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 0xbfc1e3dc8b1af47a96c440d233522cd3c722be1495d9b9595bd51afa6fecbbf3. 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/b45d7cb1-4afa-4805-a4fa-bd9667ee1177.json and https://artists.proofprofile.net/proofs/artist/b45d7cb1-4afa-4805-a4fa-bd9667ee1177.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 0x1d5e88a55f97056c2ce5d52f4f7a2096b4d4e98fe2508681a34e617ecdc9a093. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:39Z), 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/USHM20501586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eca5d73d8bb88f2b6604697350fb0ae21108966e6f2c9a1506b0153936a1af5. 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/USHM20501587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd2e7658b95bbba390bd9f797855bcb8770a892abc6fd45dcc0df1f8bcc18e7. 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/USHM20501588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff31da1d9db27a901fa8851de9b821fb9e2c7cdc662fb7718c9d444a23d112. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:56Z), 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/USHM20501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa84fb35812303b4c435efcfa6f6363993ae57180d6326cfe120e59003e228b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM20501589.
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 0xa8c02f923697ac192fb3a43d0324d19fb3648c50fc9fec038d344c4ca3da84f7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM20501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58227f56d1710ddedb08a84d411f22ee47c09a29d245a094bc496f15aac558. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USHM20501592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4345575a9a0acffee02c3c088ddbc41aae5d6466064db81e9ef0850118d63e3. 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/USHM20501593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571a9de1c2d6a6535f3377835920ed6c7324f9792955abb27cfb518da91bf5ef. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USHM20501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19849f5526edd2a094a8419cf05d8a41dac2a7e652a41ab5ab611f353fc8abb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM20501595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29caf4182f26967959cbae2df4f00d197d900a2af0a85ea6fabba1c77d395c51. 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/USHM20437257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af6a1441b8353ee953c9ebe79bce892128d188e9649b00b48831877cd4c225b. 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/USHM20437258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522b8aef11b908d6e5a0ccef70a7b6080d40d6c9bfe2ead6d968145d2d4fc168. 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/USHM20437259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06404e5ee1093c94accc65b91a4059d0956bc80bc3e68a102e21d571afb1fe1. 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/USHM20437260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a46675ce81e0bbb248933e1c9dfd12d5b2d452e2d7fec76ff2ea3ea4f7c7cb7. 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/USHM20437261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b8c3667a90c250628bc94f59ba105d9d6581e4c76bbda6450eb18519dce9d. 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/USHM20437262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2a6e1978d6ac5d023eff06e55e1b380d86bdd14bdf0b831dff3843a55dfc20. 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/USHM20437263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54659921a3fe62fb5a2a60d1aba5a3959026a84802e19a8d027cf8ce4f3643ec. 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/USHM20437264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee07cf8f5421e7054f9906c5781e9c7239771d3c343bf3cb22b921fd907f5f2. 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/USHM20437265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b01f787c6906823aa892b7660a3082bb26f090756e7fad70052ca7415987cc. 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/USHM20437266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfeab4b520077d9c9c33e12e50a310365011f301810899bbbd721bb3f67f82f. 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/USHM20437267.