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 0xc78649deb1118d1318c2b277011b4d05d28419f69bbcaf4c26ea27757cd184ef. 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/196bad17-3b55-4f6d-b9f4-da83f63f336e.json and https://artists.proofprofile.net/proofs/artist/196bad17-3b55-4f6d-b9f4-da83f63f336e.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 0xfcbb6cc4600311c5eda5cdfec0cdfa9b388e1499d0a097a3ce6bfce6e8ba3c7b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:27:34Z), 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/BXIV82225483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec65ca788d217f3d8cb68ebffe67a1b9dcb833dabda2b8c13c51a8eb1e73bd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BCKKP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd529be9549d6d7bed0d20e2e783e0fff7076d5a974665b2a5b8d6fcce3c37a23. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/BCKKP2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae07eac888f32e06a74e27b62242297c0774288566ff961c5b0226f5b80d5d1c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BCKKP2300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b72ba2101ec77104ded585a7bfd22c363fb9ad7f239a33f241f3865ca47c9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BCKKP2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a8f444258d8ae000c6538dc85939ba7697333e0f07fbca3bd79ac477671cfd. 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/BCKKP2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a478ea176bb593c094642e7b4dd6b71a1a54da40f302b329e8f1468adabe63. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BCKKP2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5a6942b8da1df5a257687c762a87e28da792771f25ccd4746dedd6f4f5466d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWV32466464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b372a5d299b646e6ffed9c756228af3d5bb9e0928bdc3eb0ac91fd339654241. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BCKKP2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f6fbbdb7719582e90e1c0d1caab5923e0bc8cfea52c5375636f6f570e3b4e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:07Z), 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/BCKKP2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7b45508433c1ff3710d5c38f0d6b983ce21b711de8b224780bdfa56a01b2f. 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/BCKKP2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a533961a1294e57cf8b5df5750e1ff4c692905a59738fa2261439e5ee6e28f6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BCKKP2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c37111c53d611f80f33dd3d4e5a0bbd2bcab7ac5d4839888594727e71d7e93. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX56X2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbedf0b521bc33aecb4c34003424d7007dfa47cec0d3d6524e2f71003c7c40aa. 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/GXBAV2563561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be9554f3cf364026d94eca71ed778b743053e24dfbdca26efa7edadb949544. 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/BRUM72202218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bb81a4be7dffd0cdc1b5eb7e11d11cf2d8127dacf4282f5dafcf568bb74df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRUM72202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bb0d70e0eea14a2d7b2a5b6401cba77f2e79827b72e1587e0e8e662f658306. 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/BCKKP2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c73f9364d5c979a56e0a2850db2aaa2a594b997161c6b34c69798391b2c7d83. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SGB502352622.
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