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 0x114ea12e7a8f310d4fef787a944225b523a801accc3815d1ef695b8d67251d44. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/005643c5-83c5-4bc6-96aa-e2fd921772ed.json and https://artists.proofprofile.net/proofs/artist/005643c5-83c5-4bc6-96aa-e2fd921772ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing Gold Collection (Muggsy Spanier 1935-39)
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 0x9cdf077e682f3b5e99c996ce3ae192ec7888f65d8708d6cbbf358a659bf785e1. 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/USCXG1500629.
Monk Hazel and His Bienville Roof Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a5a674eeadcc0190507a73e66ab341f3beb77ee254e2be9dfe1614de04529. 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/USCXG1500630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b72c5d06988143915b71c6bcf1eb558e300bfcd30129cabfbcc915064ec0fdd. 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/USCXG1200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76bec471096169e5da47c66b51bf4d3d0b4c806beb26210be111ec9821727f. 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/USCXG1200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1121d9cd8944cdeed59ca2ae0b6bfc9901969ceef073cc7b812dd44a8b60d3e0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCXG1200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fc83cc85caa0dfccfaaf14ca54dfaed7c74c13035cf07513face91d52ab3ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCXG1200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6638ccc5b0615c5a1d803d80fd45e9f3b3cf231853f9649bbd1f480d1b98dfd9. 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/USCXG1501403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c2549746e6ebc2f0bac076dfbac62c985574d91f08168d219b835bbc03958. 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/USCXG1501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e75116dc45d593e4ed8773fdf50eb8ff002ae9749f3e4aaf5f334df9f25d7. 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/USCXG1501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d0f78b3adbad941b9f1fcb5cb89c4b478bca26e6a3978e6e5864d5a6f4661. 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/USCXG1501414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e47e08e4ccac3f314bf3c8160f14472ba74ab2636597359a1a1a217156a2f8. 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/USCXG1501415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e76bd34ebeeaa7e70f1604a0f99b31d10f5450206e0e241f118e7f3da402b13. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USCXG1501401.
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 0x0750d925aee5bb6b412de97747eb9000d039734b9f899c45c16617aaa53dfc5e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCXG1501404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4928ab73d95173c8772997b92449df5e44243d322457170ed9e971f777c63. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCXG1501406.
Muggsy A-Z - A Portrait Of Muggsy Spanier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e6535321a081025afa13370dc7b8acce7c5f3a0723b2d12b2281847b17270c. 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/GBBMR0721502.
Classic Ragtime: Its Roots And Offshoots