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 0xadb07289b8fa8b7164baa6b43c446d9256c3abb7a363775d03b3851803853fe3. 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/c59c68ac-b1a3-4595-95b1-406cc57a6a3e.json and https://artists.proofprofile.net/proofs/artist/c59c68ac-b1a3-4595-95b1-406cc57a6a3e.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 0x1740a3946499c5fc5d41e04cd84ac26532a6182d99ce6c1bcb0d61594b495b59. 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/CH6541888484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349aa4e5c85681b63e0bd4cde53c678d5bfe0c360e41e40682259a6744f1887a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CH6541888485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade2a091df1e275f9a7d981f2637f972ab742f450dad0fbcff7885cea987e0e. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/CH6541888486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dbbd9318d6600c3ebdb86c9120bec74a4ae002425264e95fd647ca54909555. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:20Z), 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/CH6541888489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1d1eed4d320864c97c1383f740cd885658c8f65f0d00d849ce8ffb8f6f4e74. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CH6541888491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce78c9634f0ed2cf2fb0752a14f763881339a74e694f3d5a5a65c75ba6632a8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:27:57Z), 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/CH6541888493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe722ab86e345fe01b122371eb3092eebd3bf3e6fa33c36dd496f21fdbb15f7dd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:07Z), 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/CH6541888494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229355c407519d7587c31f4866b62df0c2e3256603a5535300f10c80a45cb9b. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/CH6541888495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae6495af0fecbea65e6d20fe2cf1cb53a80095773da377e085f435564220d22. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZK6Q2054972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578456d39c98ec187ec4487a37205b30baec091c9901b2dfb074dee20aba254. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T05:00:47Z), 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/QZK6Q2054974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd01c485203a8fdf6b60ce156659daf4c712bf8575491b6233ef8a2ad216bbb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2059070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf434690e2ba4eff32e0385e30e3c5acee10cbb30e85b1c8d7be1de22412759a6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWT2164462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5acd39cc27181ab52708b92965ef43256c72acb8dd43b540f35207d9517889f. 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/QZNWZ2480162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ba6ab58510c5256b725dbe1ca94bcb845a77b6c4afd9b9501aebc65b6b5d6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:13Z), 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/QZTB92403975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539617c907e1b4c5479e2e28f299406c6ad68004822c5bf547b0a6e68512141. 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/QZWFG2431953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c948b4e9e85b42d35cebb1e3aab923331319c2008d01d624082593cbef87431. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QT3F22467853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11fb6e5300193bcb0d7eaa3db899431363be711a9894b1b63ffed0c0c1362cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ62506813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa463cc545206680a34447691f629ad2256d032b29929d53676fda64d9f5b96dc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB22553918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe844947b00b1cf9f5cf1176ef1f905f8906350ed5f8963ba380b3e32d556681. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:56:47Z), 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/QT3F22519860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d31a3fefeec787a5e1ee5533a297ad0e0268954f89e8baf4db3e34bc050a64b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT6EB2507105.