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 0x239434f2d61c59993f7a35c5042317ebc72609b2f09c12343d55b10217bc2f60. 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/85da7587-1efd-4631-97f5-54e517a623f4.json and https://artists.proofprofile.net/proofs/artist/85da7587-1efd-4631-97f5-54e517a623f4.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 0xd4d9e78bb23be9a88c2d6641c56133827c872d0304b3f31fa52aad3b5f3fb6bb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7T2440767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971f25c3108b131b05575c631b2765f81df729ee963ae2420eaa59587f05a7e4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7K2482780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c3bbf76419a0852138ce93b048ccddcf71cbafc0ae7480c41f67233d09549a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ772487547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59820458d3399b8a31aff574fde5db3788783ea32111ae13a7ec4672449934d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZZ7K2482782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74433a997b15dc7b6d15ba093b991bfb48620422c91ca51cf5ebd1ab1ecb730. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ7R2440882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a85e6d08a930ce36ca83b375a6df56b9767ea1b6d2361c7c91403cc5afe7c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:59:25Z), 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/QZDA62565776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a85e6d08a930ce36ca83b375a6df56b9767ea1b6d2361c7c91403cc5afe7c. 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/QZDA62565776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc195137b61d786616220eb68115c2ec79d493f6255afad5fe88996a8a6918310. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN32508031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab91198f229c1e2754705a3cc4e6a4c03bc7361e37a43faa241070ecbd9d36. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN32508038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c8c6ffff734fcfde4f6ada7cb3ac0511fc7a9acaad2f104957b76ed0d24fe. 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/QZNWU2507710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec8cef34b65b67b5cd39ebad14ab4e4588ea5ff53d5ef24269bcd1963e8b913. 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/QZZ7X2538523.