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 0x093a2835d2fe8fbb931b783dc71e937a63725383462e4b5b22733c07f6716a04. 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/aa48f6ed-99ec-4e8b-a029-0fbc131b70c9.json and https://artists.proofprofile.net/proofs/artist/aa48f6ed-99ec-4e8b-a029-0fbc131b70c9.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 0x3ae0b314bfbb5993b7131f5f1d6cd569dc9a0709b2e9688ed0e1b4f424741fc3. 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/QZ93L2060296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b9c47fa43edd499278d48db9a28b98957305cf2313caf8fc3b94900f3a6c18. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ93L2103827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13675d4ea795e8d872137d765106a0d6343026c29c450adf64d45ba5a69181ff. 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/GBKPL2166928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56995435110c951785a5f88005debadd36947c588698df712b63aac1c582932a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GBKPL2159953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde912caed65cd7cc4bad0b43d87a2829d64c57b6dcdfd824a4afc5401d3ae420. 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/QM24S2204518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3605c8bf0899fdb7b16634707f2b8031bb03dc6ad936243b12f5bdb2e0cd577c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM24S2404259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862574367dd1b703d8b03f27b12f361dab593bc22fb2b959c22fd3fa67694ff2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM24S2405863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7add23e79e176719f910595e9abed24dc5923f42006382fa089ec21683729. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QM24S2406215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3507f04fcea3a40bf1204e5985ee1eb6d069efb13eacf39d729b222746bf02. 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/QM24S2306511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2196eddda8b3c087718e6cd573a5154e2a297a7d605f6172e62e93d406b6b60f. 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/QM24S2404799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4fd2e6519c76125074e9a8cea52430da134c00be6209af427f79a76e70ac49. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM24S2400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc994b7ee81edb6f22c0194dc262fbe95766b92e373ff3ce2de311ddc429c6. 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/QM24S2406213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa73f0fc8463a3baed895d9141e73cbedb73dbd77c4717f25f4e0ea375fc0e59. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM24S2406212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886ebfc96eaa6209900e39dcfd1b46194ebbed630e8dd5c1bdcde212870abade. 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/QM24S2406206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b47453e6b1cceecfc082535ac36a95c52c4cb0d33bb17d911cdc4dab0b98c06. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM24S2502267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76bad2939cc2ac4acc42dad91a90a5462fd61b622f7a05fe7caadeb13b0f11. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM24S2506027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb4b7a368b25dc68a91ed4eb4c79db4206d87f5e54e4404ccf53f27bc8df51. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CA5KR2004705.