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 0xc8571579dcc723eb92d61a2de4e8c50edcf070be4ab70a8b5bbd51d13057d631. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d9b297c-03e1-4157-a314-de647a661d58.json and https://artists.proofprofile.net/proofs/artist/6d9b297c-03e1-4157-a314-de647a661d58.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 0xddfcc86c451b9ed40942ab2f3a28c41f0d43650f61271312853a349c8730428d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2087820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e380221f3c436e6dcfd579d22f01dddcc99838d9c4720adf9d4e29297cf50ad. 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/QZKDK2011912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2e44f8cf42c6da959fab28be5c81a2271359a9bcb0e581e70ddcbca08cc2ac. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USLZJ2438576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345753bfba02d609c9fe8a82f31860c910f84582eb928d0fb2f911d33930d058. 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/QZWDE2475714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a412060555585d13ba6d5cdc6f60b2b3ba64f87155ed45fba7727c161d8571. 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/QZWDE2475718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698f09197dcf5b9257224cb5f514a737600f12a2800e5c3d35c3f8c73f2e47b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWDE2475719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f3d580ff7e25aad9b4e17535ec1b22ca8c3bbaf2d0ee9a418b399a43f2efe8. 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/QZWDE2475729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd059903b4f7587d09cb3e8e38998943000941b16588e902ea08788e7dab91343. 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/QZWDE2475788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83ebad41ce928d311dd28115c6fd866140e2695f0bb7defeb178b2cba49cf54. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZWDE2475747.
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 0xf3456c4ac24a9e6052dc2069d0d1b64ecf0099dbfefd59ea6e44c638b5ac41f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWDE2475752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe0c4da1201fb35c22bbe7d0790d7c0cce7bb61391ef2075ba30264cfc7a18. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWDE2475798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecaead01f73735a7d2271f6ecca208f0f6054780895414344d967c2cb3f211. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB92284105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99614f6430ee3afc44da6688aa4c8d7d62fa682c7d68fb597ec1e09b696c7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62470461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa29d7feb7c31afa9482a9acade45c0a5d33711e904fcdf6d734cbcc24a31c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLR2313326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41ab4d5c6fe9dd5ff76297c706b5afa54fab91f222db3cd65c68d7142d9bc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2374851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852b338d7fba74157a94a0353c6977d89140ab8deb0fb6120e0053cf629db940. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2272434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a4e26a9c72e4e21b7a11618a23a6df6b32dd53d99e90f282d317eb8a77fdf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:23Z), 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/QZK6G2272433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b29b013a03bab79ded94dd66f121d63ab4ab11f7cb07a707ace6cdf20042689. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6G2272431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9da7dab647d9d3b106595c97b478382db8a063255795f9aa36399b89f14113. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6G2272432.