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 0xaf654748b153dd9d6d3bb37510efc51982cc0acd31705b59167f15e1b434b9ed. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a695d4eb-aff7-4d64-9145-bac828c4e561.json and https://artists.proofprofile.net/proofs/artist/a695d4eb-aff7-4d64-9145-bac828c4e561.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 0x250657c5fdc7d14e75e2ba1787fac8d530df0751e515a5d159fc2952d62e55f1. 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/MYUS12220245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037001cc228875739093bd6f01dc9c6f8f7b0d24de83c880544d91490f2001f5. 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/MYUS12222271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb010f4cfa491454c78b0ddebdf035431116066c8eee8c2c95d4d765a2842de. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/MYUS12220252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae85cfe9ba16ffa78becc19f8dc50ba4f18df317b8b187fe944cfa0bfb61d17. 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/MYUS12222255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1354ca2c97638073f48e5c7194804cbac332e22f358246f9d7b4b533892d6312. 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/MYUS12221724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951eddde1242cbffda52f6403f4fe4a14fe16b79f2d4a4d8ba5c8b8b36a53654. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MYUS12220079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3be18a92a0eb049cf6ae30defa54d5bd6cbeb6fbbfa953f2a7481f2c3d326ec. 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/MYUS12220080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc824e41c18bb6550f9f3c0b9885301755160c5f0c7ff6f9bf0a27caf7ad94e. 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/MYUS12220081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916b091c7ff1d8b39360d290e75c6f478c82b5eee1fa910218f20ba10d54d2fa. 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/MYUS12220082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbea7022b6d084071c7bd0efea69cb64832fdeba5001d2432f4e8a332bc5f19. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/MYUS12220089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f8c1a4fa1160e5c30c19982ebde187fd1093161f9f1ab9b1af57b9d6895995. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MYUS12220090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c989187ab00260de6a358a2195f27552018efa20f16f58e3dda9a1d466d01eb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/MYUS12220091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bed54b6f3eae07e944f9e4c37ebe134824b921bec4f54431c6a93db30585a0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/MYUS12220578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e3eb32114b7f446820fb7144d1a05ccbe7618ea5180c8484be27ced6bca9b5. 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/MYUS12220582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e0e8179f5d3b5901899339ccbcb5b34bc319067c657e5c5d60991842c20291. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/MYUS12220590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa467b350ac71daae2b064a73b4c9daf77f500ebc81ae5f0086fbbc81b96b0873. 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/MYUS12220268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff95c4801a3575f0d3c7084ce84512a2c4820bb66cd590bfce4165881ff942fe. 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/MYUS12222387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f18d24daef14940b572d6c6573e366f202fb90ab9942e5d0372e59ae2d66fc. 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/MYUS12220166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a6f90cd9e2f70a36ac65b894ed219a47ebd99bb970adbd399000fd119fb6a9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/MYUS12221202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c3fe41b195679ec4c319ad9599a818ce076d93180ec3a50f8e7eec1774377. 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/MYUS12223734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e70f67dc8a0f6b84ccb580c962fd1bbb22b1fd9790ebb09e0c02fdc16777436. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/MYUS12223979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047d441efa72064f99c6ec4e785fba70c6c91753f5ed98adabb31e6e3c678a54. 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/MYUS12223225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf96caae1cd593b17f4d2d70893bd87c4b47305749ac277b6dc7fa2fbb4d7a. 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/MYUS12223023.