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 0x54505d0b89462d5d1d8d50219dae49412a470306fadf433145e09a4125dcd07f. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8659b1e-bbac-447b-aca7-628e224f69a7.json and https://artists.proofprofile.net/proofs/artist/f8659b1e-bbac-447b-aca7-628e224f69a7.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 0xa7c6eaed8b65e13a4efaae1623b8cb4c0c0c234880d45005a45753489a42ff29. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX8LD2395749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dac7d0e6b5b0aa0699facf24c6d23f8b7b73b14c748f45c30f0989be6859be. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX8LD2376596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944e10b35e2b5adbd28a0df8d0e752529a1bc421449304420f6c0ceaf6d7095f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX8LD2318167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01046d6edbc5176625388d618d2de080701093d5cca736b5ae9e0cc4fa24df5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJY2472219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011ad564e11d862f71ba5c04d9ae6a10c1305ea37bd31c9f3f5b141aad14956. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2472220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb323f84303ed08567cddacef9c86d15033766682f06b37eb87b9011285dcb351. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJY2472221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7719523e7695db51c9511588a3306d75a20774949890f3c5b4ebfacc23db1fc5. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZNJY2472222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5fc641f00c01be7d684a259b36924aa5237016d6b54cc4b74a8662ca07543d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:54Z), 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/QZNJY2472224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774adc7ed2fa1e0dd9535ac7f622997d811b958920b9f49f5546e8166452018. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:11Z), 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/QZNJY2472225.