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 0x8cee68ace1b7e3d1dd525739e5b0b858dd1cdf65b4a08b90f4825d144b2f1ee4. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/876f43e9-79be-4213-90de-8815ccc3aff5.json and https://artists.proofprofile.net/proofs/artist/876f43e9-79be-4213-90de-8815ccc3aff5.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 0x32056277276b35a7603e306137c33513dd833f8c7142c8c2b0055ab6e39bd6d3. 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/USGC61600779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc92a2bf20cb4a6057e69d9d326b8e4b2a087aae8ca3637aa9f358363f63678. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USGC61600780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681374eee07ebc8b68c1a123b6397c689b1fd314497a615719d1ee403c4592b6. 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/USGC61600781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f614988a064135228b1d078fae00db84310287311526f23c23e1319301fb3e. 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/USGC61600783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20526e366d3dc0ad3403da314360b8980471052c4e3f55e594aa8a5a1dc205c8. 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/USGC61600784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb2b346c80538930fab3f5c72483e5ff30c0e3138b3cdef2acfbacad2d62d6. 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/USGC61600785.
Keep It Working (Jacques Renault Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279c3098ba2f634832494e377c24da2e35e6c71b79fb3112f141442a19074a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USGC61600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4352b1f99e62bf8e04ef49f83038ac7e140224cd5f476d65dd515df1974ef97. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USGC61600708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed07c09aadf8d46e82a356399dd3339b51c605758727cb6c9134128810279e9b. 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/QMBZ91640450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a9c1c60c4ec5097f7eb9b782a7cc378179c4dc567a4997ad187677d853a6c. 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/QMBZ91640451.
Gilles Peterson Presents: Brownswood Bubblers Twelve, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0661dcb7df879f451b840e6c3ae7eeb64d3a94e7c3014fdc4bc0a67b0296e7cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMEF1600952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed07c09aadf8d46e82a356399dd3339b51c605758727cb6c9134128810279e9b. 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/QMBZ91640450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f415a1b14a49ed09ccd402ccc22ef10e37a19a084592e506fd08417fa7296e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR10S1743195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ed0d8938f8a75b44aabd4cf884223e2f3b8aa60c7aeb85827284e702daf55. 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/GBMEF1600956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5074620840de924ebc59217bee830740a5448d4a6371a93e4af40f895c216eb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES7381500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360eaa32dd584f9ab44603b667052f7c0c0c8a2365b709bf22919f908c7640c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBHN1300039.