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 0x6012ef4fb742ce94c7375b19dd778691be25e7d0a799f4ceeefcf20471b5b2bf. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc9a4ae-519a-4839-8d75-c5c43f2347be.json and https://artists.proofprofile.net/proofs/artist/dfc9a4ae-519a-4839-8d75-c5c43f2347be.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 0x9df9c08035b6d9a044a794093f94926abe8f48a6904d82e5d26358e252435074. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZFYY2150365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76295ab0da7e6b3d9de692a353fa198fe678d0b4a09ee76cf4b46d50e3928f2f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFYW2146374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31c094c4c4e9cb54aa26ba0ac5a3521922f82be9d17c1c56501f4cafaa76ac9. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZFYY2150366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6700cc0efdc70a618cf5e555f85f85f3f1de99398fa55495a8e192d6c3dbfa5f. 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/QZFYY2150367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c252db37772b5ecc00748db378ed83aaa5491e2263f45608b5cfd2e8ec4d2f6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZFYY2150368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b14067e810f1122a3183d2b0ad2ee17fbd196513abc10846d1aaf9ea89b2912. 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/QZFYY2150369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01197403d0e804c2ea1fc62afceb0ea45bd1c0a023d5716a33c29136ac4c12. 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/QZFYY2150370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53120972acc63ccfe0ed806d034b97153563d883f2b56e2e037e9dfdd6063e80. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZFYY2150371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578fa4c688e366c969e6f1f3dd47bee48df245fbc70c677da2aeea035160871b. 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/QZFYY2150372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb092d9928fea890612c82ef4bb2b499af189c9261e08fd9d7bc7095557defeb9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZFYY2150373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568524dd1453e875cc3a16ee4aef0e6173cd3337fe2c11bd2326ffc783bcfc30. 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/QZK6Q2166655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76295ab0da7e6b3d9de692a353fa198fe678d0b4a09ee76cf4b46d50e3928f2f. 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/QZFYW2146374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07c9a50f8f6d3a98191430fd6401e6be84ed2f6d01845e9b312bb6898bff4fa. 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/QZWFF2490535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc41ba508766a968cdd1c9f5c24a6cb2f52fc5758291ca3735365680fee903c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWW2426534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02e002177d400917fb3ff6855a16d67befbcb676e3c7c8de638566bcea217c1. 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/QZK6G2476104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea3ab9369fc0b34bc647e596fa6ea70a65cb7efc3351816e744f184b7bb081. 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/QZMEM2442483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4532edac4300758501cc8bd27cbea02e55ff949060202d902422b779558931a6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZFZ62414302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875167451619e7a195078f871b9c3cafe0eaec3c28b40500938e39cf06470199. 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/QZDA62348608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61817de936f082c510126581dbe5464d0b395f912ab71f758619cad8ba40913c. 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/QZK6P2239847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be44c0b4446fd32ee8f45bfddc2101d70852e1bb83daa7124e7d8298239d66. 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/QZHNA2275228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e4fd4d215551622861e864f6eff96673e8dc02a9d6420153ea23af1df8388. 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/QZHN92207418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09222a9ec0f2461f40b82cda2a31052ae36ff94f74c7afb5c7eb7804b7917a5f. 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/QZFZ72290063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab0ba3edd514d45de1f3e0166feff301b1eb1b898a748a3c5687cacd7bd27c. 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/QZFYZ2254951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5aad8b7b0880639c06181889c6faf4bc16e4d65b53a1a001532e93b703673a. 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/QZHNA2014541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db5e5f65b90b4357b82e63f4cbbb2788ea6bb72fbe3071e2bf7a6c66952eb5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFYZ2072210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78967b4359e10225dd10644b08b753375e9000880125f49c8d76501044b3d2f8. 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/QZHN92052229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4000d20e0b6a577f4d994641592de8a1a1a1a2219907ebb911d48cfe333619d2. 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/QZNWQ2066479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8493e8b7db9109579ec5e2587ea7258abbaba778666e17f3f9380edbb1d52c9. 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/QZNWQ2066484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0804a42d7eae64f39dcb1d43b09b25954c404786ed53b7ad660fa7a47a35a24. 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/QZNWQ2066485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b083e2da437c972619256d6132ead55971da837684c0db63a0d384425fecb. 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/QZK6N2311640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078ec2d54a386f80cae17c2980d56becd1d0e945792548772d1a9ae4a42c9523. 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/QZMEM2092908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebee0fac8eb4b4882c326459f24c16b47ac36fae7582a9f54b30bdc885b8d249. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNWT2097884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1702039367099b4be5695a54105944a90214f42319115f95762ab918687af. 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/QZNWQ2123065.