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 0xb07eeffd971c9c18232029a03b15879124fe7248659ec6a6735436d202dfc4b3. 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/c4140e1b-9a90-4980-a122-840eecff4d88.json and https://artists.proofprofile.net/proofs/artist/c4140e1b-9a90-4980-a122-840eecff4d88.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 0x43c68b979639afc6c4c5e268f61da4e389727c66e00b9f865dbe007d9d44b99a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NLP1X1700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a0390decfdad89690936f3cc6024a38724288853451e6a906a5f69f1992336. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU4551154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd996c4af9652539f86e2a7f532afb44e43e46d6894c87cf1e3ac6f0b8535c3f8. 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/DEUM71903046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41360a32d238b5d7fe531925d4bde3592dbf5d7e3a0031cca2e44c282d224047. 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/DEUM72002535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf05682851dd2345cf9194fd97559fc896015b7f7f9d504f8eec2e906332da3a. 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/GB2LD2010168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1369fb93ead129ce0bb793aebea119649f6408cce622c8c26ce6f75cf59924d9. 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/QMBZ92087682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691e31c0e20d7b85b500e6ba41de0359cb31235fe0dedf7ba20c08b829988b6. 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/GB2LD2010327.
What If This Is All Real, Pt.1 (Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf939029643399d5af49858f753c24c66abf0e84d82df50ad427668140f3b5d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USA2P2265021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbcd8e15837650ddbc3de6dcf689250a72a3e0a94b9bd2582473463e0f73b41. 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/CA5KR2323163.
What If This Is All Real, Pt. 2 (Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606c2e6f480bb6d249cf1aac73f7937a3f14da334e110cb83373d1118404bbc. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P2309680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029c1bbc6ad050a83d8c4050c0d464a1efa93d14d861682ac822a091a2b785a7. 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/USA2P2309676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d1df59c4bedca75cf4b51d5288d7164ebdd9be0d8ed5ed0f23b42baf21262. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SE6XY2344872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba304633d98f826a72ebfd4c2f680d9885920d728ceb24fc915ea76bf7ecad9. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:00:32Z), 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/USA2P2438567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d3357d736800b8cd2151707929ab911787025ea4d353a38d0fdd4101a3357e. 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/GBKQU2580289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8028b1975c1e68fab447bec34a9b4be7615e77c6c761fdf264b364ef664e0dc8. 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/TCADI1752339.