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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb074cfbf4dd84cdb1bd46d3c9bb05c4baef8d0b610c299d66e99856e0920dcb1. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a187c45-f7cf-428a-9a58-dd652ef398ec.json and https://artists.proofprofile.net/proofs/artist/9a187c45-f7cf-428a-9a58-dd652ef398ec.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173548692da29385a9f8b5d6f4e423cd10022600bb4ff24251284c0df5c2aba8. 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/NLS761700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6381ccc7663f9843885d9d14a0b73bbea94b199132907d6ffea347931675654. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLH2L1700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc120a73d2f2006469c1400f2dc4d08ff91cb92c53b5f700eea932f5fe3b99f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLS761700399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2d007e929729dcf57b11531a4d8af8ce48d65bb738d81975baed01b8cecb9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLS761700396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401b055941d374df063b9386d0c39ffd32d37d0ef45db1987bd86dbfe364c64b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BEB681800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c80dfa80f127446622f9be3529acae234295b81c2a53199b510a7febf396b. 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/BEB681900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52540fad867c84dab7a0c379ed090de8efd83635592a7a6e43310f80ec44488. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BEB681600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3767ec7d84596f454c01c13a9707a62a49be64383ad58a59817c08ddb2a471c6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLE801720088.
Start The Rage (Qapital Anthem 2017) (Mix Cut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1572a217ddd56bc42165422d62398fbfd8453f59e237debce5c6f6dba17cbd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLE801720098.
Open The Gates (Public Enemies Remix) (Mix Cut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921ff1dda42f5857ed301912dd146fe2d49b6adb6739afb2f5864b61291a3c4b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLE801720107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bee404363aa3f9f7e3bf8c6bdc405625a3f37b5e3efd709fa58ad404fd2091. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLS761600468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175dd91688d492ecf53522430690b556fc46e3fb96fbce42abbfedfbe1985f4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEB681700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173548692da29385a9f8b5d6f4e423cd10022600bb4ff24251284c0df5c2aba8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLS761700204.