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 0x9ceeeaafcb3bc3d46cd05d981d0e2a3367508353a78de566889801ef760212fd. 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/68a8bcf8-5469-4634-a73b-2facd47bb02d.json and https://artists.proofprofile.net/proofs/artist/68a8bcf8-5469-4634-a73b-2facd47bb02d.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 0x21f2c0ad9ab02586122d6f006f0d14b9d8dee7bf7fb8ec9da44b0aa2db257b0a. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/GBSMU5539746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0236ae132c35f3278816ad331ab8031ff95c0fab4e1cde3f521cd3a3e84f23. 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/GBSMU5539747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d903fa6a7a6c19f298361fab59dbd4b89dd8faafbf114970eb12bf93ccffd54. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBSMU5539750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0399e30f2c88cd808afd4658781c51af0bbab1e7de6c4a737417c575512f32. 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/GBSMU5539753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b01186c4beff95506be68f985b05c467fc70e1b4e7361735fe2eac0a4eef8. 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/GBSMU5554520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bce01a38e7862c1c317e1a9ea80e9bccc2610f3af1f6b6c86c5f3b5b02fa8f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBSMU5617183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2686885932add5cc36367e2929064b23f018e79f42e13bc2677f8d7561e217. 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/GBSMU5617185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cada43c1005848098175d3012b7a2efe8332b829b3de671dc4f4406e94069d. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/GBSMU5617186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70714681d18f565b0183b2ca73811862eda36b25e6c5faa248a2d701c3607b1c. 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/GBSMU5617187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe2febd0c08872354118807b5e65c6fe66c2fe5aa159a7050fa73ba1ca91f8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBSMU5617188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02133d4b1386dd16fae5f52728d8e1b97a70485a54ec9f87c35ccbdf88d1db99. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBSMU5617192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ea3e5985b682a2e09215ed349b83c87e9cbd732384d33459c1bac24a520d9. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBSMU4865185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b229c028a3458bcd53cc58b1771dde9bfc5b9d29654452368c9115da1722ab. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZLQR2058732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c937d9a57719cec519fa6e50883daa3fb26b2bbc1fad9db856bcf7d1f0684. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SE6QE2247556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a20fdf190692ca9a658daa2fa162470c6b8eda2a98ddfdf8eb1044e9409882. 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/TCAGF2295122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87a0e4b2ef05e48c593a6653993cd2b2dcfb361d2e30fb0e2f5c327581b2f28. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZGLM2402086.