844447f95bd10378df6c81769. 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/US39N2309944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d5ab429512711e08d4fde92681835e2c4eb222edc9b5a7b388ce05a45eda3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US39N2308508.
Vẫn Lit - Hội Không Nón (feat. IndieK, HURRYKNG, CAPTAIN, Ogenus, STRANGE H, gung0cay, Yuno Bigboi & Tọi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2701564ad40abbc400a93430c65601746204c687f0edc236b5909f35b9e19b. 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/US38Y2301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf713a1df3643376460b178445c026cde7041c9fe6f20032ed8930909e4acccf8. 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/US39N2313854.
Yêu Hay Không Yêu (feat. Tọi & Hydra) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f02fa97f1cb41356d5afa95c024a390c3244826cb4bebeea0578c6a5baef578. 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/US38Y2415222.
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