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 0xbf952d90833236152446636f394f34d74bb0754ac2f885b97e04e18c3a2a8062. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72d7f3b8-dfc6-4edf-964e-c48c34f19139.json and https://artists.proofprofile.net/proofs/artist/72d7f3b8-dfc6-4edf-964e-c48c34f19139.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 0xe22d2a02638bddf69875960a8b155cf94b07a20da5b4de5f6ee4db10edb3f125. 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/DEAF42000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd066ba4049fea757fd569a0976057091b5497a0e92a76cd23980dec78024f5e. 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/DEAF42000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c36b76cfcf2d709d931fd153ee0a872ba59c1b0d4d34c77f537bd0774f13c4. 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/DEAF42000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2cc87b0e6a84f183df87f4ecea4c1897eb9258ffe821bf5cd96c628d8831f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEAF42300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd21eaf47257d433d188402d5b645865a60588a6edfd3c242016922ae0c8783. 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/DEAF42300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9653a054179188cb517ff6a555ffde2925f6d28017ec770f5a16b37cb98e4eb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEAF42300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1596503600e1f06496cb64c37a5121ac7850c967879a47e040cbf0a444e007bd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:25Z), 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/DEAF42300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd21eaf47257d433d188402d5b645865a60588a6edfd3c242016922ae0c8783. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEAF42300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2811e5aac9f501282e5df81ebaa18566e94a488f9bc085fada466c63d24fac4. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:46Z), 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/DEAF42300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2cc87b0e6a84f183df87f4ecea4c1897eb9258ffe821bf5cd96c628d8831f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEAF42300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde15c57bc8b00619e229f81f1cd2f5b3039584a1e8113673f9550ce21fa4201a. 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/DEAF42300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0a465ae10c446fb1897ec8c7f09a5b0b12e1b3fb0a30748e88511797786c21. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:00:15Z), 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/DEAF42300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0907058c1617dfe14c53bdfcff229fbd255b9f23ecc4fddca0e8f09f65f7c4e0. 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/DEAF42300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536a413fc2ab36737889a45d070ebffe711c92235325bef647b930b214d2154a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEAF42300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd68c413cd276a103c196c832513615722a9afb27a037253eaf2cc2ffc2593. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEAF41900038.