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 0x0e9551474d69b1c22183e0528486fdd7d482fdc824b9cc27a8532a3d2327a0a0. 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/da7abd89-b947-461b-be8f-ecd6e7d39245.json and https://artists.proofprofile.net/proofs/artist/da7abd89-b947-461b-be8f-ecd6e7d39245.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 0x622ff868e81389d147a5ccdc905a97dbab4253ff097f4964e271a513d4bf005a. 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/USHM21900434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e35501cde1560cd8202482554804747011088b0d82e3cc4a4e068417d4335. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USANG2107263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8433906b92977bbd5d265969e98ff9d2b3c7071d85262c44c41deab6776765c6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US3DF2156717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78269c568f966422eaa0fc3b7072925616ee65165b13c63ec01ef830dd5deffa. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QM3DF2102440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd113561b1fdec2cef3b12eafda766987a9f332b3c730104090eab7e12bc4143. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM3DF2144840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ac73fb5c92ccff9c0c4c399421ef39255cd6a00c0b12114f06d24d840b206. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2230129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b976d68b66facec51385efdea6d419ac487c6fcc7340b3cc27a91be10a1cfa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3DF2249289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf332c65988ece5cab35247cc3e765d76bf346975a3670bfb5077dc9fdeb21221. 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/USANG2240290.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc017ca9f7e7d9da567784ad5498fa455aa566fea7d13fd740c2cc46e38c61f55. 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/QMANG2254443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aacd5be893dc3240f3404c6ac98c27b8d17c4fb4f61a148e75b4248a052783. 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/QMANG2254445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b373bf73dc4b51f0605bc169daba5645f3e11cac1f77fe9c7fd72c0453fcfd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMANG2254446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe041e97e65e5b3acc0d72c5e8ecdaecf4e5809e5f2704da028f32bc0486d14c7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMANG2254447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270efc7e974be19d517f9e2db0b7524813e023eecf1cef435bd17f34654303e. 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/QMANG2254449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd9b702d9f65794940cfcceff798573c4c402c546bc362d8ac7049e21187299. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMANG2254453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f0458ab8d546eba0bc0b9be5e6438df91765076ba067fa912b867c2c119a46. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMANG2254454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148ccc25b2ab13bb409307598df5eb43d6fcada9ff578e19cd4ae646127af908. 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/QMANG2254456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628e85e22c8a2400fb59c95095b8765964fae18c09da356a67e1995ffd6c75b8. 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/QMANG2254460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde12b22bfb6786a90ce1e55b264cffc925304be257da3f1cd487566fe2a1eba2. 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/QMANG2254461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef18c93dace3ee8f3b7400ed02805fa3d6e2b0606010e51610a8bfed5d7dd9. 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/QMANG2254463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6079882ac20df9813acef6a28735999db03b7117b48fdaf8a21432e59e6b3c8e. 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/QMANG2254464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9888eba5dfce81e83c018099c17ce2fbf23d20fa73db5d376d3ebd7945f4a53. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USANG2454660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe840d356d7e9ed70674641f65104c15c990e19da6599f283c1d90681e04b89df. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USANG2463246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc77ec0279d6b0b29df2019215d46d0b8bbe7fe9c29f81fc5790075158581adb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US3DF2536496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bac12b3d780755bb6482eb908ddde9a8ceff7f0d7fc3be710e742614d1ad207. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CBEYJ2533544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8e078a06af3ecc168638f3b3e45d07756f38948546b56a8a13765fefa7a72. 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/QM4TW2363628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e0783e0e76186b035c408e18deacb05a84721a61fbff1cc7b6edfe3824e3a. 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/US3DF2065666.