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 0x2a7d886a1edc382deeb78ccbaf83efb116eeb4925772351fe9fd45820390343c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/007eb590-f469-4625-bdfc-a6b6840fa8ef.json and https://artists.proofprofile.net/proofs/artist/007eb590-f469-4625-bdfc-a6b6840fa8ef.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 0x93e6d6fe73391ea85284246ccf7ecbcbdb97d56fe74dc5cf8351bb9ee13e2f9b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZJG52590743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e9e7bd2fcb40e30b6aec9721631da3c9c0a25f42f1dd95f1d7d593bfdf974. 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/QZMHP2454887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1de76cfbf9854c2258416e3b48616d88dbc9eb202dccd018d3bff276b573d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHP2554796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2e60daa8196d3fc740fe3c2fdfc3cfbf063fd268386ecc29cac80d31fd7d59. 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/QZMHK2587331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34d00e4aed8dbed736e65945b93025b640a0640f5a8b60aa3a9f1d9791f31a4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:02Z), 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/QZMHL2549339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca66490de55ac5af954a72ae0ca7d8437dca721c9a36832a372f871a57fd781. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMHM2527873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda677695273a734c8f83e938b120b94dfdff89c532ec08a6fa131ef1a17b0bb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTGW2405019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fbcb0224ce9d2b96864a508d9116b7e8798d42267aa5540f32c5dab4ac8e7a. 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/QZTGW2405042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4e4d0dc7d25bacb41c2b1b8259763f247ad07bfc9a3f53f62efe533b9557e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTGW2405021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7e56ea0d1162bbf27cfcc9741e1c95ef9ccf1e765ddff450a710e93b96e2b2. 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/QZTGW2405022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b564f5d56a00b695ed6446d4b52dc3c0a654f3e5ada0a676d0c74176ad080. 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/QZTGW2405023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eff47f2fdba7422f178a2d275215d711c068471c9fd31f6fa6dad421e72161. 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/QZTGW2405024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b89342a65dfb37f7327155f0920d9109f0e2b03a674b02bb378b54c15b6d23. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTGW2405026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1ceb46782d06bea00a14856e291194647c257189b09a495704aa5b4ee31ab. 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/QZTGW2405028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349e3259e2b5b4266bac142bc3d534dc43d7ee7605fc213397c99aee501316b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTGW2405051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70724f2dcaffc4303dcdf98cfc461dd22124606b073f90693f5c4f4355e2ff55. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTGW2405029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ecfb513c233c44187dff66f5b579b1cd8014cd0c59b187a6c4a402ad5476c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTGW2405056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed0707247bf86a44a8d0e3f12216e1252f3b67aa4e040e2986d7339da8f0de7. 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/QZTGW2405034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da33c32fa7f28274491c343cd6cfb8120358360f9361faacb5e9e4e107d3109. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:27Z), 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/QZTGW2405057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef3a3cf472eb31f9ba613ddc828c57dd9dbc584510aa62277abdf27eaf71e5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTGW2405036.