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 0xd23167e4b90ac1456d6e1a031fb847e978d2914c90922da055c767178c3e682d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29462ef4-161c-44d4-8205-4fc95af35e45.json and https://artists.proofprofile.net/proofs/artist/29462ef4-161c-44d4-8205-4fc95af35e45.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 0x93de32b8fd91ef0a2caf81c6bb6fbe003a105a6a50a62182b0fc9f4ac64cac5d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR10S2475713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fef1a39577516b728503781c4f4133ec5761aa4153a87c341ef4cf062c0d838. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX872276211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40250cfe4121f0f5cabb990781356bb90d710606fba43e5fbabc45d7be966e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42221649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75248276d2b0a1e88c468dc0d913f310b6c12261d9357f01eaf3be1697f3ee98. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRS182146427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b0c4cbbbb55d85b43b67478cb016cacfe8441a5162032cc264d7b2ac715eb8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MYSN19000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe6cbf4ee8d70501091b0e375489cd922f5266fca46f7a31234497c5b9d019. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX452246502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe830a453305f3e085ff0d22e0bbeebcd75092e059adf62140893cd1b9f0da83b. 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/MYPI11200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e66de3b1c8fe5e2f4458539cbc67508f674c4f7cfe6b6632de5825a462574. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/MYPI11200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493f1e081ca62beb9be3bbfa472abae88756ba342f326c76aa0a5761b494378. 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/MYPI11200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5339b4590d52d517096a11be71da02a58864a85e3224520f3f73adf03815b7e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYPI11200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a16541bdb1123dafa11b234edec3f6aa07ef9fab4b6d1a0a6e5495c450d6d0. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/MYPI11200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e92ea8b96727566a888e3dbd5bf744735641a86c39470fd1821c1c23dbbc135. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYPI11200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3439db86bd171014a53aa1796eeb7823fc15ccce954116be4f14c8029204994. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/MYPI11200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5f58003b1128013182046616f0b648d11359d28d29bd38f5d4bb7de6f31aab. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/MYPI11200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c0a960a0bc96a7a9c594af2ad16d6058ddfef059473cee0d66caa1a6bdb844. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/MYPI11200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720149dddcb1514caa4c5d9ee46622310301962fb1145d2bb63f2d870d0341b2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHN52346709.