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 0x1bbf3acafad479ac78c0820b5490d42b1fb37b17d96d006f4de1552fe1793b23. 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/e9f8c0fa-0c13-4ce5-b7c7-9ab301b50bd3.json and https://artists.proofprofile.net/proofs/artist/e9f8c0fa-0c13-4ce5-b7c7-9ab301b50bd3.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 0x72ee451fe22c86c7f2e479e69d9ab7a4df3508d6d45e9d57d77f77025614a969. 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/QZMEP2075721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6f8786451d60bf22b654b187e5c35c1b586e473d27df05123246479d651c20. 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/QZNWS2011864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23d86ad7bfa02ec61f67441949d5bfb547dfec126bc5d6037b3a00de3ff829. 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/QZFZ22107486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7365229856a2b8f51e79d74f7341276af2373e11780daf203a52bb9d88c04371. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZFZ22107487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a601ebf3668346cf0d36e9bfbd1d037b478f3f270646812cb4656b275b9f91. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ22107488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb41070527623e81be8e4d54f0d9aaa198d9edf76bdad2c9f71ff0c0d900e8a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZFZ22107489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a91ae4ec56de37fb0d46d5dd0880b00fe57f1c11ccddbd3301ba130df4996c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82188526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7be5665228de8c2fd72f46247445eba9a506ea983d2a218f5abbfbdc74f90. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTB32256689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf406774ff2ab234769f21d3499b917c75c774bb20413c47f9f65ba2daa83a961. 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/QZK6H2375288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3fa1b1b4f56548b351541e59a6de05e0e1dc951eee8c133ee01f643db3e0c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHP2332699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc711e983913df53cd60e123c3018df5b3ab2de1b396109739dc940b87b7120. 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/TCAHP2334907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ae51e8ad1d2a300f85eb2e40c71ffd6941fd71047f7a725a5dd27665f6d1f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHP2334927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5dc8ac4a7d16050c7bb3dccc2431beb78363fa37d4bb93795f8d3beff90913. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAIH2437361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2752897c345af8c57f539bb13e254b5bcb78d2076a56e52a65edfa218b9bd08f. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZZ7Q2441301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb608cee5efb831d431ffc94ddc5e3a6a2216b9575cf8c286d970f20931af65. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZMEQ2588428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c854fe4007e414489a11d7fae4491ccebf4d5326390265fa23ae9e1c8428be. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEQ2588430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc10c81b6c84116f3030b2fb51ba1a508fcd541c45a6121a9173db6d46006a4. 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/QZMEQ2588431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e2cba313e17135940f6775a2e4a4be108b0160838d6adca7fd38fc991092f4. 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/QZMEQ2588432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1676287816abb2e2041bfcee774873cfb8ca8ea7c51a29d26c57aacd64a790dd. 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/QZMEQ2588433.