Peter Alfonsus Harrison (February 1, 1885 – March 10, 1921) was an English-American professional baseball umpire. He worked in the National League from 1916 to 1920. He was an active NL umpire at the
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 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 0x1f43faaeae7e2edf08e6436a053edf0af208572a7f9229f4048aebc823d36c8d. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7526b27a-fde7-4938-bc78-66789c61b16a.json and https://artists.proofprofile.net/proofs/artist/7526b27a-fde7-4938-bc78-66789c61b16a.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 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 0x2806daeae5e5391e7d09a1ebcb150570e629af7f127855f6b785e081915a1a6a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEB632315645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e214206264b92d61208705e9c921319d05bc8cb26265d5e0d444e1541b97f8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEB632315649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe923db220982d8aad7c113447ce4c24be642e6d13c4a645dc1eb8b0621d2e35. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEB632315653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd5c16934a51262576c12386435a471d3e85b8005cd7a0a6bd0f41b2abc6e3. 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/DEB632315657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f3dab3e144f1c1e5a1badcb4790528db98b299a4d56ab8ab2077e0c511b2ac. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEB632315661.
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c16c46deb743a62b90aaa8ceb241b1b9a230d3599c50495f57923edd01867f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEB632315665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7f6e15a25c3c7202f5bee1fbda960bb93837c5f3b89b4ef64b93938fab025. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEB632315667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee5aa9d65a72cca4d6a56ec5b149cb096c4fad309beb37be549744108ab4408. 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/DEB632315671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4f94ca13bcc377d0d29521a1ccb7d2d2884ebd1103f8530f6ccf4f8969d7b6. 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/DEB632315675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4175ce7514bdb1695ba10c7e6d28e18030f42f3a57e2619739eb8930c49a190. 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/DEB632315679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1c638f7e277b3a0212024cc3e90102e8f97dc45be66aa153fe86f33ffbf2d9. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEB632315683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08fa81fe8d2ada22e8b9cac5a7e608a4c2653384a1bebc44b8efeaf757c5ee2. 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/DEB632315687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5b94978a57688851bcdb2ffb254c5b75bae5c24adae17350a64b8b78e90d5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB632315691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb868488de8c3f28a35c247b35a296eb5853b57f6d2a111a6b28c414f602a915. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB632315695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1ff48ac408b78307e02fc4ca05c0522545c82499885f977aabb43727d6cf5c. 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/DEB632315699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6009de89f383f5fb6011b4c2ed27861e41b595ce73618cbac39a918cfda647. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB632315703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415a9250423d5320ac74cf22157a03fe02b0753e7f5d1747cf385bd32b995b41. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEB632315705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b3850ec68878a18e8b60e4da19cd51c79e1c7e7fde8c52b68dbd4201085610. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB632315707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eedaf6e83abd8c4e59dc43f22e7a7bce3af635ab668356d061d493f54b4636. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB632201879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e07ffcb5b9c9a33d24388de23a74266700748295f31c543c10b8cb1c97fd27. 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/DEB632201883.