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 0xb0b85825501dfc75b41f8aa36cdcd136ca4ece6f5d576cebc6b09fc719523fc3. 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/dfc503fd-b42c-4c22-875b-4fa8fd7a7677.json and https://artists.proofprofile.net/proofs/artist/dfc503fd-b42c-4c22-875b-4fa8fd7a7677.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 0xb6f9b49d64c7332b7dd2c42284216e6ddbe2371300b02f8c40c6fdcbdec8b189. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:50:10Z), 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/DEA310900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda33c8e2df3c936350eb90d48d193209b1f5bfcbd939e16516bbf7b6c9c723. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:43:40Z), 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/DEA451308010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd65cb16cc0fe234aa000efb2aa3ba4fa77ecabeb99ce05e3816b1958eb6ab9a. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:46:50Z), 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/DEA451308060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e22d7f942d918fb776aefd6e508d4a263e12436a05bf5f4ee51cac5af0a152. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:30Z), 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/DEA451308090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abe563193b69cbf558404e46c228634a84c8a77f9122ea631901c8ead1b1d1c. 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/DEA311003630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb8476f467d2eddc185416ba73570ec4c713e1e3db2db441475bb6acbb151f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA452403180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13cda67ec23cb2cedf5a70e5c1540e13f1701889d5f8571864aeae50e5c8dfe. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEA452403200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb65c7058618834e2dc4e806f495184e21a85052abc53edb2d047bcd07d35ba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEA452403210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb8476f467d2eddc185416ba73570ec4c713e1e3db2db441475bb6acbb151f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEA452403180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff690fa17e39f4e90e681fc0ab90b8804ec9d2f4105e53a4365e1784509f72f. 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/DEA452403190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13cda67ec23cb2cedf5a70e5c1540e13f1701889d5f8571864aeae50e5c8dfe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEA452403200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb65c7058618834e2dc4e806f495184e21a85052abc53edb2d047bcd07d35ba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEA452403210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc75e382e48695cb69935f160165bb9470b7ccddaac78b509c005e0cd472333. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/DEA452403220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc01da872a3fea3bf837f947a582b66e1274528da59cb59c9b626909e61fddbd. 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/DEA452403230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58907d124e415e0ee7ae59b9ee5011aa9a4817faeb44945ae413ceabb761bab7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEA452403240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9262464652f00debeb3fcf6a6899da1ab67105f451328d59a26317a06add80db. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DEA452403250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4750c0170b0e8e53c91f8740792adea27c83dfa8cc4f4e35389a6ff542835695. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:37Z), 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/DEA452403260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b05d56f924f79e4046931f0db867c2b885e0fc74e8623fdd0eac312e742d7a. 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/DEA452403270.