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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 0x865473fcace14ff44fc5d020ad9b30f8aeaf12bf040e62b471bfdd1ca9d648fb. 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/12ebff8b-ff10-4927-81e1-ef036e98683b.json and https://artists.proofprofile.net/proofs/artist/12ebff8b-ff10-4927-81e1-ef036e98683b.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 0x986426d59aa181eae97e0e6c63a5f5b61d64376b7a748b6947656f02a0ad1618. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLB602300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58830f95a7e95b8fa12861b31161dc28833c554a76b4e4e046423d93096c413b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:23Z), 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/NLB602200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32504b62491627556016ebf1519e39f60cd786df4e0dcb4b83f912a0fa5b0ca3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLB602300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c2850cff7963a26359eb4583afdbcab279aa8be064a1959c505c83b1ebd1b. 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/NLB602300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b51936c8d6271e0fe8fcec563c0c3682e5609f61458b957d5b18cebc0f31c1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLB602200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4a3664811a6ddc18ff41d2fec2da39486388e950755ff5fb88a5b48fa9283f. 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/NLB602300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb473214ec8d86df19f5575991d4b62950f0339fc54a7b8818f2bb36a945db8dc. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLB602300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd228c6443af1d20bcb75d32dcb187629f15f26e84d2b7eba29c236e1ab8ef91c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLB602300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2805015e68f0868dc6de3f398704ff35c44e3d405997f292ab3f49daa71287b4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLB602400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced3c7a70e48d2aaca713007a627f8a7e4b615e18a5b9205e4438781a9cf0265. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NLB602400015.