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 0x52501eba3ca8ce5f5929353a994b82e969fc49a6e464167c1f9026004408f0d4. 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/0daf40a5-b6e8-42fd-8940-6bb5d6c39d0d.json and https://artists.proofprofile.net/proofs/artist/0daf40a5-b6e8-42fd-8940-6bb5d6c39d0d.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 0x27912ced443f1dcc14a3853dea84ef177f379e6a15e2f8fb3b9f51e56e6abff3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCADQ1835274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de8306a7981d3be6bdcb08668940ae8d3cb374adedf99dbb80d059c63e7dc0d. 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/TCAEL1983618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51935847f23d499c46fa3e8b48ff5b9a640e4b26b28e57893bed2cd6bc58ab. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAEL1983621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b57607f242b5c261c9c5949c4663829e5d104c6eb7ad43e939c78ed146593. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAEP2077402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6cd9fd45f6755180e9d3b4abc572a39de4501274bc68118b1e83b20fecc238. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAER2049911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f4884421a3bd4f117c03e3eacbb8dae466866302c5ad758712e612c792bc4. 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/TCAER2049914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e0b0b1acf535690f4670551fcb2e4080ef7827dfdf4aaee6d07cd49fc31ef. 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/TCAER2049916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea7ca110832e2e1f20128532959f6f5bb3b83b9fd74c3e9520fc778dd0f1015. 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/TCAET2057599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3024e0dff550aea07fff879102fa6fda9c22c49fa29b979203ea381619cb91e1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAER2049907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1417f018f605944c5be71440027e9086c60b9a8b1d6c0e702d9955b0dc5f79. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAER2049906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ee5d41a10829c8e405c8a5ec6412b176a9a274e1f4cd5c2a709601d9c6b597. 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/TCAFE2068297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb5ce1550ae71ceecec2dc7d257259b97a65010c3a64b90f7c599b299d31a08. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAFE2067626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf410bffcd4384f7526227b7c8526d29b29aedbfbe961bc06ec54a81043655bf2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFE2068285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a3faba23553a98a851e3cd37c7a955db986d84b169dbb4ebf0b568ffa1b3b. 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/TCAFG2016937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d1034d30d31f55caefd20df2a82217b8be689d96e6168f68e38de625fc3a1e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFT2127019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341635e9d07bbb6b23a641c5ca223682d3185779558e054e3f68a7f18213c23f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAGB2222193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d7d80519a2fc6ca8efcd55cce6fe16308e626a313e8444cb67e27b8ebbc59. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAGB2222204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016990843b9ec6a5f846285516cebf31c846c19deb59973a3690c4989b2756e. 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/TCAGB2222224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7318407d8e2c309c8d5d10b1b887ab9f9eeecba88e0d42c44883bad2bd5e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAGB2222414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caaef706309e327396e911f815777c1491e96b7751b8f5048a92710e2e7457b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGB2222420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81225b88af59fce90680c451da87726faeade355a0e9021423d85669d0607a4b. 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/TCAGB2222439.
Holdin' on to You (Acoustic)[Live at Shock City Studios]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c179b7be3c6ddd81aad0bbbc48030eed581b920fd9930b3d4c27bacadcc9022. 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/QZW9L2319626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201bbd4ab32825ba8e7a17d178bc16e5639e4258747b3ef85c415bea614b5830. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62450724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb208c01371fdaf614bd556212f77a00bf098303b201373de00c01dee0f2ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ62450725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b329b83ba1acec97082b53dab65c62f5a879df9300d964fa51c0475f20638e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGT2351197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c179b7be3c6ddd81aad0bbbc48030eed581b920fd9930b3d4c27bacadcc9022. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2319626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378b7859963e5b8b0763cc4d9c8203dc23b91126e41490cfb74c477a72a8d185. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2427464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf87e2906eb1e3866ef64ed7d1f4f95cceaab2462b88bbe4e0d4a2951bd8e78b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2321173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f10e34218907e3e3431a4148ea1b2515ac7221b346a4f9b2724c03917ac795. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62450727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5586282a928d85929c870d692cecb139f38cb7efe45a3a9603bc054ce183b437. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92395421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71228e8fca7a98af9985cee3d49a21b13b2a01b22bb4f49f99e94aeff62e8a70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62450728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f88657ecc18cc0c7fe28352b3aa74a8239bb9da325f9194e68af0b737f4993. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62450729.