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 0x0f519d7c0d4d2628a3510b594aad979e68ed4a08952f92b889b664b76bb28c05. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc94c4dd-79dc-4242-92f3-02ab9fe61a1f.json and https://artists.proofprofile.net/proofs/artist/dc94c4dd-79dc-4242-92f3-02ab9fe61a1f.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 0x5fb7e97d61b27269deb5e1e3b5a564c4b0ca81b915428afb4ec7ab94a100a7a8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/INS7R2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61114295aa0779ddbcfc01557756def7aa55de1a84ef3e41b770b5f759ed0d88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INM8B2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7f0a5d3105c02e15884bd7866ecdc9ab4feaf234b852d30eae1c0c5e79456. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/INM7Q2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ff323b2aaf705f9480b3dd00159fa5b32710f5c9fc1966a13bf51c1f1dcea. 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/INM7Q2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5487566ca6fa5b1f228d7d6e4f4c686f16178f3ec293bad75cefe0dc5f651. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INA4G2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b95e9972efd97ecbcaf13d06104cb66ea8253d43961cd0e08511d30bbf4425b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DGA072344008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2637bf6789b1ff41386fa4829a556fab8c14870f43943b94116c3a5da33412. 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/DGA0M2363048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4021f0f44fa1a5463417c49541984d235bf9b4f161042aad9362e2e745749ed6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:10:14Z), 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/INM8B2100797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f8eb507cee095c8d74e412b8b982d501b6dc6c78484b44c7444d8ee6469a7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:59Z), 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/FR2X42491695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af58690fed03ae7a04bcd82d28dd771a7a6c235ee98e078608e4390283f1f79. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R2497693.