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 0x1b80d3ba13618210fc87e94255595296b25583d0715254cc3db2639fecaa6909. 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/bd79528f-33ff-45b4-88fa-8297e8ce4612.json and https://artists.proofprofile.net/proofs/artist/bd79528f-33ff-45b4-88fa-8297e8ce4612.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 0xddaba9d40c066a18f23c03202ac99365705cbe5d9f74b6feaac72941ffd6b19e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe057a7d24b499a2375a8c19d995c84c0d382d706880bd165d30bab77cd539053. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7a5328a9b1c4c1d4ffcbb6e64d0841ae03bd3558ea95feffb4f8a2fec8488d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS181800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c549992c21cd9df4328b536eaf05d1f47dadda7072cd0fa5c6cba848f3360b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf36b87a496a66bcf2f270a829b50f9ed577a0e805d1ef612af95c083c983d98. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f743f5cf557718d5cbda4ca6487e736d075a0445cb13ff110ef7e2d312ea8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c111fa38ede25ce36aa9990c0e92625dff1a7a15de37e9467bd046864fc0da5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INS181800295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f18310407f7c14067bcca9d039619d7db95536f5a329ab71d9814f56f971b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS181800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4798b61487a0fcd2b39629e1a3ba1d260e6dc8cfbec0741ec44e06cdd07774. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS181800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddac7e6eb21a9edfdf73880208173d7dd2daa9643653462cd385404960cc4d09. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAII2474899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56af06cdf66db523f6445acc0bf79b8c5acc1fd8cac3629c27658efb2be7e016. 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/TCAHH2332786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e651c63d9887b75909f03e5412211483fd7d81027aa4b60a1aee461f6c4d7b2. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TCAHH2332811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c7c46c04a40844aeaf5cfb0ab374d1e71e921447ed0712e56d61a41b1b30cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UK5PD2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb472162414f222e77c0a8e8654bb5d5dbc4eb321a581199fd6383ec014d60b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGN2210467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2279962fc7763c659a791b089452f5fbd3f2baf39df1bddbaff5ce5dfa7db05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAFU2136224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f1bcb53c4271924bc7a02cddbf993a71e11097b4eaf1413aa38cdc67d4849d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFR2109687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc2b3b712c5280ec4b31a671d9e64927bbb97305e3adb1452d05b532a433188. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INE181709180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ec2f6546f6e1d5cdd7fee4bb551c47c3dd9a25912207238405a3bb9f30d49d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CBEGD2400008.