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 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 0x40fc33fc35f163ffa60ff61c09e330dd1a9b03ab9f4fbd3c84c0d5449594e33f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2babd70c-f561-46d5-a9e2-896e28d6f8b8.json and https://artists.proofprofile.net/proofs/artist/2babd70c-f561-46d5-a9e2-896e28d6f8b8.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 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 0x0102581baafb685fe52b66af8c75bcba345ea2f0207e8df4402fdebf4c2c15cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UYB282373007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8479b2f6970924e68227257534b2e12033456981fa4f92270c5e83f42bbd3a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5AB2459246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404bccd8519ea6a4a0f3288dd40f068f8f32dfbff8d2914cddec94b4da9d15f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF102200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e8834c48f5c4f6447943acaa6b50c96dd82567e06922d0bd411bd98fc2d11e. 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/QMDA72266063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c126e33760684f9f17f69bb2c2c60d867eae55b1f0f4b8546b336287ba83b31. 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/QZGLS2292177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb049b50a9b7b2ef229ea838e4b4cf1dda7fe4d8d95b1cd3d069351a332674ba9. 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/QZNJZ2127459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd956eb724d06d55ff88f364a71170b9a843129bf8deebd143923eb35a0bec39. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMFMF2111994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f4adecdf201dd495f505671306e37615a2891dab00365e51c32465a97c2b0. 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/QMFME2181889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716556c1ec49390ab832a44579f760828c55693a9b30f3a407b0dfa868484259. 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/QMFME2131616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee119077f7c908e84e96908ffc7eb7a8a03fb6e71054443b23b611c1965502d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6P42107421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c78d3645e4ddc0cb4aab103f49c77df8548bf3739bba94d2fdc1461b20c54d. 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/QM4TX2191122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6439b911cd493ba948b3a2183d26306db5e26f56634424819ce56f838e1c669d. 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/QZNJX2092916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd900f9e88fd314cb0122fe09e90013de0ad56ed31decf8c6e81b95e4de48b0. 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/QZNJX2018200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fff30bd8e2f52efa27d402f90eaf5d8531a276527a3ee28b438a78eda04662. 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/QM4TX2378351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90992e0ed9de5387cfff5ff9bab747960b82bc8a671b82e19c0e2f3557824d8a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QM4TX2378352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3191819db1dba69f512636b43bc89f0d18a760c7cb19e002caee13af2676792. 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/QM4TX2378353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8811ff282cb6472b643a84877a37489b533e06fd2802ac30340434c7a8953. 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/QM4TX2378354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e14b03d9ce9ac8542d7891b80b343076c38d1bd011658e0829eb40ffbdb775b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJV2223903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d9d20c2e676e35c27aa6a75fbcf63ff351479ddb511bfa5651fd3e81e30b5. 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/QM4TX2378356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823bf0a1f6f1394ff673b1d1632cdb638f38c0a95d2aae94d0d26d642cfe7e2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX2378357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e77b431de3bb267d4d164641653296437d4da0ae17d3f208c7405714fd0a7. 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/SGB502537395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924c120979783911a497eb4e7d449d6774d663ec1cb8f77cbacfae39271a3485. 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/SGB502536886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e17cf9ad738d8ceb5ff26c64d81294236aafd982d1af6b23f7b07a3936ecd1c. 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/SGB502569825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac2a1407b8d074b9aae6b94d45b57de11daf5af0e8a68be063feb9f4ebe242. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SGB502553709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473e6af6fc4c57974bf4682954d91ba76f611a58f69c5a8b0f4f3c68a23eb1cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SGB502531216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850fd00c3863b987c550dac3826ac60bcb3d2ebb7dd41b1fa96887443c46e04. 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/GXD7V2438110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ccc8c316e8b0d02402e3c2047a1e97deed9cffab2a4e13e05c33d29489759. 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/GXD7V2494340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71eb6d2dfb96409b2350645d4b9a8f27405d94b94ce040d5d054f67362149ed. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GXD7V2450425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18362b6de1f08e23d4783aa139d4b4d81726e71bf59f1f4a9ac8000ba71de82. 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/GXD7V2412209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d43d07a999d7d23342f1db8b5a3fe0bc7eeef9241f06d505dc1d170baed7aa. 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/GXD7V2443218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37603a09f133a19b2cc874cb4c823c3961435fc22b2f1b46dc496b759929459f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GXBAV2242066.