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 0xd4b5bbe3cf71035a44e98563ad40424cc711290c40d87d882f10a7d635541ee6. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/019e6dad-bd6e-43f9-a59e-b879cdc2d726.json and https://artists.proofprofile.net/proofs/artist/019e6dad-bd6e-43f9-a59e-b879cdc2d726.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where We Come From (Chicago x London Mixtape)
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 0xbf7b41e303c6b48c6e7d95cc554f81566fae54c810ca0a123a2c0d8a5409964e. 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/QM84B1820001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23c1b0e3043297bb9c4bb9e42e888ad192d8fbbf66dd61dabe9233349c7dc19. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QM84B1820002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbef94dffcfdb634746419d753c0bdeb9e0e84eb4ad5f304c10f9c72f8019dd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM84B1820003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19feeb45b69b5d3bd6b8f1fab78d272e3ea463009a77fb7124af95c7cca895f1. 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/QM84B1820004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd39841f21e5c91fae25dae20fe3e2b863ca18d5a62968bbf24d8a90aa43b4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM84B1820005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579bff4ab4e3b93b20cc175ab9f871618b3a9a981e3bc3220b56cfb8f94badc0. 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/QM84B1820006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a31f1f3cdfaeddd12cdb8a6131185e9a9e95ae5646dbd3cc3ae307b942c41a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM84B1820007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb38c85246ea3143fa3007bfb0afc25aeb6e2b0c1bf4140572fa59b4827aedd8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM84B1820008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3d1e9adb2bc69e9ba24151f1da89d53c763478cfb54d848284ab03323ffe7f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM84B1820009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628652b21a5657dd010824a875d49f99a171775572cd95d35970e9f21489792d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM84B1820010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298e243cb29a6b0b68b5fa56397eee3f212d709d255793f0717029bf8d437b3. 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/QM84B1820011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da1aabbfaf151c7a7e8588830c5cd2d9417739c96a036cc7fe9500a7f87aaec. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM84B1820012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdade200f694cc73d635cba475de540748a4283df9e3e7617375ec3de025fe5d3. 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/QM84B1820013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33307c3fad4f5df6108e32d57704e91d862c2a3f9dc7426d9fb786ef3aeb7365. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM84B1820014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77020b196ce80b3bc7a49e0a46de140c71e76973f425cbff7d0d3edea06836c. 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/GBMCZ0601940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1fe0e1d74114d4061aa00a0e0b9a41fc7f421c1ea1177c8ae4a2bee311aa92. 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/GBMCZ0601942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65054ac4c828031153f843da0e536a109f468b17479d8d1f23e021105a696a93. 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/GBMCZ0601943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684e73fd44dd753ed4eb55d3e69f76886d12a6f14cb89447c171903f4c54a864. 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/GBMCZ0601935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a486af0b60955e4e574476b75c948ec48e41940f62e82c6eb1258aea923384. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMCZ0601938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3205e32e0ff30d1d5a0a4f94fabc573562316c60507ac9f648ef89460ed9a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBMCZ0601633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5267c7b7d1746ef312da506d6df8556add198c2a7eb9d50e04967725118249. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBMCZ0601634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f633c5b83418e583fd09e9ad6e6c6e7adc317bdf27f52687e8ee1c02403ddba. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBMCZ0601788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3da8c09b761ad6df539bce38ceab730292f43053fa430f98c0b55e106e79a. 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/GBMCZ0601799.
Human Being: The Short Story Of The Reed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cd1ba8daaed7e37b740f7af877631a1ede663863c0822a3b948502e2b979d0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMCZ0601138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e696c44cf124a30a1f5b1af9d368b89f4f4c61338d379b00c698f642f837c71. 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/SE5752471830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aeb60606e7c60d71054d890752b44a861f71175f6e70c655eb451614bf9ca2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE5752471831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31af634bd495f74e51c8eb0d1addf77293791cfebf80428a37db3f91b461fe2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5752471832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869fb4060d745de56719423c7620c352bfcf0aa64bdf6c5103b4a8733eeb7665. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5752471833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3864c00514c72b400afd719dffa076b5c0016542c3695709f71380a95ad005. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE5752471834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686153c5a6a6ac347166995f05cd1ef6c5979082bedefc46569c7c23d99b99e8. 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/SE5752401412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd43e905f2693d1a129ab5a763c92412d5d3ec695ba275acb79d21e2f421610. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5752471835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebc3fd2319df4f65a3b080342629785590b978c8c74a85c3c25f45a0ee3b3a8. 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/USUR41331401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab94e66abc42c674b9754948514c32a9497949e8ad844634291a4f8570d40fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUR41331402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c43e54cdaebacfc945caf0fdb12a195affb37098387d0ce7642cf2819e1c482. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUR41331404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55ed997661577cf26bddf82b4d33a652274d3cbb2b8f5ff0c3500e67958268. 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/USUR41331408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2213f06b5361446e8d6d76aa28176efc24b40490112b1b92438be31d8a4410e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBMCZ0601427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e57aa30ea126369614b7766b71f56e30d916f0d022d928aef37975a5523db1. 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/GBMCZ0601971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8651944be05010f280fd857a7c382c29a164f9d8047f90ea9711dd27a7fd97e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM91304828.
Calm the Still Night (feat. Ríoghnach Connolly)