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 0x4650f523f978ca51529096e2285b7712bf4a3b1dacf30e7288bd3a3605f4f9a9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9fb14d9-4906-4c83-8349-b1599535efd5.json and https://artists.proofprofile.net/proofs/artist/c9fb14d9-4906-4c83-8349-b1599535efd5.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 0x1eafc026bb362487de370eb2a75fea8f311b95570b7903f56640b7a827819bd2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAGJ2248377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe546f809a2442f3786f8251bf342fdef583ea7483a4c1043b7f003d7f82c5aff. 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/TCAGL2222254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55af6fe25571eb5480def86342bd2c0bd062a1cedb2436a0b81fd4772ad94f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAGL2270710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289ac7b2df8eed690041b52567cdd90fd3e467b645b920a606b69803fa9733dc. 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/TCAGL2282223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15abe79405e4102281ab3de273558a02f3544001443a3c1a847d8a699920c9fc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGM2236378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a2a1a4a1f0f750a6a158e3994d70c6b36b79eb773f3ff18d1c0bc70727105. 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/TCAGR2227006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877d3a7d6cff1407d70b4f76a8c3dd66df1fea6c1d1b8c27e361e7625846511. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:22Z), 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/QZLBC2202421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fbcb60de5d3284f0041ece7d4d15c0901c8b5c58237becb85c7c348753cdb8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZLBC2300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75573864d24403f7e1e082eefe08f050a796d1c4b9702dd220ef5be853a06cd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AUBEC2355674.
we can't be friends (wait for your love) Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bccfe05c578769f6e320be23106ffec4eeb9f9483ed96c0003178bf35a3afd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:49Z), 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/USUYG1543668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3144b591a2c2a4cd4e556c3d292cbf23a0cdec4dee7ff1142b9233353d5bb73. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6P2553914.
All alone with this disease (Fight Back)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76dee2cad5985566b7b43a3f98cc57e0fc5d0c32f1bf1800d5743aa9846c72. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWV2502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b2e42ab095ce9a4544b250e1377838db8ef8440fe0cf817ec396edc9b4b75e. 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/QZ8WX2207300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167797c938983007de5d6e6238b951598a090ca7616a0367e0700ec415d83cc. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZPJ32266144.
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