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 0xda086e800326fc64453d132ed25344e2be9f0e098cfff97f50295d36fd1158e4. 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/1f8837e9-9a79-494d-b69a-20be0d335735.json and https://artists.proofprofile.net/proofs/artist/1f8837e9-9a79-494d-b69a-20be0d335735.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 0x94b92591242b8c0d11ea8f320acf4359e750dd646999f3bdbf48320d25743965. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NLA306600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adbf0530d298a8ff56c9ea09ef79501d65e03c17d24eeb0aca5ec62b74e3cb2. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/NLA306600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6a1f6267d2282c68128d34296465d44bea82161e676f5ff265f430929b1c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLA306600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bde8217207eb6cd99d69c50af92c6355f16bdcfbf6d32c651410bb19fb4dd27. 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/NLA306600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ebcdac8d0d662d2dae585c4a032b62f9924d05e6e14247446236c4c96c5527. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/NLA306700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6977f571992956560750bc5c8c05319c3e019eb23219b620047ff090d7882. 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/NLA306700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8be5bfd4c8f8069704377652eafb05ba7b908bcde8f5cf8db32be5c28757e. 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/NLA306700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d971be727fe4f00e0d9c2b28cc76baa3c74862da11bccd4d758616905f8bf90. 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/NLA306700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8964a1b11d90a2055f5b59a1cfdd8702c2f508d8733bd27d7c0fc711b6106b6a. 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/NLA306700080.
Baby Please Don't Go (Back To New Orleans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9c5811d3be1e7dffbc0f9d0117d36b583f855a15ee517f768fa4e184805aa. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLA306700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0092a64acde4a97ff1618216597eb5a5b40666e927d29558dfcd86a02d3cfb23. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NLA306700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d0c5eadf52114777d4be6299b3cca6f890d730c18d67f61c35b555f863fae. 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/NLA306800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c33b428349d24c0d50eb77b099d94f719bf5e5d73643f71bdc259d0e43c834. 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/NLA306800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6722040f8414fedbbb329499dbed4a7ea8408a4751fbc11e29a871ec2aee52. 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/NLA306800103.
Live '68 Recorded In Concert At The Rheinhalle Düsseldorf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd66c980d309248ee9812b428d26c6541c8df68995b74f1dff000e55bbdb5ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLA306900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bcca599a7542ba79459dce222ad97337956259c133a2820602f33705596d6a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLA306900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20bc59116435dbbd94c25d27122561435ff2ab78bfbdfb936964e7d521ed72. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLA306900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3419d02553a9608a9517f0e1daf5fb7b4e123a1e2adbc816437d79400994cb93. 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/NLA307000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bfe0f27831e5c072dc5ef272542a0942b0effdb1593a191f58aeb220dcbd35. 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/NLA307000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa520faa37981acada083bf26612ef4d1c88670e507976bf067d297fbb5d4af19. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLA307100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c2c3908c535c949e1ae76fa3955da9e0f02b0f9bbd877b0ad87ff2e958bf2. 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/NLA307200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42024135f0ffb110512bddfa9c8897a08e4b5c8b9db64f8dedd34a246e6e8ac5. 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/NLC287600118.
Cuby's Blues - The Best Of Cuby & Blizzards
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f708a1677c129c12bde299b6649a5c1d2d765fc33e136d00ed89fb2fc0e12. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLA306700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8499babec58a733221bca4cd4efe431a0eae8a8658551f718f21858b26ad3e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/NLA306700078.
Window Of My Eyes - From "The American" Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea098b019574a75d5d06fb9d5c566c3783ef64b93abe20cc16ee4886cdb26f. 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/NLA306800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0143d931f17e4ae76da86f7b5046c5d1dcfc0e5fa77265f9342b4f2b5337cc27. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLA306900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1633f10a894d66f5a9cbdb359a3a3b4aa32dbcae224eb1c903dab56accf33a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/NLN380900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1455af6db97b95cf43f9e41685dd8f46c5413ed53f57dcf96c158d8182d0ca0. 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/NLA306800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52063d5538f2d63fd86bcd7066b2aca78a5e493318ed313a0fa9987f65705785. 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/NLG092124410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52063d5538f2d63fd86bcd7066b2aca78a5e493318ed313a0fa9987f65705785. 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/NLG092124410.