A piper is a musician, a player of the bagpipe. As a noun proper, Piper may also refer to: People Piper (given name) Piper (surname) Arts and entertainment Fictional characters Comics Pip
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 0x2bc05af014a10d10a0dbf379bca1771b6de6e4cd722945ea1855dc2498de9f86. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91998cb9-a29b-4350-9480-8fb1f87c155f.json and https://artists.proofprofile.net/proofs/artist/91998cb9-a29b-4350-9480-8fb1f87c155f.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 0xf5f50394666a0655762ebd3af7384c681a0e9bce56a74adde0eb0c5efbdb9ac3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPC541803722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414ea992a66ad06ed1114c078c6fa60f09891ea2cf88a90ae3da2619ad2f9c39. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPC541803723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad950218e735a743ab2972ebccf1e272a651e68f82375d263a0001c86f7b985b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/JPC541803725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df99bd5fd113a819096ba9027f5f977b02fe818abc513f2d0cb3a836d2192b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPC541803727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f390a1bffb0e4b47a54d220e236335b4c81d2fb814bc992610ec769872eb6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPC541803730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b810201c62b7e03b33efd927a443084e13c49e7fdd844f8b2488a5b7e2d3139. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPC541803716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3272e2eddf25e423a77daf57a2f6a2b79734e8b9d21a9269a82da15b0d9a2afd. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/JPC541803718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a69a78e059ec440d0187633cf1e340f3e50fffcbe39dba7766aefb049b7abee. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPC541803721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0f9f407aa22f99064fceb884ce5a65cae8480cbb1d1d79cfd9d109b96a125. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPC541803713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7513572b43e211bd4ead4c8ae9bdecf9c0445a6456426979c38aece2475e18. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPC541803732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f4d9cfd4395719cbe3e4e1f7620800c6be6c9746987465f6989ca14347f7cd. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/JPC541803734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32b43567ca22c044c2b43b1726c18302531a0984ed0cb9b57eadcf52a1a1a8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPC541803735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7513572b43e211bd4ead4c8ae9bdecf9c0445a6456426979c38aece2475e18. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPC541803732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb874a4ad2bcc26009c31a920154dad943f38fdca532e03fe7ea776f17a60bde6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPWP01970547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c2afc85d0306e4f35b45c8e6b8d6e2ee3ba650b01bb649baf44be2c373122. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPWP01970548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a7ef675e7cfa367757d0183ba49f4b1dde6f77738697340aea62c7029791d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPWP01970552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7838af4b30d68da6108ca61b5e1268a5b80e9817afce63177089e819b1144. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPC541803714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb567e58e72e280ea5cbd0abf027fef5f060ba807f89c76a1079f6bbb1b41b1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPC541803712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84a3fff3ae808f9c536396b56005e60dd9d8cc26d47a238740ad1308a48863. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPC541803719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7513572b43e211bd4ead4c8ae9bdecf9c0445a6456426979c38aece2475e18. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPC541803732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a69a78e059ec440d0187633cf1e340f3e50fffcbe39dba7766aefb049b7abee. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/JPC541803721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0f9f407aa22f99064fceb884ce5a65cae8480cbb1d1d79cfd9d109b96a125. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPC541803713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe9f605268b92f8f060646f89acb0bea3cc60f0c98256e013863fbd80083ac. 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/QZK6H2252152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42097fcb737de727d798aa7dee79c0c2248da89a1b48bad4be5a3bc3df75b8ef. 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/QZNWX2037406.