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 0x444f0a6ca99681dd3e229aee4b93d723c43a63f99c93caad58d82f6a98cb0de7. 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/bfefc833-6228-4094-bc09-3e2911d1eab5.json and https://artists.proofprofile.net/proofs/artist/bfefc833-6228-4094-bc09-3e2911d1eab5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Distinguished Music for the Developing Wind Band, Vol. 6
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 0x9a14c5375902efd1a2526ec378b6a91607bae92eef0a0d961052647ca30f3263. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1214606.
Suite from Bohemia: I. Procession to Castle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf232f65f7f663f85d7143f914ba54990640e57c467b45378f2997f23cc17b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USVZX1214615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8c23f752223b6962289c704dc38914026be6018831dc60f60b0c50278911b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USVZX1214605.
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 0x550d0d6a6213a00b778226514173a2f9bb995f8eff4c213619c9dd0b2584a5fb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USVZX1214608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4336e1fe581a42500b57c21a5a2dae3617f0d58723ddf7b39c11a767cdf161f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USVZX1214613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd883cd37f85b54c82be9fad72c1e1f89a7a8f3be1045facba8fc74703c04dec2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USVZX1214621.
Distinguished Music for the Developing Wind Band, Vol. 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e91b8b9ac304d1391de323b692698ed446f7ea34491f6b108868f19ea911ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1215001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf2653d406074ca20774bc441b153647aebb6d291b4d6c4a37d436bfb208e44. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USVZX1215002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8b5a06315a38d23633c09466634d13c9cc77681991a450a95ebdabc143d5fc. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/USVZX1215003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e554b06f5e63ddfd891f2b4d6ca70fcaaee75ebc3e8c5397650226e55b076b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVZX1215006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5798a000a7d5a3e793d0aed36ba729252060b94baa139ffa5a999301d6d6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USVZX1215010.
3 Ayres from Gloucester: No. 1. The Jolly Earl of Cholmondeley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7febbbc5a6c9057846d312fb8c5b0283080ac26556351ab9ca217073ce8f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USVZX1215012.
3 Ayres from Gloucester: No. 2. Ayre for Eventide
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4873d71a4a342710c1509dbecf13d4acdf8bca24488fc180e3721d5823cc7c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1215013.
3 Ayres from Gloucester: No. 3. The Fiefs of Wembley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a400307cce5193ecf0f5afce4436baeb9847cc4dcb8fd8dd80f3f07f64e6194. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1215014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c36b4abfc0b6d574523013fa96f95d23aaec306fafe7d9ac66c9a3fb95c7f7. 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/USVZX1215017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92508d5fa5046ec6afecb00d515196ea1d7b417bcf2a789cc091e5d0e4b9dbfa. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USVZX1215009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a088cf70ce0d9a7684a3deb5c8cb0ac5878eb503b2a1c3f23d2fdc96588ea. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USVZX1215011.
Distinguished Music for the Developing Wind Band, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fdef3b83d68d2d91333e7c923a22ea0f0e69a6ea6d63b5f8a3da6c05de54b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1214501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a6c177c6f8ef09c1058684bd53f33176df04bc5299f6fd31d10f0c222d4a1c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVZX1214507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89f1ecf4f0a667f1e3246b0cdaf0d619c994e8953160f64ccf4203c981a0de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVZX1214514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68af2f35770bebe3bc5c10ef67155565850f7695882aeb8f7f8927d63e871ad7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1214516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae618ee82ca8234902bdf017a2e9953c4dcab6b97040fa7b449eda8e83e41408. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USVZX1214519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e03efee74ecb7a8b7b80dde56649abbe8c1fcecf43787f8f80cae1fdce9868. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USVZX1214505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9311e4e239ca2472f471bd87f27717c610cd2712e05bd4be94096ed8fb0462. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USVZX1214513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970669cde4db5c68357bfc23cecf3402705cb0cb396a91b34faa972eb53b0d81. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USVZX1214520.
Distinguished Music for the Developing Wind Band, Vol. 3
Distinguished Music for the Developing Wind Band, Vol. 2
Distinguished Music for the Developing Wind Band, Vol. 1
Distinguished Music for the Developing Band, Vol. 4
Train Heading West: III. Train Heading West
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15881a0596c702aa12c0c25147188c6df4a20085c138fc90c570ddba985ed70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USVZX1214412.
Distinguished Music for the Developing Wind Band, Vol. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a72cc3fce66eccc4414ea30a00f62b085c941783e8ea202ef8d4eabfe39940. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USVZX1214902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc530978e3cc5d8831fe5023a0963616cab1b445de1267de6157c9722a467130e. 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/USVZX1214901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2684ae3bf9e025cde205074e3ac3fb89d965601f176b1cf24e072f5c4399482. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USVZX1214909.