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 0x6204d175ff93e76349d6be07c8bf7244f1ee841913076d1e5fe6abcc8ae6975c. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d804d7c-3299-4b04-b59b-750bb818b3e9.json and https://artists.proofprofile.net/proofs/artist/0d804d7c-3299-4b04-b59b-750bb818b3e9.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 0xac48a80e83896b124afacece98673caa2bd8b6c89dee93a263f79b4f14872c89. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:53:50Z), 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/QZJG52392654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce35456dc0b05a191236900dfc9a3fcdf1bceed30f7ad7a744e6f20001f24d2. 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/QZJG52395655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f9906372d87a1007bf592446d6e307af24a6bc072bbb2cfb7ccb8caccebcae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMX2352989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c19f6d7b7f1ebaf8836325631041a6029c7e65c7c98869898253a522d0ca37. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNMZ2392503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd988f12a4071847713e93f647071bb0bf39aef75dd87a4691d751f68c05642. 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/QZHN72470510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62d872419ea79062b6772fdfb512aaeb5f4452b8bcba5774d93c69462d9b79. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMT2422686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc149dd952c6ad906ea7efa7bb5c82ecb60a87134df5b345ccd095590a690b2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNMT2422688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d891305de66f9a930a897a362ba0e5a6e139ef3303a6c77aad2c7e56da5293b. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZNMW2475680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811b57638d6ea342717ffe1d7598419f59fcf4e50493eb59dcdfe2e9edfa852. 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/QZNMW2475687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65c1e7d7da76318c2f7258a57c57db44ba0a41590d38b5e5d42ada5b7808cff. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USLD91774419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5826e331ceadccd40991a633b385d4aa57e15345c80245c02cec27b87a2fbef9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLD91774786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767f5a5991fb7f3cc3692b34075285a15a10a856173a0a1740526cb4e71558c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91775666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f60844566c900ccde84fcf2983d38e6a1a33e810b580b09b515d917664c079. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USLD91775667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93428601b18b540677eefd58eb3766058a2c9d2e51a41159ae1c4dcef978121b. 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/USLD91775668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179c3cb31b63c931d5bb7f7d90766d74e48daff7ee154207eec82acc3ed9070. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91775669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9f628f3b3967a54a55fcdd1f711bf82c7841faf3f2cf00b538872440b74c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91775671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b82c0b065a5b73cf5cfa14d358457389fc3a48e02b4cf91b0fa451f6c441b0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLD91775672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c01eac92a3e77aa0325a07293d47cf7bbc878b7903b21b59a55d5b47dc654. 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/USLD91780520.