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 0xbf631499b39ca997416e2fb8dbef1fccbbf0e33c0458360dee5d980161c98c37. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b84953-a00e-407c-973a-03aaa158b9f2.json and https://artists.proofprofile.net/proofs/artist/22b84953-a00e-407c-973a-03aaa158b9f2.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 0x7fb5b7744a5b8aedb6c82dd446c52a52a608adf95a6f8675900e7a9d6afd15e2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:27Z), 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/ES71G2007977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3173272ab0a22414254d9a51c7f83836aecce600be14a7d9a8056990ece484e9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G2007981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55ddcc19a02c9f25f0375051424b41d03ca84e5addabe0289d2d4d6bc707120. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/ES71G2007982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4421d66faf7a32549ccbb05d7406442e006bf57677206eaf47ed3bd8a2ad5347. 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/GX38U2411504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55682f85aad9a273455fc0e93dd9a407893799339b296c1a6b7f0c72d50218. 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/GX38U2459286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02796fc4db80b5859fabdbac042a34a716ef8691ad8b3a7163ef993e400c9c2d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXESV2498004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1cf1f9a336e6d61a8c09e46f42d63f83deea584b82b192cfe5cc76d05c2f7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXESV2436592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c2908b76efc4c9e31a1b154d57a282dc6241ea96185d31a4b49b3418aed316. 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/GXESV2479489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66a6ed3dd1f02a569a3d1d9de3c953c1c2b5326fa626c949846cabb5807848. 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/GXESV2458761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792a986f68138cb7327835d975e98d445f307bd5776a934de6ec6f6840d1f8dd. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GXESV2424415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a290b1dde56340113c74c947c33098ce8b254802e4efec241735bebbce03b2. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:22Z), 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/GXESV2436264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb491a0dcd20204b06c14838ebd74dea37316f924e306b8d7fbcb44a3a6006. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXESV2417936.