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 0xcd9adc05dc0dcc29fc0d856c60881165e7952a4055737f6c55b84e5a9a82929c. 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/79715b69-d3bd-4a93-b6a2-f00fd3571b7e.json and https://artists.proofprofile.net/proofs/artist/79715b69-d3bd-4a93-b6a2-f00fd3571b7e.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 0xc0f25d52806bb5fd0da1c7bd4fffca7d8437df77798dd22ec40929a2527ae471. 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/QZDA41887426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7ad6e7a7c2b46693ae3bf91f7540af02071792522b8c96c5a43403cf7b284. 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/QZDA41887427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0586d8f5cccd38bb1d5d91eea9ca373633ebd990b07f46fb2dd556f9fd695c1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA41887428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd048daea98c54f82cccfd2152dc14e10da37cb3b73e8d5e5ab43f60d595a5e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:58Z), 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/QZDA41887429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82c231851eca0f594600db83a136625aea296117a0d6e02fd4acc6bc3d18b8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZDA41887432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae07c6198f3f3df6629a0bb8c7b941ebbf1f2156388e32a6f0b51bca0ce4b64. 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/QZDA41887433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193debf10509cc2277d50e9259c4dd41e242e5a2a1bd86712aebd3c8475320e. 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/QZK6Q1931714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531fd7125d41ccac2007ecec47d0f4c7d2752feb441f80e206725a46da868ad8. 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/QZK6Q1931720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22177f4c65ca7891045e25bcd9e5768d7315b9a3f5b3ec76b6a4eeffbf86ec1b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6Q1931724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9f7bac5c61d41d64f95401396bfc23439d302570b66539f3f392dfa07476cb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6Q1931725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a76594285c094b45d48f8ab0a1aaeaa709d6db7a4c9535c9dbee9c2dce94f38. 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/TCAGF2252146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ab5dfe22cbb16c430655f03b6b195d34b6ebc58747287eb7c1ef91ad8f81d. 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/TCAGF2252153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb816d2b96ea6c40f2fe778c69d713117429b55c1bca4fc1abebfde81220cab. 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/TCAGF2252155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8397be4019ad9276ab340218733662cc7efd11ec533a125fdb9df3618d9358d6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGF2252157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e255c20dc6f93ce771fbdb9db6cb42f2dd4044f067b2dda088f18e3fd311f0d. 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/QZK6K2394909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d37027d731ffbc7958dc9300c9ccb9b967f19b86318864a7ebd8e2d3613d5. 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/CH6542378864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644f8f12d5c4b8e3c9cdaab3160399505e305f24ce0535c5dc35b4b276461e20. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEQ2455046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceda841bf1c4bf8352f7dc9f8c9e3213473bd3a680edebe27cf01dd867ddfc26. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWQ2595907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9138e89cda4e0f938cca566870917096f4438e9404993da63b3644b33a4f4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F62543130.