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 0x7a4eb6d677d2a0785bdb6a11e2ce6dd664d2f5f153ff65679204a066225ca8ab. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9865f44-9356-46a8-8cf7-b2f1c631b8ff.json and https://artists.proofprofile.net/proofs/artist/a9865f44-9356-46a8-8cf7-b2f1c631b8ff.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 0x56a9d95c20315493f0a90081d1b708163b8902d8f1057e820cae8ae753fef477. 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/GBCLS0300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561f2f360e70cf5e5f8f3df191e50a85445a4705c1f2fc7155c9c0b4b57a1a5b. 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/GBCLS0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c2a0ef931997f6dd30904e259e2312e19335e9102d489c803a3e63896cb957. 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/GBCLS0300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf419455e6191039b6a4a131dd8733939b9b5b51d4ceb60edb43bc2e643daa78. 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/GBCLS0300018.
Adagio Cantabile from Sonate 'Pathétique'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bfe386f26aba26fadac6400d0e11d66205fe7d04762e825f9a533427dadabc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBCLS0300008.
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
Ned Rorem: Piano Concerto No. 2 / Cello Concerto
Who Wants to Live Forever: Queen on a Steinway
Don't Stop Me Now (Arr. S. Mulligan for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb279c2081e1172e678b6c0b30c67f896a6e82161335a89f198b66cbb0043a9b2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USUW61900196.
Love of My Life (Arr. S. Mulligan for Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa470f2734903d0345b2fd080bb6f8c5085df81f88237bca3c186c000821864dc. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USUW61900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29834acbf778f931f25ae6cd8dbf9a60a639f23e462891e57186018b0a793daf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUW61900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433709ae9085258f07fa10d8235787cb61d87da678275d1bb63437ff3c56aab. 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/USSM10410475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07e1c2ae7806f7627c0e2a0035d58370eb607a82c0387eab79d22a2904e821. 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/USSM10410482.
Part: Arvo Part - A Portrait (Kimberley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c7f98d2a833c07cb9287145abc107fc87b130e5c720c6423b802454ebb387. 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/GBAJU9900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433709ae9085258f07fa10d8235787cb61d87da678275d1bb63437ff3c56aab. 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/USSM10410475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07e1c2ae7806f7627c0e2a0035d58370eb607a82c0387eab79d22a2904e821. 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/USSM10410482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb26cbb92aa9e253642f09f0d6d29d542ebce879ebabb76b83f393c2a827c32. 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/GBF071402290.