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 0x6ec08536c8e6a96768667e66a2857c59a6524f28c1a7fe9c0934478afb6b3e0d. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a531c8c-a4f6-4d3f-9b5e-001b1799c3ed.json and https://artists.proofprofile.net/proofs/artist/9a531c8c-a4f6-4d3f-9b5e-001b1799c3ed.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 0x676246ac45b8950ae68e37af8f47cbfc8fb23067b33a437b0769ee39a5c859ee. 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/SE5BW0000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a52d1ab5255296512d9a5d424bcc32d5193fdc5eef8c90db15180013d9954a8. 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/SE5BW0000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae668f4bb1936480dfa09021cf5aa75a15b9cba0cd0ac004d3132df4f2949055. 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/SE5BW0000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf90222880d17ca770e468c56a8f784bff219b9c568571e530cfc491a82de02. 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/SE5BW0000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c06eb3f33af44cb8e00dfdc5d804e9ce27a89b95fe34d475e972e8319aceba. 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/SE5BW0000316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c33569de1f6726935c3b70d7ff96b61d9479198b38bcf2f38397db914f5dd0. 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/SE5BW0000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6c78fd702603d1f3b69d16f54da246b7d397f178166401504c4b23a9e893e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5BW0000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace42b446670a8879809e07d620170856e8136d8983df3c1608794e44138ed3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5BW0000321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dbe90fd27d8af9ed6d378eda13e8b6de39bbe4d43e4717e10a6c1b09bbac5a. 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/SE5BW0000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89b0a584be40142394451e9316b4655c6f98eba330f04ef698836d1ec8aa4cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5BW0000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4abd45262f21ee9f4673f3fd2d00308e847d30976d19cbfe0b2d98f5e68bda. 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/SE5BW0000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded6a526d4a89b38a50acb933957bdebdcab0078273d4d392516b8ac1292229. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BW0000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf38eb05cd2601eed93fcfdb559f5e717e6f6891a3f0f2a31aa81fabe82ed76. 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/SE5BW0000335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca09bdf4628e5a055fb7b88de06ed0204f072256afef75fba5426743ec16e1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE5BW0000302.
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 0xfb36f8a4e35c4ef3fe34e0682c86bb230d5dbb7ee9f6e8e2817ba6400088f8a0. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE5BW0000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc035f74d073d1c405d56360c2f55fad2a03baad1c5eab7f80afe9c44e821a0b4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE5BW0000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6330a59cd0eded89f0a311592db6d6ff5d88162a042ab0798ce7edc505d7e94e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE5BW0000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4a6c6ed94eeda40de030dc88c211f1bc0b06540219fc82db9b715db768888. 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/SE5BW0000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bad2b3fc0282243e03f819660480eb0f325d17fbe0731ff5cad6496f14cba3. 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/SE5BW0000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66a4eae94c03041a18fecb9d3849c71e0253037976bd8d6d2971d08c2d50ff9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/SE5BW0000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b376dd345b59a246b1d87396632b0321413970f806ebc780058f479f19aa041. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SE5BW0000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1282a4a1a9e1b5eca8e81ae1832110c4efa6126db0ffd7a5d5723e87a6408. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5BW0000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b83a16abae051e529bc16d51f9354814b1c400ecc8fb530292fc466ff3a208. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW0000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3b7dbec0f58f80a6d5985f05f59d2f2b1510483a9198b9075a8e0c8d2b4345. 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/SE5BW0000317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec22df7222e39cb648bc426560541e3470e4e0cad57a2f48276361af6a2ec31. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE5BW0000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f17734ada862f2fea043afd1629a95fd13a1fd7ef1f03718ae2a8303163c84. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE5BW0000324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411104729799f440f7c7dceb1be190c97e7740c3a2a261d0710537da350e34cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5BW0000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9e3eeef3d13f25a5043a1bbb29680381b2aab2a9481be61fe4f3d8280546f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5BW0000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6855dcc137574e56af9d497a10dbe6cbac025755c59e460e8a0bd43591f16162. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5BW0000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4566db5850da79ecfadffb075f1bb826f17584ef1ea76162f4f7727e1aa8e86e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5BW0000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16745a6394cada5656d791fa120586c1e54ecc68e551642d5db20c46c71d7de5. 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/SE5BW0000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e72d1ddfa13c742101eaa3a611c6b5f276a9146a9d4f347649cc856d924681. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW0000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300b8e85cd2276ce6c91141b1590c687c5b1d88db4f93abb353089f966f761d8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5BW0000332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe46bcb2817d6c33f6bf4e830f2aca7b5bd456a60f4094ec33628b319cb137. 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/SE5BW0000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b4f0ae1c1f3d8f0e1e790b061f2b5fdccbe794e3e0d8a9631040b8cedc5242. 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/SE5BW0000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b7eae5662b40513ad4fe244a44038080fe3060891756c9c795d17c4d1bc25. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE5BW0000338.