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 0xd58375b5cd6503fcfdb1fbcf9e66cd9b6ec8dcb942d0f94fe24b821fc6f7b9b2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9f29600-f8a7-47e8-9a5a-0e96398aea01.json and https://artists.proofprofile.net/proofs/artist/e9f29600-f8a7-47e8-9a5a-0e96398aea01.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 0x395830776325bc4889c343a564547cfbf7a50dfc4ac564e790a7d4d363451ab2. 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/GBWUL2575085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb24c3e9a5c9bf4d06d0afd968c3fd65fba5935ddc159d4fe680697b9e08b3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBWUL2575086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651f73c787f0ac044d0427301ec419a063564e4e5deb95e8c3e57556ff975d9c. 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/GBWUL2575089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995f6d877f14261d496db55e1923a7c9ee45d6249e5f7f1efbd410c36d89d52. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBWUL2582670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84d20abe90f07ab44c81934e7efed0cd83c8c9e992e839e0acf8b5e5dd7c50. 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/GBWUL2582671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3186f377fc01ff8f960f5b09428d20324363bfb53c27094fd02272f30e6d0eae. 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/GBWUL2582680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb5a90d58161bb4cb31ab97046fc4812b147670fb3a9ad5249ffc35a298cd21. 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/GBWUL2582682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d54a1bdcc790b2965e16620ea1305c76bcc9e2e41e8f47ee79bbe2054894b8. 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/GBWUL2582686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82bb426d7091d692caeee7241b47fb1c8ca24acf51cd8998ebdbb2b9e58ec6c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:04Z), 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/QZWV32596915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ae4dee8789a536d03b75ca57c6ca62a756511324da4fc51682e3fbb3c31a8. 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/QZWV32596916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e6564704427866afa7469acde559616fcbc79fa1ec567e31c302b4f1ca0d6a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWV32596918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714322a61a455d3d002af0960a7a869b1539ea502155943400a0c429fe172b20. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:18Z), 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/QZZ8A2503613.