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 0xb975effdd46509c1d4b694889a80eec114c23874b0062f9eae2d06342d325209. 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/0db64475-0209-4135-b9a9-2aea5c0038b0.json and https://artists.proofprofile.net/proofs/artist/0db64475-0209-4135-b9a9-2aea5c0038b0.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 0xdc20e27e6b28f1dfec46c6fe2bf592237caa1213c99d310870bc5553b137aae0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA0Q1890532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c05e19fa12a776355f1266535fb05abacb677cdd15c1b2b2afb0c20734c32c. 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/RUA1H2092384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf587ac16b9e61790157a34f36b9119112b4cc81fb1a2d7ba08bd464a80881233. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA0Q2018551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16313263be5e5d978b44a112ee3631f29237a74b13111764cc6b6254aef07308. 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/QZES72133024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489d381aaed4bce275762045da3471285b2f10eb060c527b2264360a866cef2a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZMEN2372702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539839f1b333feb63c15c9341e63f68d37861ee8e8b0c1b8e6416353481b1fcc. 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/QZNWY2379274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a080d55659b377d8552927b343e2e68b4e1c5c94865d596f927002a6c3a88. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAW2373200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e42bdb4a8a47bacaded3d399d631c5b8ed035cea3d5e7e3430be6198da3f9bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWX2413456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747b0e0c1614e38c53a8028c56204efb67b00be2d097da6fffcc782e09aead9f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:32Z), 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/QZFYX2501558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e5674111a88aa70c4f403b3ab266511454a8601a88a674f5ab270580951772. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA82596085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23c17cb1a2b8aa39f02205d64212aa41b072cdf7e8cefe67564bbd94d9224c0. 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/QZHN42509007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c8320a4582faee834989464b326f315a69239b70be941c2082c61d68cebf5a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAU2554872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b170d79ac1c58e592eba3c1caffb626720600c1304953883be4a14643cc363e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFK2544151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87ac17f916f549afb030e5473df678e3459df061c07495c4e59324989ae6b63. 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/QZWFS2578161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc291aa3b07af8f46d9fae47722dc075ab1e0270d54c4d060e6750db9223d7c. 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/QZWFX2588466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69523770b59da5e63392b27031f244ef4e378d668e2e8c864db3aed79864c454. 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/QZWFT2544271.