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 0xc05bc4763128607cecc8a7301161e52bc1be14f8143e81f09886414314f9aabe. 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/4f4703c6-b74c-43fb-8264-d278f7ef36fd.json and https://artists.proofprofile.net/proofs/artist/4f4703c6-b74c-43fb-8264-d278f7ef36fd.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 0xd65cf4109c9a69963987787ebc0b8dce9c57001cfe0c14e78e4bf1a2ed06af61. 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/TCAFX2122818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc5d2539fd35777f7022bd90b2cf511608de15efe7b49ada3e2ca64a6747da. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWQ2278730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d8b181f9688610656289732997c5825bf06de3b82f052ed4374ee1c2c8cd9e. 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/TCAGY2366484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff4776e1b248d0e28a105f65350615e441625db56561f67d27585ebe632119. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:44Z), 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/QZK6Q2358314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ff4776e1b248d0e28a105f65350615e441625db56561f67d27585ebe632119. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:05Z), 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/QZK6Q2358314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2a3c42a81f129ec5c0c382ccc389335b3efee85dddd2bad2054ae9dab3d88. 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/QZNWS2304728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2a3c42a81f129ec5c0c382ccc389335b3efee85dddd2bad2054ae9dab3d88. 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/QZNWS2304728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210b06012555ba7155054f9e34ef855858625d8ae6af668166da9c288d50edd. 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/QZTAS2351844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210b06012555ba7155054f9e34ef855858625d8ae6af668166da9c288d50edd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2351844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecebfeb7e97f567ed5bc5c08c331f499516c38549a575ca33a76c6eee87d3ba6. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTB32344776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989154f7964a905581c43737520a141b03a03d263aca4544accc38073775acf. 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/QZWFR2329448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989154f7964a905581c43737520a141b03a03d263aca4544accc38073775acf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFR2329448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7da5135fe0e7204e36f6e287a7f3e27616fc191390a727e2eb45b385f5f76. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZFYZ2404617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68138954f410de07aaaca06a278fd330a099c53fc0eeb89e02faee352d3bfe9. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTBE2459247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f3d0f7b20cab4b81be089a897bbaae57212c89f41a4b8d55649f21df93094. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBE2459248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd06dbe670d7328144d0fc9df454fe490d0dff4cdec121c5cc2b34bad4a1bb. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZTBE2459249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f3d0f7b20cab4b81be089a897bbaae57212c89f41a4b8d55649f21df93094. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTBE2459248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac051a3ec4e55b48c5660916062e5d6d4c2fec765f454edaf8bafccae80d0e9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:21Z), 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/QZHN42544866.