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 0xb118f67837975386ad00b02107731446ad3254d0b7f36e73ce1bf60e3120a35b. 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/aec301f9-b2dc-4186-9f8c-3e3655992518.json and https://artists.proofprofile.net/proofs/artist/aec301f9-b2dc-4186-9f8c-3e3655992518.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 0x39f1b4a82f051cf2fd49107519eef12713e20389a84f02d89e1ca1d42181e1dd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6N22244939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6427db93572f7851e2905de5976f85258be0158ab5af058d17789c513fdb80a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM6N22244940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ad1adc0267f16025ea5baabd51a82a02611d02efdf839c9a2df70b1389b4f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM6N22244941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644de1f77f06397d06ebf6fb9d3c5559a61d8893eb4afae81dd784fd25cad75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6N22244942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039fd5dd3fe5cefea83d8b70533d62a9ca4af6201d11458cf5f77bcaaaad8752. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42214638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4eb1a6763ae88a623c80daffbdbfd84dce6b068cd08609ebd2283e5c47b06e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42214639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1891ab43578dcb921b5c187dfa6d42967e371c71828bf086e8ce93a880dbf3b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM6P42214641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd4497514f6b40a537e53d530568fa8d4723b34215f9ef1756e32a0a9211031. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6P42214640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9163f90e6b172c2c575025da651c0a6d0a274b8c1b8b04e7327fcd479282739. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMBZ92291873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e2ecceb2895d66889d36888b04bb82624b90559259f2c332dbec5d6ccae7d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMBZ92291874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96a309f7d61bda874a80a4190fd87e529b7dd16832635eac04ed161b52ff41b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72208658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0511379b2e5e0533069d1d5eb1b482836b4b5d485c4ef7b4acd5259c180e6544. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA72208659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2749a4797a0401bcab67d550d5639dfe84cc77167f4f26f3fb6cedb0765738a6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMDA72208660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfa8a71bf3a49343dec57234cd1840980fc1d24aef93212b6128e2eeb79e18. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMDA72208661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281866ffad6491925289470cd01d43b6b56776e209d98e23e0e9e0a04fd8010f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72290081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce6bfe06c90bc8fe4889f973c37b39acbbae2a1d36c036c8704fcd828f0feef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72290082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b642709f9640a7095b743271cbf75a76c17c072c9d34671cba6648612c622c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GX3HH2541434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba78a1723e188f7a26c234574129af21fd47d2f075fa451d0ada83dbdd7e1b5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USBC19605370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6a28eb8e797c59bdd6427ce04d45c8d604f523185b61dd4afb05dc1d54bca4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USBC19605372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e499dd28393046288889c612e87275727b6b5fb6d47b5ebd2c5cfec469a7deb. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USBC19605373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98515ee62ee84d57cd806cb9699e4f2178904a33f8c58fdb85d61ba1ac589d5c. 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/USBC19605374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73aa8785f05ba94823be775e1cd711fc6f89f3d50ebbf83004624636066c254. 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/USBC19605375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259e416b91609c2cae84e853f5f94301acbeb67c2eb994f2cc3c5686b778176. 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/USBC19605377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feadf485327893d97d64a65eb31db2e8337a04938854dc9153b7c420f18fdf5. 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/USBC19605379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c43a9ea47e6f9749dcf946d56ef4e5f5e14e08e492738a1d7517a32e125d4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USBC19605380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b65e26cc1c0a7b4ff4bf80b3a80768adaffa90433bd6c4294ea8a17dd9c8528. 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/USBC19605381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a2b1dd1af63c7e85eab4717aeceb4fe68bd409533506945789e64a66b04b3. 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/USBC19605382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb504dcfe846c0e8ac163e48389943b9ee1385307a49ffb9db7e04f4564e32f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USBC19605384.