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 0xb00a51ef24ab42e6a7d3f6ad78b3a0ec2d763b97aa87077a7d5a6d5d48aaf92a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ad2ba1a-6d76-4526-8e2e-e44fe940ee1d.json and https://artists.proofprofile.net/proofs/artist/9ad2ba1a-6d76-4526-8e2e-e44fe940ee1d.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 0x14fa49555c65da34a387a406607ae903a9dc40c33851bfe6c7db6e7f73ac4ea4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZHN72018891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3c573674530e051901f63a2c43a50b842cd419d4a153cd3aea10719f12a815. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZMEP2009635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a830d27089e1615642d1bc5eedde152154411d3ec9cf076f767f509911dc91. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/IT0312100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3a2e50c999ba98fe2fc3bbbf57a78eabb12587bed949409f6db958edd5acd2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZFZ32206719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe521b1a4e006c2be8fcbdedc0225d0f5a51264afea5e2e6cbadf5467d0391a60. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWT2246173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30ffa9d635e48bbc4b909af4165c1c441a6c1ab5584c5e015a0e78c0abdcab3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:34:23Z), 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/US3DF2260779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d76ac89679e70641116e1f80c6ce656182a656b98285d09e6c31a0cfee67ba. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SE6I32307747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7585d066c87144c35813eda4d11eb5ddafc0b50ca62bacde6cb11455e0795287. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:39Z), 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/QZNWQ2397455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aad29f3f8027000886a06ca9b9a335581cc19a64a6c66c67f2f2174d277123. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2278312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9537dc7edf236c59cfb021f5c67d9828c710e75287705b2c0053cc28d64afc8. 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/DEH742321873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e148bad4dd448f9a9fd291c9f94a445997a044f27f10b098230e82eb187eba3. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTBA2351780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5098fd5c43c8c728926db9ed374e753f0badca198dd008100259d0afcbec2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US3DF2402233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3559a382b0b038f7116861cae44fbb8517fcf02980e42f350bc2c60c36f1d29. 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/US3DF2402438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70344c6feab2fe9dc45fb4807dd2d3c909e282074b885e92ee21984551ef082a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:50Z), 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/US3DF2442362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018faf288d4a6714bc29aff65f7e7054dd157d94cb9737b0d89e5bdad2ce9538. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2442357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66884dc83718edea0b39397714c56d62535184a83d953ac4bc85d0b8e9bf5394. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2466961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef5cd03e441756e5c45fe151cb908f2d9e7267d03fd742e1eee3fe243ba77c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3DF2476885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7753b4bbde259bf146dd5fba886f41097fbf227ee8b62a0317abd35577d70934. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2479818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3e951d5f36ccb26e544314af349c63c867479f20f12ad4cd3e798005ea249. 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/USANG2408138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf513d90dd9247da4cfffa95de8887bafa07e30713b518496ee7a5ee740fcb0ca. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:21:55Z), 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/QM3DF2405022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aad29f3f8027000886a06ca9b9a335581cc19a64a6c66c67f2f2174d277123. 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/QM3DF2278312.