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 0x5ef628ab0aae0ef364c937e5d94bbb885f92266ab6cd3e60a40d5aa8be510254. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89a546ba-6a52-420e-a759-aae0e9f2515b.json and https://artists.proofprofile.net/proofs/artist/89a546ba-6a52-420e-a759-aae0e9f2515b.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 0x6b9e66f5cbe37b616c21e22f72af86adeae496b8b5b9afa63b5753a89c4300a5. 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/US3DF2400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46c4b1cc846bee4f261efa481d2ae8f5f27c9dd9aa115f717d7bd8736262b7a. 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/DEQ022282070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4fab1d86c68c172adcc65f4c9ee0c47d40e0451508565effab2ddb06c882ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2165482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34587d3054a63c3b018627500665e5acd5fabc8708de12f52cb75d547934d0d0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZN882128250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b8394ace7af76be36bc22c9f4acaf1ace2eef57b26a3eb1fe2fcb88ffca766. 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/QZN882128251.
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 0x8d400961244db24240e0528c1b5b2123e92a05ee4b6e26781853113ab7cae0aa. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZN882128252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d22437d211d3aa171b93918a75471e7795566db67571416b51d3ca06872e5. 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/SEYOK2102229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418cd1a99d94104ea70fe6f506e80c48a475b6702eef9ef431a90e8dac5cdf0e. 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/SEYOK2043858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cdd08d7388fbf15b8e1a44206e14f4fe8f991c0ac03ed7db765aaf21ed0eab. 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/SEYOK2043859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52bb29b9a4e8d9ed24fa54707263f0a88829d8293c380f026d76bf75df01c3f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEYOK2043860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438bb0ca648e9664c9a78c0151f984737d0978151d76ee8e5bd841ee26426a35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYOK2034841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc976df3930e3b2c8f36fb1cb445c5d2a7f9c1bbacad3ee5728b9595443ced3. 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/SEYOK2023598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162c18e1e2e85251ab5f32bfa500819a7de29c7ddabf1b03445ac355e09c8c9. 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/SEYOK2015712.
My Cat Wants to Cuddle but I Have to Study
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757c9a452ddbb8f870ec13bad20bba70a40c394037d986965d8d9ecee88cdab. 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/SEYOK2001765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f3e3d7f9d31c036ba08e145297c5a28320d7543497cab2aeed7fe9cda83595. 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/QM3DF2164187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65cb481ec135f6665c17a0eff1f73c0e21135316277790b50bc2f4ccf856baa. 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/QM3DF2166767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c81c7cd24703488ae1f3cfc17e25f58bd60355271bba66eddaa4ad44c3449. 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/QM3DF2166776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8bfb1701fa38f6e85891dbe473a353f54db881294bdc61859e56502b03a202. 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/QM3DF2164192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e2a600835c527db259b3adb84df8e4b6b992b479cf8d0a7814eb8c51bbbdd. 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/QM3DF2166772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe904a8f21fcd3d776965a8c5ed6c3c0df254c1642543b3b6b011a53f922671fd. 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/QM3DF2166781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b213db94e3d13d82d9a48ce472a64eda6a5d87d7fdf667d3bf718a47dec57. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2166793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91a7c0c0d55a5abd20c036388ecd4d6b2cf73c08fd6b681502e381996a9c3d5. 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/QM3DF2166783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac877ab053811379b1b432403ad848b8d70ebc061fab9e70785693df658c5c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM3DF2164194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242d3f1f98a714fd708abfa86d96429a848312ce0ebba325c17ecb52726c5086. 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/QM3DF2164189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3a222f91427bb2360ea82953795d0d0407f1d302d74885c53f60f734d2fc77. 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/QM3DF2166821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060ea86c5f7bb35a4a0f80aef3b859ba394556bacaf9d3f1587507dff5b10d3. 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/QM3DF2166819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861b393f819edce53056a0aaf01833c8dcb542eef37bdeebde25d4709b155c18. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2164186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd9c86b24c9db98760ecca1121a5c57b72284512bf0fda57f09eed962bc2107. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2166824.