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 0x4d5ffafd0d6fb4245c0150c2b7ba1339e9d7f19e28bc46418aeb0f7a5df9c2a9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e713cd9a-1876-40dc-b560-b771ea159435.json and https://artists.proofprofile.net/proofs/artist/e713cd9a-1876-40dc-b560-b771ea159435.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 0xb060dd8ed93a4448f204d6aa90c8708dd14249e416d38ca24dc43317247d82f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872364420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ccd7487da47ee3a8f7246801014a6c3d5bea2c9e15fca79a5a5530fa0a62f9. 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/DGA0L2387515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3609cde7bd7e28fc75132b744ec9eff920a35f10a337c593968a65cf07505. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DGA0L2387511.
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 0x2d7720b0164a964b17010b58ad9e2b4f5deca9ec9ba93f75eb0a9a8987968f60. 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/DGA0L2387512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a290eb5569856ae0f7779f4e90eca15858546210f55d6e4969f41c9857899a. 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/DGA0L2387513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4f897fb8bfa92559900a908c88300bb5a56c06b0fd7e30c4165c0b3b55c8ec. 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/DGA0L2387514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0645c93fe91f896bd47147f847a8b9343ecb68de81fe5529b99701053e1808. 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/DGA0L2387516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee61caa54c4e2d62daab21ef41eedcffec5597206af8e961b0b2dae2ed8fadd. 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/FR6V81083282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6347da27379a3de2162ef10d62a59158cc4529f5a1e48dc4f5bec59969a23cd0. 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/FR6V81083285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b87359072eaa663f32f3608ca4db238359b945e4e1ef4447bad40436981f9. 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/FR6V81083280.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3121174352fcdf714c646bf338c2ad67a3d520f1cfe26013a8307e46a371c90. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR6V81083281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5415fb5b94fea1004653bb2f2a1693ca057a2433f439c0f7695ffd7196e85. 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/FR6V80713952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703be92903097f0c002b8c4decf1856956d41c301a022dc7a9408eb10d15559e. 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/FR6V80713953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be81a70a4914ffae9e5bf5c95401c9f1157a5396a10e7bb635db2e970850d7. 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/FR6V80713955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efe9ec153691e3c162be4000b64df06a57e3038013da8846ff7d4b360858555. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/FR6V80713961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb16367a25558c1531019f7b192d09a026aeb1271b4cf9efdd0238d5f76729c7. 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/QZDA62245093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d2fc1eecff591ec554d8cd53564a6e125e5e44bbb710e76e8d09807d801b45. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA62245094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5842b26fbcf2d1774b3bcad983312d6252914fbb00c46d34de3b315e4a0aadee. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA62245095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbf98f2307c1b7502f269ffe92db95841c35797f9dc56666bbaa587733dc00f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:03Z), 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/FR96X1609306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb4850190c9b1bd6e806ce7e9a5a79df57a59532c7f9691acd16b685c170ca. 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/FR96X1609307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808f2189898baa20a563c42872eeed5aa086e9850cdd4bec1c0d68ac1177e62. 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/FR96X1609308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d01fc21d47a7f08e3c94980414b0ee5a3f1090b3f6b21b45c78490ef9447f0a. 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/FR96X1609309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaba9f523015731b8cf979b5704856a84abb09d564d11fbe833740d4c8d06fe. 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/FR96X1609310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee8deec5c06c0ed6c378f8b9f0dfb38eeefc5623046424aabc919332a42b76. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR96X1609311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82b8db47a3a67f0ef3ad4f40ae425e6e460ec0b4872ddbad58c3b701bd2a26a. 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/FR6V81226094.