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 0xe0419188563dcd245841b264f335897c508b4eaf21f5a012bfa483786918a5c6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5b45c33-428c-4253-a248-0480a91dc248.json and https://artists.proofprofile.net/proofs/artist/f5b45c33-428c-4253-a248-0480a91dc248.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 0xf14b97d07f5069d6b87908e4e75abd3306e6c009bf9fc16af7cd274d23462081. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:06:51Z), 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/USC4R1605783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecadb7721bfcf234554bc82b7020de905197009a47a4cff7a04c969f20ddc9b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USC4R1605784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9c951f83a36b73718348c5ad454c7e35524d5a1fb1c3d6c56aae75688cecc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:02:51Z), 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/USC4R1605785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b038c95c89a7f90aff2dee70e2a04fad73c68ea69b0cfa8cf580e251ec79f12. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USC4R1605786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aff78bbdfd622b604d14a0b72cfc42729b130e0e876c55b5bf2f92597dd9e1. 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/USC4R1706146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4d945c2f7b7cd112707cd23f431141d74c263253b69aa96154b6addf4b04d6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USC4R1906836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0edf7971aaad08f1754524b5db17415bb2ab650703291b2201073df61d61451. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:22Z), 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/USC4R1906837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25356677ba0b3463a367c25f9fffcbd8f40bb2cd3ec4ff9dea8bdde318c501e1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:17Z), 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/USC4R1906838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4c89458391fc0f7b223b8680ebc7ef7c08b3891a1e8f88c72b6c74512e2d6e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:14:39Z), 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/USC4R1906839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9551d0dfbc57ed7b51b0ef55277af0b4fb6d41dbb91fd6f162a15881393b0ba2. 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/USC4R1906840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a96e9b8dee45ee4a74e8d05328c16a8d0bc0a15e3dc0617db6ced89e2aeeb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMRSZ2100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626250647e757a39fc9308dd5a04006a45449237c6ce4a34cf96a4c61c897fde. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QMRSZ2100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8c38e13ca63f069c1e4bfdf27d81f12042c09f45fa65fae0c47cc3bbdff70. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QMRSZ2100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09e93b53935a46ac3c1ec43d8d1dff8855153fc78a3033b3db234c456dd694. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:53:29Z), 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/QMRSZ2100576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba37d80576f8c6e0079bf96d04b38a449bf40da29b2e164df5f05b13baf6eb. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:44:31Z), 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/QMRSZ2100579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac60452e7005e31cf7026ed92bd7a1b78c831b464809300fead934dc416667. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMRSZ2100580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be0f34e5bfd36590647e933dddaf1dd9f3507aa484849e2d451f7ec91adc37a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USC4R1605778.