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 0x35c4aa58e7b28cc6a78064b20a327456ba58b8fdb1b523ed70535677733fd93c. 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/cf086c06-aa70-4cc3-a312-ba8710c1fac9.json and https://artists.proofprofile.net/proofs/artist/cf086c06-aa70-4cc3-a312-ba8710c1fac9.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 0xa5661678f85783c07456040e5b54ca1519a5f3399f7b07e0f03f1a7f3e134db4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMYX21100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627183856bbb3efe198199393c99791541cad19b353436fbc4e9d792eba8261. 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/QMYX21100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aef0e08100225ce1bfe6f17f468cffd5fe7ecd86c61c1af593c981b1f2eaa7. 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/QMYX21100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b503a5cbda6e887b738833b4f23e28b9b123072758767fa17cad1b29507dc0b. 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/QMYX21100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f4463837b25ff60c7935520683c1892f9a6ef6db271f1a9e594edc7081d64e. 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/QMYX21100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1641cfbc813d7eea15f85ce6763f93fa540d6688be3172ca67532bf62770d6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMYX21100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6068d7c38e583203e3f67218c957caf94f3b82ee4f93d083e41d33c4bb06a. 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/QMYX21100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4669fcc9db5075f54cefd24c9470968e9fb17269519c2a39fed48c0db9588e94. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QMYX21100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc403ad76d70e03b1c26bb2026fe88d4beae1e998e555a0dcb0eeaa93e9da6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMYX21100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604bf2df890adee6ef94c64c3b30b14171dc5780c27c4749a2a3b1ac395759e8. 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/QMYX21100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e5a3028dd726e47d1665432780a2fa5b2a36230ff288a3bbf0a7783893ed3. 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/QMYX21100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d4e7ef0ace4fa1bc3bb8570aebf67f133a7f6017694ec7091ae37bc84b5afb. 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/USHM80576993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffafc0117e638a4b6c2c49012636b620901a90bc11604a372980b0740700694c. 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/USHM80576994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee260a07ad99072218fd9409bf347805023bdcfca0e865d830604c97f766e0fc. 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/USHM80576995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3958e7ef746fd01940ff4d652e85d8a92f7bfade29f3fa4ae17babcd37d348ec. 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/USHM80576996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c6f739facc7a4055f72da76628ad2d0293dc72e56ab5bef23c7d1f2f85c96. 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/USHM80576997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f2acff8045cfb5f337d90899429b29ef16c5c6ae39890eece06203c930f15. 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/USHM80576998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680c58ba897a23c944c607b733ad77b1a3a753012e020c7f166f84773ec4c0db. 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/USHM80576999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a900bdf30c9b451f4325260dc40867c59a9832b92727ec3e671da8b5140c5. 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/USHM80577000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a62659127cc837bd492c1c2dca5aa1f78bac8506138df20aac6266bd6fe8806. 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/USHM80577001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f148d958855742a94a88a8bd28c2bf0b20a0d1c53d95fb26c839ddd326047. 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/USHM80577002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3b6c949cebc7731c9313cb234ae82a94a7e397fb8335cc79bf24fadb7ff754. 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/USCGH2192009.