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 0x5c28e88275a9e8bc4b67a94698e1f55028fe6a3966af08af4eeba5ffaa988f79. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72dd4aca-b362-48cf-8f7e-cc889b0c7ae4.json and https://artists.proofprofile.net/proofs/artist/72dd4aca-b362-48cf-8f7e-cc889b0c7ae4.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 0x5b521867d2a58c614131c7949971c22ed8550c3cc10a7c15abfaa6c912816bce. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USHM20665806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa849fba74fa1beeade47f232749f757c27be40fdcc99095b3f773fb200bc85bb. 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/USHM20665807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2cdd3ec67470a86cfa91549c1f5bb5bac20f6d038971420d8bb67738bbf4e. 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/USHM20665808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da5d0e6e4961e609b1a8148012d39f5dd7de63de3a97e4f9b0e59f4c62e54f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM20665809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079708b29cef8939d22f2205165d831f9dbc9e8afcbbeb99e3809f6b0c1394af. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM20665811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b34667dc3dfbb0ba12205c1368fc37a7b57d2e478001f53ef41a6a49fd0d4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM20665812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d2022751459a73aa8e13552bac821d9484453c6b16ca5891cb3ff30134154. 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/USHM20665814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc63fd37b3aab8d5ff6e9ed5431b22f5de03c2d159647dee87f494f0f83afba4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:11:07Z), 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/USHM20665815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410090cf65f4eacd92cc706be2655ddd95b30e0c2f068f13c72e10fdef1b72e8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US5NM0900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79fd056ba1f4bf7d1aad2d046272863e6d6a03b83ba2c32db3e07e3dbb7d26. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US5NM0900206.