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 0x09ec825b3935fe19696654c7f904c0d27008be5096c2dcd861625c6cd50e6713. 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/16a0b974-e4f0-4c1e-adfd-f1e4675d1aa5.json and https://artists.proofprofile.net/proofs/artist/16a0b974-e4f0-4c1e-adfd-f1e4675d1aa5.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 0xbfd121bc868946c1a857557f925b840112a506fb676be80d20229ef7aa13b13f. 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/USL4R2030584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a78fce99062251324283e4bab1c5ad3b72267fd9f846e0f5d6c823f4bfd67d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ2168167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310fc7c62da65d34a36732c6084366d07f44d1ee52a800467e001ddbc4fe29ba. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:13Z), 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/USL4Q2159406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a817d7bbaac196f1b197060179d51768f222604ba6ade5053a01360fd2d74. 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/QZHZ52250014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546d36c6f0faeef72468c40d0e64889a058d6e0eba49a9ccd2153c8808945a3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BKASY2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea3ae7572e1688730aa53329e5c08470a8354d279b307aa12b9aad2af3623e6. 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/BKASY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37a837ef24ca8e1388d075198d8757fd989334e46ebd05a86f3bf351e12580f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BKASY2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fb1d16dc9e157431d31212beefd15c9babdba43640dff57af9cd94792675ab. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/BXRK32400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbea2e2e6213c03d67a5bffb041c88a9b832193c8ad83f56f126ddb7b215caa. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BXRK32400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c562d43120790a5239f4c3d2d937e060d7b8d10ff02756772981b60ef7842. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXBO52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c562d43120790a5239f4c3d2d937e060d7b8d10ff02756772981b60ef7842. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXBO52400001.