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 0xaf20a3f8fde2e6b960ff0d3d76d1c5f5097618f9c1c123ec31c1dbdcb8ab35f0. 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/aa4ac138-0059-45b8-9597-14d8f0dcaedd.json and https://artists.proofprofile.net/proofs/artist/aa4ac138-0059-45b8-9597-14d8f0dcaedd.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 0x0a02ae0a333e715bf7430dceba52fc7b0cfb0663f5c33ac4e8be62e2aa7e3d16. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM80759580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5b0cbde33d86cd4b131755a43f188a269c652a4b7aa8ffd06c38a8eb56265. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:32:59Z), 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/USHM80759582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9f8cbafd5a9d374dabbfbc22d3ee0ec7e06661ec28969f8a7751dbf6ba610. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:29Z), 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/USHM80759583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d960da5f8759c9d42b7cb5acd17a31d0310af1adf91a6d747c07294895198ef. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USHM80759584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b90bf92824468e471b7b26b41f200c31c5da0dda0c04d48fd1ef4b238fddca. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM80759586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80bc30509b0916a78a65f8415981397382d884815ee555148b8680445e06f65. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:41Z), 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/USHM80759587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c70d601b0b45f0f742920b7005a0b73343eb480157e635928a21d47be4f9cd. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USHM90617979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0347d92b0a2c20e231eb53996a0125db96dc722fa0d2a8a647fc7c48359dc5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM80759551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886740d1431e0ade94a4c9d4a85c4f2017fd7ebdfdd280add12332d64b13f52d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q1716362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c44cee31b9e262e941d111334a72f6154d34653573dcfa6ff3211fa26e243. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USL4Q1716364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a08940feb798fa736fe9db3cd1212eb0a723aa728cdda08c6bf0cf2efdf9d81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA0F1798986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cad5bff61a14b943b3cdee454c2c8319379dec99e2f7e726ab45666f61a8c0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:10:43Z), 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/VNA0F1798987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0cda590b16e3ecbd38c4953082263d303a552218c765305586c605d8d0b88. 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/VNA0F1798988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f70f1abd9e560cd4b5b92128f29cd2195d709ffdd818b04b2021ea87641ce05. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:04:03Z), 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/VNA0F1798998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5566589fe89da394275be0801ac79c1fc8b95bbb906c6e8b26584d8a1cb669. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VNA0M1805448.
Một Bước Vô Tình (Hạnh Phúc Máu Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b1154713745fa0f628e80d6c94073ddc67a0754280d6d9bf89e8f79266b016. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA0M1933610.
Lời Chưa Nói (Nhạc Phim Phía Trước Là Bầu Trời)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9672f8412c358e3676c7d8b45a030e5d1d2f224dcf11bc2ec1242f5fff1fefcd. 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/VNA0M1942675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c23fa95528169005a306de86fbe3ce98aa3ce695878cb2f149904539e4e7fe0. 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/QM4TW2091310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9688e0d4fbb823c9f394acbfab06874096f5acd64e5646ed6983777094f06d. 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/QM4TW2091034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbadc8d38b942a5c417370635e2b32cacfdece316feabd6505df5fc250ceacf3. 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/QM48F1758505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc321a7720a88639c32f7287e1af0669a7ec68057eb9418056abdd381fb27df9c. 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/QM48F1657002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b6867e25f182489bab7940251235a334af0ba19f44c125e6f42d89ced56fda. 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/QM48F2364503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf1e5491fd19cafee247daaebd780cff13f5a11ace137461b5fa6a2896364d8. 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/QM48F1657804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f0208ff71436f094dfa5d72b4d9ae5b9f917238fc08fc0790139e25631d9cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/VNA0R2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ca29c99115268a9c88d4ec2de10f40f4fe67393e1f9d4b34c210a32a0f6ef. 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/VNA0R2001041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e724114d4586f8fe15af04636c1c070628581cebf2b398f8127103a602856. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM4TW2090838.
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 0xcc5231deb1d1b87db6d4c5e0556ac6de12f3d8a4310e0010a9cd5121382eb789. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM48F2364706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad618e6e22aa8eaa27fc9b11a5b4659ff7ac06bbe34aae4bc6790ee7dd70767. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QM48F1659401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811646b13d51b0a45e22aa84cfb66d3c39039cff4777595ddbaad87f788b8cfb. 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/QM48F1859308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59425e9cc0a32033962ad01f1d47b108af73517861998d5e5b85739af312ee73. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM48F1960908.