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 0xfd3ca1c1af20e26774616d496e7c55dbb89847b55619497b6d08d44939a7ab59. 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/0bec3863-6565-4ebe-b63d-38a2b7b94bbc.json and https://artists.proofprofile.net/proofs/artist/0bec3863-6565-4ebe-b63d-38a2b7b94bbc.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 0x27acec2e7b1d85b842d783e081ba026544382746735e4e56e1ca66c86ce2c61f. 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/QZ8LD1726800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2260e5f05c3dc1dfb61fd5f7383a615e40087f834a7d4a1b4d25923e4a18084. 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/QM4DW1898280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880a6c2ce6c2e3136c50d2b6576e27f77dd97d268c3d8e78445edb322de9076. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZFZ72280364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897988c8fae4d630a31d6084842846e19e3c2171bae910ab842dddacbad468d7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ42318234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc03c357c832b26e36c715aca4d42fb9af72f6864a28eeb8d3f5805139a313. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2341855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb8b6fc82b750b39e79f7d5a83b2b986dd537ce2e79662cceb17e265697427. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWV2325104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4959217ea3456100a3cc1fa047a03d306e17e5683f3c853a62878d2a8ce7c91e. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CA5KR2464063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b9aa7d3b781f16861578de292f6fe6b76f2c719cfa0f0f6c22740463e1ae2. 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/QT3EZ2475896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd554dde90315adbd3110c74400e70ccbb50e12ca0f72c91b794f411377fbdd00. 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/QZDA72553913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e58a3e51c1f22aa17b66928eb84ea5e7d50a509ede882bfbee9a096a6e13993. 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/QZDA72553915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749044393ecfaccb0653785c592d07c77207c3260c1e735beee3e57eaab92757. 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/QZDA72553919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1e53a24a9530ec8c63fefdc7ed4054d37493c8820c532a52b45f626d9c9666. 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/QZDA72553921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d67343072503ef4983876dc31142bcb1740d0680be8e268e0bda5972e75d11a. 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/QZDA72553922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6939a8fd1015e39ec7aa0a37811e95f54e396f0b4c272a914cc1f41a4fc8a49. 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/PLX632200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae675ca27b8fbafc0dbf3dbbb344c2eccee5064fc796343fff7475095a2ae2a7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US3DF2089533.