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 0x9b0043a2e20927aa2364dfa0b9de393404caa1f76ff1f6ef5b4370294d77cc3d. 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/aa725e26-db21-44dd-ac80-467c7692d18f.json and https://artists.proofprofile.net/proofs/artist/aa725e26-db21-44dd-ac80-467c7692d18f.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 0x3e1b3c523927695d10b092eed4ffd4686bb0d4bc81fdbc6e0425c8dbf2e00fc0. 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/SEBMA9034020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab6d93b669ce8012b221cf4155148f0185a2e4c4f698d7f4c755e1e1e2560c9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SEBMA9034080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737c00a784c4f7c80317491a0e06cb317a6dafde73afa5e2a79137c1fecec27b. 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/SEBMA9138020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa67d1290bd5e299c9ddaffbe33758ff36a13e6ffa5f7e150d872e5311c2bc. 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/SEBMA9138070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c4ccf0a6e6ead7a91f1cb74f7dbfcdafcbcf30374c12f895cdf1396db8ea6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/SEBMA9138080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e01a456581029e03f2a3d56ba4e49505ab6d78a75346fa818283ed7d86d4a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SEBMA9138090.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b04e22293c244ea40c1bd259f5dea35adc4415168dc0b667443c3bae83408e. 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/SEBMA9452020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464b295177dc756420d5b0aff244a38ff2d66979baa844e62863f53f330966b. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/SEBMA9452030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484702d90226fa1d2ae6b8ec33869ea23134254d81dd8b15b72dd9f5ad2a7de. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/SEBMA9452040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923875f0312bd4207c4c84448af49441c7f0583d00bf1d9437a50ed33bbe69ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEBMA9452050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b7537f33eae4ecfe3287023957f99adde234773c8d747de6c868dce8da83f3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEBMA9452060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebee1a21e5a173653ca54fbf9d18698f1665a53d4a29174bf7191429d038b56. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SEBGA1100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61b029a66996ded7713dcc6fcdcea6f2aa12c02603b00d181557983f89322b2. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/SEBMA9034030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1310fefa6fdcb9814242a5108911c9579fb4424cca783d37f1830e2af76e725d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEBMA0200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd11182e7acdc2cd8c71d6e34589c0f2e913d0c07990a343267e15bc562089. 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/SEBMA0200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac92343377ddd74cd481ca8493b2227c7d600425712586a72bdf20de94cbd9c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SEXRR1200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8036feb62f560d9b17424555151519561cd8b4390494b038ced4b49029bad58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE2VC1800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b0a4b6b3d79033aba5bc344169226597bd7f14f1eeab1bc166594683e8bde8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE2VC1800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe20450d61d18414bbd8c792553a74ee3a895bcf6fa559e7a5d1e5c289087830. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE2VC1800517.