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 0xda27c4cbd1748520b9f6bc8b1aee28e1c950018aa3a6bf8f25d8f0fbefafebae. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3d2d2b2-929b-424d-b7cc-e9707479669b.json and https://artists.proofprofile.net/proofs/artist/a3d2d2b2-929b-424d-b7cc-e9707479669b.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 0xad53f02afb8c090698b6bee933924bd6443838ab2c5b27ddde0bd01ba1c59087. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/GX8LD2422204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e737093076e2cdedfb641fd82f5248e0c3b68cae1b0c2261fa4d6a781b21f. 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/GX8LD2474007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc48294c2c7485c6c4e9d8ca776405bb76f52aef8997c43185d0b33a0d0431. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GX8LD2461234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee18e9cd5c85343461331c85264903923ecafc5591a80285952b7668d0238a7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX8LD2474224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5615a8cd7f8cfa83c97c2ff917de9b1c56a6964a618294adab91081773380fa9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX8LE2443005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e70480673a304ea367c93ad12ca8b05d40ac77d674fbe84b8ac208840ed3a32. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX8LE2412303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0727efedb074c8120f36ba8d39ba3d7d030c727d88e0a7ed6e6c8f8a0322a8. 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/GX5MX2456534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a02d031ec39295412628e37b870c54e74d90feee6339345e8c5b5a0b798b2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX5MX2491297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781084df02cdce7b6c4bc4ceedfdaff77b1799d7f801e110bab7ad9d7ab44313. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GX8LD2531838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af829423b4bc0cd4b2eabbe2a8e8a45dee6625d69cb31967b23d927ad8a5b34. 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/GX8LD2545391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17819cfc5ed1c8201bb20b27250abae7e4ea70bcdc7e59bd16d93ecb8597c0ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8LD2587908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc982881f484fb994142f65d01bb2c590a65af5e70348d6eec6ece400f15063. 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/GX8LD2599013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0633975af056e104a47d54b9c57da3a37a09cb340b0e8c98e20db2b53b4dfb. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX8LD2578118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2b2e4e0fc47360eca735dc2a5303f570a400012b7ca323408ca656243f1d9. 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/GX8LD2557520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc737967f8ee33391a45571a42e59a98c12fb52a43a2ac9c8bf11465daa531c2. 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/GX8LD2517053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce845b713f2b2a21401a0c9f9a4f2047774a86562f84dd70c275ea382000d1fa. 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/GX8LD2538181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec66a50ecfbea85a15db787a8d880b74b094656bbe6c1072a912f734eac9e36. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GX8LD2524747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b74b4ff44fadff5ecdfdc8225794b3bf4f7111d66ae4696dd2e01e6b1499c0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8LD2527000.