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 0xcb4619e713120a1994a96358514eaecb4d29b6dc46846ec46e92bd02d4f4087c. 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/d8d8f74e-594c-48fa-9371-34cb0db679e7.json and https://artists.proofprofile.net/proofs/artist/d8d8f74e-594c-48fa-9371-34cb0db679e7.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 0x4d375632727b96fe4037472888739e2c37167dc30b388764ce8cf854f6179041. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAEM1979014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe885c7472837138a963fee0c601a4a8c51e34601079b7e9c118e5bae946f55c2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAFN2142912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e948b5d139be4ce061a66e9b017545f830dea1ea027109d468493cad746f5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAFN2142949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181a34901320f32a9b26b80ab04f362222befef822aa09195bbdeb187bf0ec2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFN2142965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de14c83068ceef5747521bbd215eee90c3cf4031f17e9161ba45be23872d395. 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/TCAFN2142979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481e617d8732b55b3a22668aea96fd7fbba75ff685ce3c82609edd12e329f0b. 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/TCAFN2142985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6a0fffd9083efe79e1b904ecb3f32c7a5626aaee70b44c654ab34146f2db1. 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/TCAFN2142995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819880b5f07c5409e6b116e09ca4c853cec63415479ca8ffb9a030edcd38834. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAET2034644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3468b78ad2fac80f7e71e3f0e4916e615eafc88700060d88f79398adb89b403c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/RUAEX2214051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16af66b0f2c7ec1e67a72e49c2c7293bbea3b47e79c15d764373afe801eef34c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUAEX2215283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b800951804afa5e9550d20de95713e3c2b2bbbedbe1d0066656d562fb63d3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUAEX2218418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03d9b46fd18de2493e06e43b6b7a796cf7acf06d3819420a5323a0fb368dcae. 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/RUAEX2223469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaafa55da8f1173681e0d8a087f9525ea9b70fdbb44db8bcf82d815c9023dd0d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHL2325388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6edf7b6198763059d13c0c1538e7655ac377962ea6ef1dfd91deae2f04bd8a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR59R2405297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c51a7e2e9ddff964e1cef7ffa4e9a7c85d78e1cea03e857e6202815f106ba1. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FRX282449066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e8e3b1b9701df318a77fcdfae700819f47d14a1ee32c24e60be50db6c49d12. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX762401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24475389253a037ca790f179a313cf779e091ab0ab9b0991586f496989fe996f. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DGA062454729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1ef87d8e0f1a249b52a6554ab5fe4c56858f5d0f02f335e5a79515bfb1a91. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0H2486474.