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 0x0ee185e1147a671deda925d3e0e99e270e50596f950efdba4fc22e3e9a983d84. 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/19318b2d-bb92-4565-a42e-eea3df89fed5.json and https://artists.proofprofile.net/proofs/artist/19318b2d-bb92-4565-a42e-eea3df89fed5.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 0xd3c6f843873d8dcbf5252f19e0e37629722075ba57aff3002f271401027908af. 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/QMEU31609090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2699d6cb0ae2ab986a6ddff674d4f5c0eceb7c002ce6cacef72faa95dde28f97. 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/QMEU31609088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bce6acabd18fa8e92b4a9227bb97aef2579c23b5f39eff9ab4c1be6a0a81319. 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/QMEU31609084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd795ce3abf8e92704ac26bf112bacc5044810ff651f96a171234e13c5dd8d43c. 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/QMEU31609089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a191fc8df14ce575ad56733334498fdba6379881683044dbeab97dd54145b2f. 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/QMEU31805055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa33e32ecb23988aa54c51d8aa60ba59583aee970317867d95b037015275cf9. 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/QMEU31805056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993ae4cb7396602a84113495244f7b47d21343268f10ff7b8e8bb11d208f237. 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/QMEU31805057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04bc024a2933a0c8c3b07b93d5ba799e8179b63fcdd266cbfcb05776cadbb17. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMEU31609082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc6fd0bdfc89c6c4f8b831b6f1caffe3b9fc185bc3b99ea3c36bce23723a7c6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMEU31805058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f67f8a9efc43fff678cc5b8fe096f49d07d71f7afa94343e7b7689dadfe05. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMEU31805059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6f1108d6c6b85fa0a33bfdd887ee7232957e7102d009070ab5a0fa27103250. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMEU31805060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4454784ad6b8b3a0d7114d5bad5e912188a666a707995ae3c9506db75916feb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QMEU31805061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31a89f70ee4c911c604af3a410eef794ea091afc888ce3c4d6cd7f034ff737. 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/US23A1555071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4f6ef730a156b7db6515096cfd9df273407e62fd1bf713e2dee9f827c820b4. 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/US23A1548490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e2f25afacf0f75cdefde87f318fabd0572f47760bbcb4611099d0c2847fa3. 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/US23A1548491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e97cb3b7e7965362cd78d979ce98bcd04fce9c2d4c5a3fadf1f49221f5f840. 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/US23A1536038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64861dc3b2248443e15d08ab87c2f9b29257aeb8928955d7b6c8c0d399d7a3ba. 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/US23A1534295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea2a8e7e59ae23c0b5b6fa085f62375c1c81ce1fa128ccab26b1ec96a629fd. 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/US23A1512085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97f65be99ea8b4d9000cc9aa7d01cd16dd98ab1dff8a6ee7968506e408929cc. 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/US23A1502095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561549db2848c97bf4098de462633fa9607ce68b7639877d4d0e3f513ae9fdc6. 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/US23A1501487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cc28415a001019e434d85a85316ba71b69b41f788177091c25bcd82cd570fc. 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/US23A1501465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d2282a322a0680a11fdb36a4118faa93805c56f1265a9557b1075ed19cf4a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US23A1501466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cff0e50e1bb4f9f5db8c2bc15dcce8dc81483b192120e67b4964211224ec9. 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/QM6MZ1918002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99997855e7f0a59d6fd79102cce663aefb418e77bfa5ef23365a63ae876ea6f. 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/QM4TX1997601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3bb003e0eee9abd37b1efad0401bc227b464e53eb4a4142017b774a7c57e9a. 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/QM6MZ1918001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe839307de587c075fed7b1c7099258d71763a195e9cd713251ab71c4ea6b3556. 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/QM6MZ1918003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27fcae647eddb4a0ae8bf6bf86bc575636be537320f5ffb2ef551a56790450c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM6MZ1918004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cff0e50e1bb4f9f5db8c2bc15dcce8dc81483b192120e67b4964211224ec9. 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/QM6MZ1918002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99997855e7f0a59d6fd79102cce663aefb418e77bfa5ef23365a63ae876ea6f. 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/QM4TX1997601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d59ed7fc0ce1dab4ade3db7a08d1baa2e12d480a03365c1385c6eab42a249f. 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/QMEU31812333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd795ce3abf8e92704ac26bf112bacc5044810ff651f96a171234e13c5dd8d43c. 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/QMEU31609089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e914c7982dc8d7adc94acce88d635f602211694f5eba97bf72f4f2970ce33b9. 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/QMEU31609085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec03ed7fe9fc503b526c4fc77d2e1d45de070a1338ee70d6fe2274d83461cda. 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/ZAP541100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147d26c9b6132de0a2bfb5f78e6415590bc8f5671a38c2c0167c44c7fd4b8be3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NLF711701692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc631ff3ee74e3ed43fb6ed862b727079ecd9b4f68db7657ef2019a7abb0bc2e2. 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/ZAP541100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab29c6ff2075cd7c76adfcf8a7147264649ef87c7d32295a6fc3f8e8a3c766fd. 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/QMEU31609081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdffadf9da8550ca791b1aa5b261af2eee944549e65831a1c57709c608bcc1b. 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/QMEU31600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeada503a4bb6202c24a8520a3aa837c27ea22697e260cafd68bc00bf37d40b06. 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/QMEU31600988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe66f9ecbd98d98fa369597fb4440c11af746af4dbf6ce270124cee384209d86. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMEU31600990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afa0886dc258100f1e5d18e75a93a60f366dd6683ad700615a17e65772c1118. 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/QMEU31516488.