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 0xcd9ed4fa8d5f59e2d5f71c1d8be420383a7bfb894a379f4906fb220e7f9c8524. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d426330-b9d8-47dd-a051-2e7d02678059.json and https://artists.proofprofile.net/proofs/artist/9d426330-b9d8-47dd-a051-2e7d02678059.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sound of Music (From "The Sound of Music") - Live
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 0xf9adb8aec3b75196bd97fe39bfc823eedd32369f02854fe1fde8e067c2d0b1c1. 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/DEUM71401711.
Happiness - The Music of Joy (Silver Memories)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597ac65ee0f518645590c836f64f8ccbb04f9643bad30f632d1753b8b1e23a8. 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/DEUM70709249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119f558474a4de69283b2593b2675422cf30d09c8caac0d886a53a7928f4319. 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/DEUM70709237.
Someday My Prince Will Come (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c57f009aa37602fafe960d13addbc9162d4e0fd4003ba86652428bd66cf40. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM70709243.
Somewhere Over the Rainbow (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98d8ecbff5b6241b6b37c32388a30b9ec88bdf8d5f4da2c309bf1dbf957026. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM70709247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597ac65ee0f518645590c836f64f8ccbb04f9643bad30f632d1753b8b1e23a8. 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/DEUM70709249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fe751e12c7edb563580f475a5ce342d9e0b7d9e0906ef2ef32355eff046fe7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71203306.
Maastricht Anthem - Live in Maastricht , 2012
Der Königliche Männerchor Mastreechter Staar
In Love with Maastricht - A Tribute to My Hometown
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036f5a15f76dd154931ebe296657ed8d463d52c2c95dfb68d769dc80af42dc6b. 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/DEUM71203332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119f558474a4de69283b2593b2675422cf30d09c8caac0d886a53a7928f4319. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEUM70709237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c6d8be69cb638c2c87426d23d94fc11efbad68f4e492a555865bb12cc17fab. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEUM71401708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb828610e0a9969b805aa2ef4db6c1ff0e6cb40c13cd8ab3609ee7ab48cf707d1. 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/DEN120304437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd853fbbdc2c2d71baef3e8bcd0fbcfddaf3e26ad8d53cd726703cbb656f61b54. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM71401715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd920cfb91a4ee74331d678602d8f025a3121b7d242a25e8d3def5a8dd47fd1. 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/DEUM70604438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f655d4cf791592a43733d8247b86e5e32895a12d9ab2e5075f5b9837cb89591. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN120304407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9195336fc2063f3cd1e14617e68ac43069d580aa558b7a55d9fc3f5ff3747. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN120304411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb828610e0a9969b805aa2ef4db6c1ff0e6cb40c13cd8ab3609ee7ab48cf707d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN120304437.
Im Salon zur blauen Pagode (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7564e015f7557221f0c37f454b5584df1d14a8aafa18bb075f5829994783e737. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEUM70709246.
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