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 0x1681e0e0d1a07963d2d4a8360d04cbd7c0669cdfb051ac49cd0a8f5882c26f99. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/840255ad-4190-4a68-b859-7dc18302479b.json and https://artists.proofprofile.net/proofs/artist/840255ad-4190-4a68-b859-7dc18302479b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Michelly Rodrigues & Banda Flor da Paixão 2019
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 0x430ddf1a74e76d07ae4c6269be7549f05c8cc8893f6ce5ce9800317c7d96f77a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZEQU1905546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e7c33c302374756c69a8ddb8f07441371f7e17195ad629c830e7569059df8. 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/QZEQU1905550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533aae5d08f6ff18564999f2a445c0ea971004a5c039051010553d51bfd6c5c8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:43Z), 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/QZEQU1905557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcff561b507816ff403baebbb820ffb3baea8a93484a162af5e08a1d9d64945. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:29Z), 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/QZEQU1905566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec568800cf93be2b24d8b937d4c4830bfa467d034294795cac1e5250c28b1e56. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZEQU1905575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25930cfbd1e98310d140742d03b65b039a4792498375d4e4ba45ebe866175db2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZEQU1905580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6032933929c9e25df3fdf7fc7b929b9b9d755f50a0b38f0b969f6a503ec23e75. 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/QZEQU1905582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d8184bb5e770ea99ca0ee54452855a6d66d06c685af1a3fe85d080d0dbf174. 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/QZEQU1905589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493bd0964c0586988409a431844e340923df7d6ca661c89d5f2cbfb76198e66. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZEQU1905510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7798ac759e1d9880c145bcb828ddb99779a84aaf3a684de49dbad03de5341fde. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZEQU1905511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66859e0582d501a3aef42d28f63121375d2913524cf6374a6b4ce37c550fa51b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZEQU1905513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f860229b5e7a5df30facb999bc614b9012ef93e1bcadd57711b578fad81842. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:16Z), 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/QZEQU1906291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c90c8c0e321885fbb0b2002220a87716f838457a60a17d0f3a36a6b7612ba. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZEQU1906292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44639ae756b9f574e135e84aa14beb76617908c268333795a60d0c7e3b9be1ee. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZEQU1906293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c960031d7bdb5259921424c3b3ae227e9ee2b956d6ea6cc2daae72971a6664. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:52:39Z), 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/QZEQU2025106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0904b41f240e839e2436a48f3f7ea0b9fcbd51acba04ced0d42cd32722722fc. 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/QZEQU2025110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bf5b75490a822c1aa9fbd340a1964f8e8d08802ec2a2888fe688e6440c7982. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:51:53Z), 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/QZEQU2027658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e187e41bf7899456534143d05bfdaa715987080fc63f7bb072aeafb2a37fd2e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZEQU2027664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6736d25e84bbe530879229be7ad0baca23eecb7f67efe7bcb26a9a6ce95dc95b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX8ZA2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c506809e371e2f7688ff6178e108472303fc41f9adab99e2df45d16ac5077. 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/BX8ZA2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60fa2b0c48ac18d5aaf1a634357769ff63319d6765ce46a9ea65291c6725ebb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA112434257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d60fe0978d823780e8122d55b979ac1846f406785036ee8158a43f4fd888f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ESA112453935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fed763c02af4022ac18c632a79a3dd058162f7d2a4e3f0c2315551f2a16609. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ESA112453936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18de47fc90cdcc8b46d54aaa628f2016a51427a354f1bf514f01f3b19075b417. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ESA112453943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57f8171044a769151a98cccd288e2d9149e6e239d53351e29a243478a4611a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:39:26Z), 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/ESA112453944.