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 0x22e4105e7e43d1ba9c0bcbac157be0fc48107191e82551c553ffb87933b19102. 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/903c3c4a-70d0-4c5a-883b-e151d235f98f.json and https://artists.proofprofile.net/proofs/artist/903c3c4a-70d0-4c5a-883b-e151d235f98f.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 0x319e07674d06b17311f943e67d6b1784280e47724f4bc7a744392177e33ef84d. 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/TCAFY2150294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1270a943b7388ae658ca134222be716b32f57c26489a86b7762ab3e86ccf8a42. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:53Z), 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/TCAIG2492003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4a925728ee542209e187b12f852c65d4b6e6f0c25fcb5a3e2ebe7fcaf26afd. 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/TCAHP2359340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45635b133db3ba46286ef794d7bf8389c4249406b67d9f44c9b11026e8684c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:20:27Z), 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/TCAFE2022581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956052b061597280517e43ca469f67670fbfb56f65ff812b1e0ee2f0cc8e02c8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFE2073695.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf5af6543a045c6c535b1115395ff32ca2ff58cbba218610dd0358c7bb746bb. 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/TCAJK2528194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564b6735a9c444b27e0b0632c76cdbbb81138bebb357ada9478dc5944c8114e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:35Z), 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/TCAJK2528225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db9ce1986f05dacbb26b39f296d9c32681605651f6bc9c90fe8b1efccb5a264. 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/TCAJK2528269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232cfd018563f1c48f286ed5541580b7076323ced99e0d5b91c0ef3cf4f69f7e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:19:04Z), 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/TCAJK2528313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17119859229a73b1f8b4fc0a668daa3721ee4e7f8601fa63947b525214e8da1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:39:12Z), 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/TCAJK2528405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0be403e4302ea6955525c99eac44bae952beb8ba17ce56f051089e8c894b25. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAJK2528430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df507a97597ba93de67f3b863fe7c9740d477104a24b460612e0a6a7ced6cd9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJK2528467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87b8d4cb3b20837fa495ca5089f19fb94df0e7e23f367acdaab57868e326e05. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:17:51Z), 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/TCAJK2528492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f741b25c357d6c4d037ce745191c9857110e13dec3f666d4d4a552827b59eb2. 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/TCAJK2528518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603edf911d42c7b46ed4e3bb8d5a90b6bee7575e4e7a06e59ee4685902e15695. 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/TCAJK2528552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ffe259ea440dafaed0dd94eb5350337d0e48b2ae29cbc0d7b832d5f864896d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJK2528667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee8dba706aea34c6e91226811cd95ad5a13112dfd009eea87558e0195ff4f7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:33Z), 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/TCAJK2528682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154db350768fc970983cad0c0d0daa0717ee89066e1220e1d12c66089970dac. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:09Z), 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/TCAJK2528709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9982d4d59561a315f6bed439070a374e496986ca370ab2fa5b89a449462490. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJK2528733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5817c5de6ac03456b41c631c43c12b5cc0b2b523ef6cefc88e48ad133718a3d5. 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/TCAJK2530199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94cf25d0fe80a78a130bc8e1df2fdb79ef5d9e5b4e3becdaa2fb76ff3134ca2. 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/TCAJK2528792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920864d04a5da528f68f5065007e4929b2083ae2d2a6268505b9caddaed023e6. 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/TCAJK2528805.