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 0xb25af97e1dc52fc76604b56c567c8f6a55d46fb56f8e5c2855f54b9a661a4dfc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db3ed3c5-dc9d-4a2f-85f0-09ab8b0a600c.json and https://artists.proofprofile.net/proofs/artist/db3ed3c5-dc9d-4a2f-85f0-09ab8b0a600c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das Neugeborne Kindelein, Cantate Bwv 122
Soloist Of The Freiburger Barockorchester
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 0xdfe89b5e03cb43434e6b54e3d66ed0648fbfc60a5a86b1e36739401da19efbb2. 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/NLN580506512.
Ermuntre Dich, Mein Schwacher Geist, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e13a0df41cc00a87a4c9ce9d67b0cf0759ace5ca9ac1ad4f978d6e1f88fd6d4. 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/NLN580506514.
Freuet Euch, Ihr Christen Alle, Cantate Bwv 40
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ac7ae9a0db8bdfcade747392e6d2aac95c9f5d8df4a277dd78ecb55d3faa1. 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/NLN580506515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a95cd2cd7a1658e01dce13b06ac51afcb5c4f8f33d7af78c5360a0dff7707c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLN580506516.
Gott Des Himmels Und Der Erden, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198fc6f10d5105f0277782865f53ba452ca75daac33fba41bf596d0860a5d3fa. 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/NLN580506520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb35b3a4ba8897444cb10043a54a180a6c7a2aaa9b3ab6f1606828f04fd0b89. 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/NLN580506523.
In Dich Hab' Ich Gehoffet, Herr, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824dd1fe99c00cec89b4c527175de4ff9c45605d3ca3b3732b9c832a301655da. 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/NLN580506524.
Lobt Gott, Ihr Christen Allzugleich Bwv 375
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45d5e773c8c7f085b894e66ec6b63fa7a1c950a15cc558e13dfff86d8f9226d. 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/NLN580506526.
Lobt Gott, Ihr Christen Allzugleich, Cantate Bwv 151
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7b7b88b1b16abec4e742751fdbad74d8dfac6f02c5d43067db438d1aa21bf. 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/NLN580506527.
Nun Freut Euch, Lieben Christen G'mein Bwv 307
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6abb8e38993427a2208326985273e2d6b7a7f3eefbdfc9bd54b046b46a4c041. 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/NLN580506529.
Nun Freut Euch, Lieben Christen G'mein, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c36bd62b908a1bfe5f10e99823a075b08729fe0440d220cb34042b48c0875a. 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/NLN580506530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ce8c19a9edd59e556a5f7e60fb9c4222772c170bafacfd860f34c38936380. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLN580506511.
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
Der Tag, Der Ist So Freudenreich Bwv 294
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d07ebc1c33581012cc0a147114b046c82549262290f87dde631035aa13a78. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLN580506513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85439ce0753153ac2b52221c9581aa78459c0adf2e458edd27418742bc1619cd. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NLN580506517.
Gelobet Seist Du, Jesu Christ, Cantate Bwv 64
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020db14284bfd6e39ee1e928a4f95abe1fbb5d70c078d8de08fbbf59fe8fc2bd. 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/NLN580506518.
Gelobet Seist Du, Jesu Christ, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f02936c8db31e02b1b98ccffe28584bf57e20d4ae66f5be27ee0667024c45d1. 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/NLN580506519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d8138a0c3e747abe9356a023639708f712a5ab733155f1abcac424cd72e8b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLN580506521.
Herzlich Thut Mich Verlangen, Weihnachtsoratorium Bwv 248
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2fb9585ac486b1cd1baa51ea943f814229d9762b111530f80c413d2a1bec75. 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/NLN580506522.
Nun Freut Euch, Lieben Christen G'mein Bwv 388
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e5c36fe639cf561340c4357acd956b8b1617858073a44db01620696b30ac9. 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/NLN580506528.