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 0x3511dcc3449cf94eb0b0b13f059588594d2680cdbfed83a09262575cee05ca95. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a41fab9d-2a96-45af-8a3a-74f3de4d3714.json and https://artists.proofprofile.net/proofs/artist/a41fab9d-2a96-45af-8a3a-74f3de4d3714.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 0xad35c824bc1dd150322e3d967ec20bef71ef5a8e8c35c4b0ec94977af8480889. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:37Z), 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/GBMA22433045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9af98c65153798289e0f5a590ff7c7bed816251aa7a0195d3a9e647abaf1440. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:24Z), 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/MX2832328206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7b5e5f9bc0e6928b13e20ede2d62eaa032944bb01f81d49bbdb17c7c3c716. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:28:54Z), 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/GBMA22447049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad697b0b1dbb352f3fd1248be94a3eacdd863ddbbd7e0d4e796437a7068c8a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DGA0M2356900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5a16c61ee45548c298b7273d317ba1208fca70acd3d1b45ea0f382ae54cfa1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBMA22471684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b08f3ea6376bdcc450c7f1d42ea6a5a5313fd919463c73b5903676f00252b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBMA22384819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1bfd12b6b78aa1acffaaa64ad3135cbc98b6137350ff833222142b10906724. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBMA22396015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a0eb877baee7d43013d48dc91723b36e1954ec967850afb9069755a79b7d2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:55Z), 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/GBMA22398959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb121ba1320968bc3913ca17b0d54ee24bfd118f23275e9837adb85787ac764. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:29Z), 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/UKXN22548990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7760ac0c1669174f0cdb283947aaa4a928d066a1761cb195a3d28ff5f0d3f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:26Z), 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/GX3Q92507151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec747beae5105b152d66010672bb3ee009f7eaa8786ded2284cf46dff6c09fc4. 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/GX3Q92507022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab96aa91888393b738a59a25779d12bfe67df504df2900bd872d0932799bf5b. 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/GX3Q92514660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c109ab68c8d0c183888a5b2dd022d2050d54be8f7e121ad372a443a4d55e586. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92514795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca40816a98a64622982423a7c96ea8fa3c7870ab0d5ffabf9fb23b70e296c0c. 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/GX3Q92526510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa570cbc3b6a46a90111ef903994b5c1dffedc61c71e0ffe676d6de48963d44dd. 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/GX3Q92547758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8146e55aa90342fd7b8d68469f916237ac4b55a2437eb218c14a42ee68e63. 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/GX3Q92547763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b2ed8ef42f52587239f7e67d0dad7e40e8d4f16c8bdaa7fdac78c7b92df6e. 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/GX3Q92547762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7d2fa36e8470b70417158c371e8a73bceb91b6384839657ec0c3661d03cf6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3Q92547757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7756b7e11db395cafe92e74cff20b260fac3e285878c30c0bedee659aa0f10d. 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/GX3Q92547760.