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 0xf71558cdb4d40e45e611b5754c4959da2f0ed451907112901a48205ff1d03ee1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9ab609a-8651-47ed-921c-28575d52e954.json and https://artists.proofprofile.net/proofs/artist/c9ab609a-8651-47ed-921c-28575d52e954.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 0xfd67459076fef24c00eca7a44ec2e95027bf9f7107c9125613eaebbf47f58f20. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEYOK1414339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652e7c83c183edb51634be9918d88a7138f610582a8153173e80e9d3c7d262c9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SEYOK1414340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5627a28f85c7282bf0b97656f7a97130c7dfcb39d2db0f8b52b9cb96fbceefba. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEYOK1414342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfee2eb4799565f6005693516de259e89d5e70dc4b52347977f3ebd7bc7e072. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEYOK1414343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378368d2ee2ca4d291ae3d0331e68974f64fc7eac66df05fa35c92894a45bac8. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SEYOK1414345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3725009d9453ef03ba141f6a8433f8aef3111e5c53ccf5a1049950e4de860260. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/SEYOK1414346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21bb51cc18734c2c0fa05c4f9445906f0b24f7bc2d4ab48463b299416c2c95f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEYOK1413527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe968ad6afb9246fcd6757112e3bffbf59a6c0a26ea100ec42c924464a1b1f740. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEYOK1413528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebdb15d3748cb129861128fc0a52ed6663247a93849ac88f05b5d71cb85ebca. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SEYOK1413531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6c024bc8a0d11610a4b0827f3a27b909e1e09bfa99b47eb6c2c3f4e8477d12. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEYOK1413533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620446a49c82ca71d44a316cb6c73ce3b7fa84259825bd22eebad374762bb6e2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SEYOK1413534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c410a0d5a1927b4759ec0a7b52b20090a692c090af0d2ade6cb20fe57db34a. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SEYOK2215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d8333272148d93d802bc3d5807ff4b9c772634b92035c74c0a4188c81a8ae2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SEYOK2215202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de1936fee8f4ad7ab6543dcb7c775c43ca6a1213c868197b1feb50b072e0077. 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/SEYOK2315179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c3cff05afac459fadc7ab8c05b22aa4978133fa7efdcbaa049f3d506ce7b4b. 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/SEYOK2315180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bbf2d78fffcc3107dd8a255bbc7d9a749cdb805d65b8ad39bb4fd891f5f7e1. 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/SEYOK2418995.