Sero may refer to: Places Sero, Ethiopia, a village in Tigray Region, Ethiopia Sero, Iran, a city in West Azerbaijan Province, Iran Sero, Mali, a town in Sero Diamanou, Mali Sero Blanco, a town on th
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784b52233d4badf3725d61e410cfc6e0c5a6c104edada1ffa5f91c1b0c1f696. 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/ab1b0add-56e0-4b4b-99eb-43685a964668.json and https://artists.proofprofile.net/proofs/artist/ab1b0add-56e0-4b4b-99eb-43685a964668.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13583b87727fe0a42f7e00bbe2877de2db12d53ffaa8f1e60ee10b645a3e79b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/IL6652103433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0073c42810acb39f20a5392df4fa9f5820d1e28d225b66be013ee87d62bbcf. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/IL6652203919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb7be1c8e42262fdf9638007c1b7b30221fe3f3ca7abd5cf33c81a61dacb84. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/IL6652203990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604ea2b607986acecb76b38a35ddba98477f2688fe99a1d3b45b5d567f8d9d8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL6652204380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ebd20951e9e7d24113caabe74dc4a3c6ee53d203e143afb06c601e7cdc73a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/IL6652204381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3f16c048b009ed8fb35046e9cfddf0dbd9299a7831612c8aa5950c6eabfb9. 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/IL6652204455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a03d44df8d1efc4bb0b6b3dba826b9883c85ae083e0eb3476674934dae93899. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/IL6652204482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d2ac1adcd61995914404f336ab16f9420056cdbe6624409319faeb6643238. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/IL6652306151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a941588dc4bcac653b72f21cdf5d8d98a9805974fe4b2c1d6174ce3c4cc132c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/IL6652306149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe35bb867a996996076036327c6e26e535b4833df10debe6141bda95c5806ede. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/IL6652306307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027a48e467d5b9fd8ef677fe2100be6e6a7b8628b27168d46bdf2dcdddb72f4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IL6652306857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508b7b0d0481bb95eb6c6309ebc3887f4da58167219e328713abe17459a80e4. 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/IL6652307025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110c59ce4c4a6ea9fb98e06d3677052870909a6b6efee514db5487dc706f29f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/IL6652307035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17b989afabb88064574566ea1e4dee4085fadebfdf7a28f64a8ec569dd1a57. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/IL6652307131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340f3b7f55212e556cd6249e37108a495ce8752c25792754d45f2aafeed7ddc. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/IL6652409351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c41f83e9e3c3a2c4b5664de2e0a0061b5f6c7f07ac8ae18f26c00385401065. 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/IL6652409349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9225b962c567566a1f3b1e4100da56d81ae4f680144d57cca9642677cff8e04e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/IL6652410003.