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 0xfa46b2616da0831564a65c620c28e6f488240d9d09a6fa34078ea2fe69bc8f02. 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/d4332dbe-b760-43f4-a91e-5498f4020cc8.json and https://artists.proofprofile.net/proofs/artist/d4332dbe-b760-43f4-a91e-5498f4020cc8.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 0xcb377a7eaf13cf54a4d5d87e0652996e686a69286071245ed9ba2582a36dee1c. 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/NL1AP2036756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e54f5d52aa15683d8112980b4cbaf4f0e6a1119b52d9ac37c97d6e3090ec22d. 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/SE30H1507121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c422afb4d9b143e6658cfb3d4b34062eeb34f9aa670b407dd73a3f3abed0c23. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLS6R1887524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281cc667788d7050923ff2e08611282d229b2b69cc9ec7b701eed02983cfa786. 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/NLS6R1851219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79aebb8a628e9bcf9b84a7e64a2ce1c2ff51fc1eb179fa7f0ce2151dcbbd7a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:45Z), 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/SE3OH1619759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb8d96b1a814c0769325f1ccd916271518476213bb3152dbb149b6e6aa32fb. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBKPL1785936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45d92e17c3ede38d1b9e1ab81504ffa5be45fc171cc97de2a470fc29700751c. 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/GBKPL1898143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd06f3ad9332d429ffe60311f9971b774eda8504d90597f020ca11e827f9916. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GB8MX1800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0305fd1cb108bf7e3d6ff294b5d82427a405a3736e25a3ed877d938e7346bd7a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GB8MX1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a249a501d942ec4704896c12a17c0b8a2025cf45c5a0d66f15e88438f9533cb. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GB8MX1900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d66a89a5e74098379eb76da25d9d7e2f6ceb8a172faf3317289650c8098907. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:55:14Z), 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/GB8MX1900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ddf946566a5090d98e0738962073add467f972b155e6831641fbf5d67ad36. 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/SE59D2008501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ba8a87653e920a99732219ae8bd4d786e8692d3969baaf654e5a3b9d7f9fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE59D2123001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ba8a87653e920a99732219ae8bd4d786e8692d3969baaf654e5a3b9d7f9fd. 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/SE59D2123001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203fe858c33b6fb7b20d4fc7ab49069a5015c8659bf35db4e17c69195987c897. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE59D2129701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3a9509b87c47df9c382d00e1e271984efa85f189130fa46c5d3d26f9ea32b. 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/SE59D2137401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3a9509b87c47df9c382d00e1e271984efa85f189130fa46c5d3d26f9ea32b. 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/SE59D2137401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b82087c2324dec5147d9002b4d298ce6b80d160664fb36c1efe6548513407. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/SE59D2159101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5415ae7bb6c269c17ccf02bb9985d07d193c9eb6605a296b18d0d940bd9d4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USCGH2369316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbd12d3a860aa1672edd0b53754293180e609573b517772bbb8cffa6dc038bf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH2369318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdd6b70d0f4d0e28ef13652b04f3a905d9ebb05e4d09fa801f8219868c996b1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USX9P2314334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c3a2c85a794b90b8939ef8e214f8c77f192968189d870e321506e0210558d. 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/TCAHY2421344.