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 0x97aab2fb7cd7a3a9b68fc1507c450741cda41030676622917de3e302d3401883. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f840abf-249d-4a8d-93cf-1ddd26d66e56.json and https://artists.proofprofile.net/proofs/artist/7f840abf-249d-4a8d-93cf-1ddd26d66e56.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 0x20e41aeed15af7fe3f763b58f84c512ba3822197855cb5661466254264383612. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAHQJ2558196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25537d7e883efc40241f9a74e4741c985d469af7d31fbbf1993aba6b5a69dbf6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CACWV2549775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e72c18f225c15060b285f015021818cc0f8e23d526a259d675bd3c60827c72d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CACWV2555570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92e9d2a1d43d4260db3afdb8d7b3dbadd82d9bfcd4d6ed0b6897e0c4867b9d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CACWV2562963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df51d1cd2e3b62b9dd4b23677287534b4937ea9fbb846e33255afa182d000d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2576232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2790b9adab19b1ee0f1a14985d95f3326e978615e6d2fdf4560c0cefaa28ffe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CAENV2558756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53495a093be65505e02ab0d9ae5da145f89157b06d0099287eeaf9beca487b4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CALVP2505685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610fdf56b9b62bfcead3777078acb1f4658f17776b97cd8c8d75a92c8e425ae8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CALVP2525079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72ea41596e66996b6eff502f859320f8146bd768612e3e584748e92867593b5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CALVP2532837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e9227262406e218f14dd5c12b9948fe1873cbc5d5b0bd069e1fedf6f05cbdd. 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/CALVP2545333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640dd72b90ea3591bfdfaf0fd54b92d06bf0484f4cd6df4d0df39752569e05a7. 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/CALVP2545590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9589aea2e014c8be4fbed072ab27014f324d9a2f4026fc8ee0d7a72cb6a1951. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CALVP2588935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e5b772ad8ae6dddd1ee74f6fe86472cec4e0f1a16e57b9cd3e354305d1540. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:36Z), 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/CBEYJ2500772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5864a99b660ab01889a81f9affb6e27ac70be21298355ba21697bfd0b7add03. 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/CBEYJ2536234.