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 0x3a0ccb8c1e02c3a80f004e8290dbcd2e0daaee33b52a3ceadca767745d21553d. 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/ac3babda-9219-472e-83fb-0b6cf687460a.json and https://artists.proofprofile.net/proofs/artist/ac3babda-9219-472e-83fb-0b6cf687460a.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 0x7cac9c0df6236c39255883958d03c6b2ed4de8fbf76a54523240e614b8bfd250. 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/CH6542440205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc95c1293c409f703575529fabf62add12bc901c9e40f427292f03ce4d5f58. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542424307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90ee18171e700f67f0508267355aa9b9b6c1c58600193eae06ac895f216efb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542408490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e685ad02dccc53a6f76b537a1b948057c916b57853ca6902f01453b8328e0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542387891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b13777ef7049c983b7aeb5c38ad2f2f62058b9ece9a35d4dcd3e10a04cd4c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:31Z), 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/CH6542379961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fb3005b5cb7e75f95c2a0573855a1ff0664ef9be52c05eb0839655e75e9597. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:16Z), 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/CH6542367154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deccd25db2900d6f5a38a9959d3b5c6cff6195125a288481ca07e8ba850db75. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6542357082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993f7b74d81539b5c096e9da495d1f972f7de218c91e277486f043ee1c9f20af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542350283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f958b478ee4e390c3f9b24fbb83440dc9d053e711ef980d5ff443e42c718c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542342138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d5fadf642ead66c4a8a05dfbfe9b9b148d31a47e469211d6d0e00db6226be4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542344982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162670a3c48bbdc3961fc9fd4eabb44f0ae9365ec81a4628dbd252c9f26ad7e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32303926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3372aae583a44b125fc581054da2c9b11eb6a3785196c58ce37c0d88fba5c68d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:23:15Z), 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/CH6542305914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c78aa121a40bb7d652df3935cab2336007a7a6c1c79362a0057f67ca0749e5. 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/QZTBA2222381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822ecb90039dd08841f0023d9ba1ca76043a5e1098008436f48260682c55c1a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542268127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe426a30445777acd3f0cd9c807b9c7a4e85cbad105af7a34cf49d3ea2f47cd42. 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/CH6542263563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6c44694e4528cb10ad656446ec0fdb8edd5924e01eeda172b78349eafad51d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542259131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a72adec7538fe3e6eb2008b187b93b245730a209272aec954b55ea3c8a9481. 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/CH6542251559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b13ac68ff3e52ea4cae8b68772d793501cfc8cf758838c34f95c027c9f07f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542239220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2af2e22ccb48aa9396e2510bd840868565ebc1465fe41f5adc5ef8dcd2750e. 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/CH6542233877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f40dfa1604dd63475bd5958564d748d710ff87c83f3f080803f5c9389e258b. 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/CH6542217638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2c05c5accca378c26a3e1121186fc1f6ab8056d7d7e19d7da890fc2692bb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542213353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679a5fbded87797ece9b5db47ce32e336358f2be5daf66fa6ec24e7372ffc35. 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/CH6541690617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20b8b24deb70e762f937d33d92ffffcdda341485a676e38ba5118e01d655245. 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/GX5MY2117095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4aa17eeeacddf95006e75041f4316a698419cf65a24736905f8e956bae80a6. 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/GX5MX2134223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805cf6a66a069d0f37b3a5211509911ab5f28248ea8cdb9ad5295ee9756f4f0f. 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/QZNWT2192154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4622038c2eeafe8989872f0bb3d9b29ca3ef43451cfc0402e29d5cd35ee894. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU0011064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc20cbcca8fd7f8643e82a9a1c4c0d1c9cbd8d1e72c227a6290d83b59a42a4. 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/GBSMU9960574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6c0be2536a26ea33329e22cdcd4fd291d7bd3e9a717e03d0bacf11f28ca853. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNC2150115.