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 0x78f8da0a5b293cbf17e88b9e9095345e49a2eeed1811415c36370b983f003e12. 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/c5c82d9c-a1a0-468e-9eea-c2e783e7fbe3.json and https://artists.proofprofile.net/proofs/artist/c5c82d9c-a1a0-468e-9eea-c2e783e7fbe3.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 0xb1b76284d71cd245e4c4d87f9f7d58a24f322559d4d6a43a645eb7902550a307. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/IDA141705063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a6a388c15e07c7696d5380ea36353104611a88e9a79f70cd07827154438f3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IDA141705065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc8f1bbb10afb907726a2a9b59b472fec467d8b3e3b22681f1d723fb9e3b816. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/IDA141705066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90492eb0363f186d8f5a5a5b79ca4e15bf49d78515a9137aa9fcf1aea8ab914c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/IDA141705067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa6be35e54e646f30edb3d307cc28939b6d09603cca232c43cf8705b2926cc4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IDA141705072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3610bbe0304c725a006a64ac12120a365f1849aabde239f66abec66de8cc22. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGWW1926740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d4a26772c8688c8bd9238e4e910906ad0e70a7cabacbda463da22d48c4073. 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/QZGWW1926746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3521e30c101e797dd3585e36b516f34502ff27640577a7a71e30194d94e19e73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL2284378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521139a35883682c652ecd79f4eff355665553d2c1a56369b325575c21813dc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKPL2284381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195317a23d2b7c89bc422cd7f0031df57b5449d9cc4e5bf071aa9f939c74ba4b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKPL2284385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bbce3b46adcb3263c9cf77e0fcecf51f7c62eef63a7bb39989ca05c6cc6bdb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBKPL2284386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7652d4af43fe625f5ee9e0852c196136652278a177f9e5bf09bbf0ff924ff5ba. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FRX282495024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e17959e84642170433868fb4f21897868006bfa4447768e7ca75112a198a9. 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/FR96X2532164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed21c5e9f46911ac0b0095ed36e5823f6518c34afd36348d1df974f35f06148. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2532165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11636ba42000d60f8767c6850cc153d1b04db86863d4e8aa12d5af1f183c560. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2532166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990c740cd2aa8cf79a224c0714950acf6996d32b2ddc2ad2f7e7f8547513dd8a. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FR96X2532167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e875f2bb127e8c4479d6f49a4ffb934ca0acdd610689cbde373e62a1a17cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2532168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be12dbadadd161898fb710409ffdaafa2de2a71d5ac757a176329fb6b037b2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2532169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c002542bdba2539b90057e43e65f1d65a4e411aeb2338f845e9eebcce6057. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR96X2532170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09011cec17dfeb3ad8d26da44c06ce4c93f332d20a1eaf1bd64c3fc70b6c897c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2532171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd19f6f4e2d3be9de03879b1c792a1f2595db05fb817d206e2c862b127ed595a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/FR96X2532172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc329773e4de01fde54bc3b2905a2e3dd34dc73fd0c675fa26573c128f878b47. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR96X2532173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e771da1c3b52e2fc327db786517ecf200207601140ff848d3f48828ce1e79c. 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/FR96X2532174.