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 0x4e4ceb4d4e8b657f35036e6df5a8222c9421d2d54cbf70b86a8d9d8352ea2688. 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/7a12b474-a46c-4d64-ba69-602ff2e8bd4a.json and https://artists.proofprofile.net/proofs/artist/7a12b474-a46c-4d64-ba69-602ff2e8bd4a.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 0x29338fdeb41bb1479875e648e0880cda62fef09eb1debaa0b0d78e109ecd702b. 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/TCAGK2286112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30225e58df01adca23f031209bdcc0613b9d02971afa09d949be5120a8210889. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:16:52Z), 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/TCAGK2286140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c443a927b020977c817dc553d8edec1abb05752ea15d4d74d20f772b28b85. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAGK2286145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f34e93dfc44b556b3f755f688530494bf761bdca694a97fc0bce0bd80d5db. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAGK2286148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00c26da6ab3df119cd1b0d07d2d60d313dbbe79e7df0086e148ecf3451ef62b. 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/TCAGK2286151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bf18a87f24b8a8ff5f6c53c234ac3c4482c7976d0be800ce7b3e6b62d3aeab. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:09Z), 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/TCAGK2286667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd2780609ddbacc795d3940888ef868b85c7c6ea432f55467f4b7188e328974. 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/TCAGK2286167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5907f9130669116b97f541d9ef529b23518e6a60f13727d1f049876c89c0fcd. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:54Z), 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/TCAGK2287567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05e5c7cbc66aadaf2534c92f6c62474a5843017d8558a2ae4fda95525555a4. 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/TCAGK2287582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807b3cdc3ef1b53e7ce3ff5242bfb8b4f2d51146aaccc12279d8da345efde4c3. 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/TCAGK2287618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b3135892d567a902a43c7f6eb4b5cf7c82f51b88847d2539414b4e190d569. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGK2287680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4487f2bd6e52e2c93abb896871a2e608099f2bb2dcafe7b0052cdc841f44b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAGK2287694.