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 0xe8280073fa7fa10937c8c733c07d8a424d7683d86fc7be7ccb0fe60aac50f968. 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/fdb0740d-444e-4620-b783-c4d9bd35ea5a.json and https://artists.proofprofile.net/proofs/artist/fdb0740d-444e-4620-b783-c4d9bd35ea5a.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 0xeabdb6d3e3cdf1729fe7d07f444bb9b890b8cbdd3cd3813618c01609ac7afc18. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:26Z), 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/DEAR42564828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a2d87cf049f3146d45a63a33fb2e41cedd955c39d38e1e9ea143319c67a92e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:59:24Z), 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/DEAR42564826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9563ff76b15b4f0502ba3f0abe80ea47b7c7881e28d7b95ee9eaa47818956e59. 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/DEAR42564889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63849473482d988a97df3aa677fdf853802d24c2d551c4cae9a3d0ec52f89ae. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEAR42564737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d570900cbbc2c71141083a68dbc9863b64e79217889b358a94abf37ef39aac. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/DEAR42564735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504071bc070f7dde46aba65aefe773de691a3753516b43416fda132e19add44c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEAR42564793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9407f0953a91c87800b1b3d5aa8768b56f4ac06b69986eaa9de2f11f1a064df5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEAR42565158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1a918a49ca277a10ae0ddabf558afa8a961cb9231e9a34acc901171a007781. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:35Z), 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/DEAR42565296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436f7bed085e36b7eab74b5fb38b8abf03462fbf80938aec4b7de9c5e8231b4. 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/DEAR42564867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf775f3c422b79313378c606223fae050b7975786ae901648ad6b9954f30950f. 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/DEAR42564976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1514228bc8de4df6dbffe926168dd12759d161b1a0f43e03ef017efc5ca66479. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:33Z), 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/DEAR42564811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447841b5896f50c5d5451344039e67b3ce43891fc29ec853d61a542aa68b522. 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/DEAR42564876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9cc7efe04661d2e71454f65a9fa95a9fc1eaacbd57d3a652c7c1d35a2b5d30. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEAR42564919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff435fada58ac328e2f08fa5a5fc04686820233f872863e2f62805b5b444c7. 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/DEAR42565645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d74379840c6b302c063a9708da19d4351c6c28f9f38c1b4edd76cf0092c48d3. 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/DEAR42564698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e60f10212327a0d80d546a5441a0869220dba2cc3a23da0a948b7c335e03198. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:15Z), 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/DEAR42564780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb1419a2224c0ac46a34d4b18eaf1c7d0f21ffd78f47920fcbf1b06fb24f6b1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:47Z), 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/DEAR42564767.