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 0x5c863cce8f6d913f243dace081ec69cb4a1ea6bd7663ec6af5782952240c4eae. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1bf56cc-d5df-4d41-866b-8a8ea663814a.json and https://artists.proofprofile.net/proofs/artist/f1bf56cc-d5df-4d41-866b-8a8ea663814a.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 0x6e2eaae9889464aa1096aad78451d2b39c749ea4c189a663305a1bb674485f4a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:49Z), 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/FRX202008342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab01bdcfc9f1c232dd1cfd57e66a6e0d7b9d362053ef2c1acd37b32588b56c1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX762007292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97a5f4b5222ade70c5c8dc7eb4b0e81357c0bf4fe82f89e72d0364a3b043783. 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/QZS642123658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaff6422f331c8689f5399a13668c5d412324e4ea9b89db547fe3d84c7c3e13. 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/QZS632100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f40b8eaa50c6511382c6f1b74b602ed6df4c2ea65a03d9953e53539792c2c1. 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/QM42K2367784.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd97e758601551801f7ba95eb86226da7a534ee68ffe328735084f817ed4b083. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMHL2470974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d65b74d4407c035f7164843d68b71a4aaf5bb7966fff670ef236eb0622c4ed. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:38:18Z), 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/QZMHK2442982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1728bc8eaf5cfec3021690ddebf2d5464f1f8c20023b3becd8e51d547b2130d8. 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/QZMHM2452629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031788c53b33665a5b29242692d51ee267178d56c36926813c333ddc95faeafc. 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/QZAKB2437031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5873a9937e01a3b9f6721533f680b95afddb5b5b70e80c56d0c61ee7b742106c. 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/DEUD42550057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b541568928c0f8d5b4a333b2eee2768bd702e6d180e4b02df083c36cfd2f2ed. 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/DEUD42566671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96af8dde0c05e3c9fd48f7bbe542eb3578cea94e2f5c2adeaa7fe55b2a69df8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEUD42570531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44d2d240a08a588d68ba727b613c6865eacc2ca87200a8b00a09fca394bee7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:55Z), 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/DEUD42573523.