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 0x5f638bd9f68f768758b4a146c3317cea488785420a6af34c199063c088f23889. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebdf2a60-bcd1-44e8-9367-ec790abfeeae.json and https://artists.proofprofile.net/proofs/artist/ebdf2a60-bcd1-44e8-9367-ec790abfeeae.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 0x87ab13600777d07091ec3367dbca7a508dad7cbc56ab1668438bb120da4453d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W11514230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8a3ac2e4ac958a0bb348986f4f5038241b3005402a48103c789d9ad5f2ec97. 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/DENI12100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db3f5c45915decb5af788d2d4e7f58dccf20540492b21e68966c6586b31537. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMDA62454796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2725883bf47fdffe47ed3629e1da9264558600d0c5bad7628671daba10d2e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TW2575457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a3555c8a481e45fd4943f07d7df5cc15e357325bf761e1d6c9956bf42064e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TW2575458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd547299d0fb40b2192afd01a0cb837b8256a8c3eeff1603f8e2bc1fa8d191b87. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2575463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2725883bf47fdffe47ed3629e1da9264558600d0c5bad7628671daba10d2e4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW2575457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a3555c8a481e45fd4943f07d7df5cc15e357325bf761e1d6c9956bf42064e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TW2575458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc022f2741145aa9394acfc5a789aee02bac44c979e35c8969cd65431ac156. 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/QM4TW2575459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399792f1bc12470e66224684ac01710697135930c649922f7f245dda60ccb1ab. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM4TW2575460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce3a2e862b72ca08249784d74150ae518b7443c9de236483ec7c48dc388373. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:17Z), 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/QM4TW2575461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd320ccb8fcf2408e9558a31f9118737f57ffefaea4eb3af1a0cd59310a1a0f0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:22:41Z), 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/QM4TW2575462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db3f5c45915decb5af788d2d4e7f58dccf20540492b21e68966c6586b31537. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMDA62454796.