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 0x12bd464e062d68c9b03ab6ade6268e39a3ccc4ffda9e8a142a06598a19a3624a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a587ae5-4ff0-4667-9993-ecee5a119404.json and https://artists.proofprofile.net/proofs/artist/7a587ae5-4ff0-4667-9993-ecee5a119404.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 0x6b9d2f7e5bac99ec704348559ab50d4cf66a9e298fa43166e694e71951cbebd5. 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/ATP131406003.
Carmen Fantasy for Violin and Orchestra: Allegro Moderato I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dda9dd2cf8b73ab52215d2c46022b957334846162f242e4b728c389cde5292. 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/ATP131406004.
Carmen Fantasy for Violin and Orchestra: Moderato II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a5f88258deddf6dd3f09b578e8c41a9a0d133f1785cac49643f94802e1934. 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/ATP131406008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70a66c52ca0f5f0f2b931e4ffa48278691fc4d88f659c39945140a9777fecb. 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/ATP131406009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b2aff8521a58733b5554de04ff3b1eed98fa528dfe1ba54d99725922f833b4. 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/ATP131406011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d35f49b6a427eb9352a0ffe0e1a4f4d769066e5f79d8baee425f28b539cc56. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ATP131406001.
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 0xb1a64a3894441f42cb351255bb77e9436fb14154656e6a2b864eca4932fd9172. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ATP131406002.
Carmen Fantasy for Violin and Orchestra: Moderato I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342a68a88fdab299e6d5cf835e218cfdc7d8cf304182f794c9ffbd6360bbbf0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ATP131406005.
Carmen Fantasy for Violin and Orchestra: Lento Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08253c650516909f2ca35c9e0c7836a7406af2f1c32e0b408966a772081a210c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ATP131406006.
Carmen Fantasy for Violin and Orchestra: Allegro Moderato II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306799280af4c415e3d7a6ceec6abd47445ed7d9b2d522d4e604cf04398b4d99. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ATP131406007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aba3f552ff186e074b8bb95a47ad49bcf035701cb659cea9562bdcfc7d935c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ATP131406010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc230745e0b88d8c6f55ced81626e8e3a0ab0d201c5d7a7b97c7fa9ee687366de. 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/ATP131202901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b09c9fa3809fbb02ee27dadee493fe5ae82afd8c77684963247eea9ee82d58. 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/ATP131202902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f17522d4b51b999685ea5fd12b82adf412e9757112df876901859936201ab3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATP131202904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a821c1fd5216b2bb73b959d37eb3d1b1d30a3807dfae2b1565ae71fff80c4c. 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/ATP131202905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec034253936a8432f9c2a3949b203d0edd5430c18b18d4a7541dba5e7a6e1107. 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/ATP131202906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d849e7b6f45e4476eb4e9bc207edeafbfb170f9f4aba6a2fb2b06e699f86001. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/ATP131202907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc84b175cc113b3f7ced2a96c787c056e2d33f42fdf17844e15743b3f7e294a. 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/ATP131202908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd75494ea5901117749ba56e77878543735ee49f040a0d6c17f05b6e2604bc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ATP131202909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e585a080997ae2a6eeafe47a0ab0daf85a9eb5e91efc4dff336f4d54e9230bb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ATP131202903.
Ave Maria, Wab 7 (Arr. for Brass Orchestra by Manuel Egger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ef1b1ca2328318cdc4860be8b36d73c805786070f71f265aefd930a791c7a6. 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/ATT592301501.
Locus Iste, Wab 23 (Arr. for Horn Quartett by Klaus Leherbauer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7dc2d9401bf06f3b1c320c3fdab1f6dbcd7e70e503fc92141dd957adfe179. 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/ATT592301502.
Tota Pulchra Es Maria, Antiphon, Wab 46 (Arr. for Trombone Quintet by Raphael Stieger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965cf4214854021cb7d95e5478c92667b19518f105f7695172856984dbc07c3a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATT592301503.
Tantum Ergo, Wab 44 (Arr. for Horn Quartett by Manuel Egger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994d9cd188bd5c28949aef9c985f68761fe423969b65161e909ac6e381cb872. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ATT592301504.
Um Mitternacht, Wab 89 (Arr. for Trombone Quintet by Raphael Stieger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1a7487bb427eee13ba815d74e466ae088a9be2eff3a7fa493fc5370c9bb979. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATT592301505.
Symphonie NO.6 in A Major, Wab 106: II. Adagio. Sehr feierlich (Arr. for Brass Orchestra by Manuel Egger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea3f2306e598f0a26fef5e52e3be10b78be37b4187201d04944473912649171. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ATT592301506.