La Bourse (The Purse) is a short story by the French novelist Honoré de Balzac. It was published in 1832 by Mame-Delaunay as one of the Scènes de la vie privée (Scenes of Private Life) in La Comédie h
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 0x3a064301b24778f8c4933bf379b3f67958cb889d5b1c6cc2ef186e8c9501af45. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a29dc8ed-875e-450e-8e6c-ad158a667ebf.json and https://artists.proofprofile.net/proofs/artist/a29dc8ed-875e-450e-8e6c-ad158a667ebf.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 0xce5f1d4e812b1d8cc6e895349649fe1ad3710e300d027f2fa34b21c2e3546f16. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAGL2216308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aac461c3924155b43767b22e23b37180f5f344c7279ba96ea803b50f25f694. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:28Z), 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/TCAGQ2253407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ff7e0b3a56521641dc26a456838a0b4c5cd012959f2139550b15c3623aaa1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAGR2279262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf967f8c592663c5cc486e06be32cb963e6c3a08b0ed922813604ddd6d58465. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:16Z), 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/TCAHP2311199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124d6d7a19ee5ee895107ab0bbfaf494e6f4fe6a2959b28210f7ec2df843d7f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHP2311211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1275f2f38ad2d6c27d8d76286c0fa9119874e2c1d2551f2804935b719d629d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:00:57Z), 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/TCAHP2311218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a7cfb82cc37786352c5e76b91c224a1a4042043f17d98396723a587684893. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHP2311230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b2c83b1b1c899eb7f4287997d54048faf9cd6f85d923c01838c0093e20ab20. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAID2438534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68156a1e7a622b89e1165e9a858bfe401a5047600d56fbf3ddf65a1a26e07f. 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/TCAID2438602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d664a5e52e9269a8c9cf4c78fba5a547bd17ed2dcd2880a9c5a6d27368e56b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:46Z), 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/TCAID2438678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816138994f6f7015a23f8d27ecf8937ee699bc12a5c74253f7295a40fdbfc7fd. 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/TCAJG2584355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6be436d24e916516747a7478fab0a72eea9227be11088e3ad17c4e3209fc3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJK2581941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbe18702d2e4c04a258b8302b975cff8dab89508790b578483e18fb2dff5e52. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:14Z), 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/TCAJM2586942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6be436d24e916516747a7478fab0a72eea9227be11088e3ad17c4e3209fc3. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJK2581941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34ec5b94547ff80d720880460deb76490379507ff532c8678c7d8c730adf38. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJL2560024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba8939bc16987731fe30cccc4c75d675eb3b23e5757c9ab0032c9a86f0634ab. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJM2587013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a36a4012c926f31725cd403e420986f1bb2f25e11bc7669d0d645baa892ad6c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJM2587030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc3da6961d07356277f9915c7b206ef0947bb00ae48b80ac0faeb46521097c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:25Z), 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/TCAJM2587039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816138994f6f7015a23f8d27ecf8937ee699bc12a5c74253f7295a40fdbfc7fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJG2584355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615fdf58cbe581a229c974604226109416f2e1f8e1e50254ca044560870aa13a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJM2587083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8d774554f328c64cf91dc9e94ebcdfec3d345ee5cbbcba98a37b1589b8736f. 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/QZWFK2377109.