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 0x1583ccbb26d099b10724907e246df40c566de7737323d0fcdd9f52aecc0f27fc. 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/8a1fdbde-827f-42fd-97e3-c25e5f95cb2d.json and https://artists.proofprofile.net/proofs/artist/8a1fdbde-827f-42fd-97e3-c25e5f95cb2d.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 0x61b24940ec5be8a95d30e048ed4710a0af2a038d180c0ef20bb23d92061e2d97. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:14Z), 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/USPR70204409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2731c5e475e4fa8a9da2e4533743f4617c9343bce4d1cd4d538080980118fdf4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USPR70204411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21aa77b242bee0cdee14cfba4a72e0a052c99608146ca2f917077890f08f27a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USPR70204413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1dc717f4a56731781e24a4d180c725d2626e4ba89dce044c71825fdabfc944. 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/USCGJ1634565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc02b1b67d52a479a1e8513b8910bdd3deac1d1e00971b1f31d36aff833568. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ1634567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d292e6fd4af05d4d0c48dd3ca8bf0a25b94e6573a9b5dd3f260f6bbed961b53. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:57Z), 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/USCGJ1634568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab5b5440fd5f7ed2da2f78059f529618e4ad3bf337b2968469953fe7b0d7b86. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ1765570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd91160a578de6162855373395e000c51f55c21c8874c9fc6a8ef923639b8d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:54Z), 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/USCGJ1765576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf6da1e904da0b1b9171986d1f8b3a9a804818ea2a6d75c8bf7fbd15294703. 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/USCGJ1772771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543114099e5b32f9c970c6c600851bc220e55bbaa8af863bb5db859b6af83538. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1772773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216730304c39e64ba9d3f827537493d787ec60f5414068c72858121b295d6cb6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1815744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0d6c3164c6b3ecd3e2f8f7a08fd5668144b618285ebc36e716f439e4e2beb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1815739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04ae807873d219fefa21359ff8dd1d6814565c2c05ec16a65ea17741fd75a6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:18:32Z), 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/QZTBD2466154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5865f33bc56584ab5977bc837be2489ff116803b7c718eeb8d47d66c31ff21. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:31Z), 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/QZTBD2472501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf35bb1d7a5c8e618d9cc5a5d6a846b2e6ad3875dbb338e1c65b56ea798bb55d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92480075.