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 0x147cfae1f66085ff47d4933010ddfe0ae77ff85c4f0ff49a46e3f7868e10b71e. 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/99de6879-2369-4294-9754-3772f164fe19.json and https://artists.proofprofile.net/proofs/artist/99de6879-2369-4294-9754-3772f164fe19.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 0x1330b087f438cde7fb61bd1ff59f7f4de5b6ddb8820e1b06f137d6858837bdee. 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/VNA0M1846821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612d38fbddb68dab4b79385c988da2a388dd7805891918d0705e6c7c8c2863a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0M1907156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5467d9f641dff69e055f8003f1b0f21312724d6e9fc37edb84c3349f781153. 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/QM4TX2469924.
Best Friend (The Pokemon Movie 20 Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf993e92a0ac404ec714a6977125eaaeb7e43dd268b134de51a602a62d173339e. 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/VNA0M1908188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2f8be9c7021f8800196febd95483e13686f5ab0c72c0d188c55310122120b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0M1908786.
Yêu Từ Cái Buồn Đầu Tiên (Theme Song From "Những Ngày 20")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fd984e0078f949946e0ccf7943c0d4ff81fe6a3db83d806d126bf59753dc08. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0M1909422.
Yêu Từ Cái Buồn Đầu Tiên (Những Ngày 20 OST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d63d356ee1a31f335a460c16abba80e34d4f3b744311c852063e11b72c272d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM4TX2322139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5bf3eafff6e4221b76b56950fb4064f4cca7f410a2920af85e0e081224bceb. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/VNA0M1933970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd49cd14269baa7a91ba6ed4dad7abdef852082820e5c4fd13b72a1386b96be2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0M1933971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1d804048f6413e927bbc765cbfe07ab6a05f88779fe0c0bc989b93c7aeb808. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/VNA0M1933972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b9be5edb8e4270be73d7fb6b9e893f5a510b265b92f647aa4c39af10544f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SGUM72400936.
Tuyển tập những bài hát thất lạc của Jun Phạm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda30ee7ef2fc029988c0e0b84d1d6daef933e1042dd6934f3c3f15896d00224b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SGUM72500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457ce0a83bccc7799b05d735b5ba2d55f2f3c999d35d1f0fb8e7b2ebf30c8dd. 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/VNA0R2502880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67a637ea77eec799be707ec408415534f9f7d15c8412fc8b235ac8c9421e41f. 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/DGA0R2328173.