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 0x717118932be1a3abd59baaf55b3b5c878309402f9bf93b9fb6fde39dde3fa229. 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/0509381c-d85f-470b-a0d5-8968979333c2.json and https://artists.proofprofile.net/proofs/artist/0509381c-d85f-470b-a0d5-8968979333c2.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 0x0a43d6964f18027542322cc941c67cbd980236c3c53d6e5f2f16f46b7f8cb512. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAEO1996652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171f8f4052648e49bddfb1842136357d4660a6a49226472becfd088d8e711051. 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/TCAFP2118874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38d116cfd2277c38af5707eaad7edb2d272f69b888b69a7ad12f785fcba927. 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/TCAFP2118880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabdb71b867a0c7dcf3652bf0b83815412a33c4d55faa538360b85165d029104. 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/TCAFP2118645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b48619c7c7e12b0e254596f5dea98bccdf7361f4a7452001af02c3f59cb840. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFP2118829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539c48fa1d81587833681b2ef590262131d86154feb36dce363a15e3968f2746. 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/TCAFP2118834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6979950f04550366abdb1d0dddba5482f8c6c6e15b2e2ee5eab73ec0df839e6a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USTCE1063619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe98b0d5fd45ffc962ec061275c5c44e6804c80a1447337c6965786606637206. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:08Z), 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/USTCE1063622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6b3ed7d3ed1851beea79fbc7208e80436746fa12adc7219c37567d7e62e7d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:56Z), 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/USTCE1063625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c02aa1a1e10bf64211411247d1d4d79006cce06d0295c7e0e490cbfbb7d9a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCABX1439098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e461941069e87781dc83f6a7bce988fba6b282a4da58854dcb787330d81a7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCACQ1623439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65014535d7c347dc0860579bc962bd033745f98ca48b4955d753133568d3e3c6. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:51:46Z), 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/TCACQ1623444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071b27ed22604e6a87c2b775229cc0e2ea9f9100d435be59a0c1f95bb7219b98. 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/TCACQ1623445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473a7f55a7dacbe6d29cb24fac44c5f449df4740b91650805787bac15d82b73. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAHL2310148.