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 0x99485825d44658ef68049c83431dd5ed45c6ad8cd3c7c44dbacba2a79e477f1d. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63af5fd-30d8-41fc-a386-1c7f7bfe97c9.json and https://artists.proofprofile.net/proofs/artist/f63af5fd-30d8-41fc-a386-1c7f7bfe97c9.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 0x09498b460d0798ad1c7d5af0b7591b5e67feec170fe65703a3002857287f7dee. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM82128201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b913d956ca5d29cb5be2caa06bf1560c3c4f36076ed2cd9b639ae6a1eab6fc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM82128202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cec371b15b51dd74e9ea9998d448e3a1c66a50961264a803e91e3d7f78aa4e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM82128203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459148079256846ccca7825fe391d6ac454b58099b5829b6cfb70a505cb223d5. 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/USHM82128204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357e1f2960218de1e4c467cd057cf0dc2aa73a2c922e92f1f9e3739ccb60595f. 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/USHM82128205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993f8f5f721bfe7c20a2102361abb1eb9b3399817d594b6dc5c735336b075c3. 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/USHM82128206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423bd241fa24001d7894df2d48799f7aab1b3e2c0aec7451e2419458cab0d6f1. 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/USHM82128207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab31df5ade5314087e14aecff764db3befd69aac99ccb6ccca76026a7cc7781b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM82128208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c3597b625bd92f13a2d8018ff18fce96b995d643ccf65071831b89960d857. 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/USHM82128209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e302ed096262feac08bbd9b1ee2833d50e2ad069958b2df16c1f885bc3f4f8. 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/USHM82128210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2bb8d0b65d244aa50d185f52b09538d23832cc51e623511dc3df5042d63ac. 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/USHM82128211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6a37c7dc44e7671c88ee94ecf42e091ac62411376201f10a2715ea3b4caea7. 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/USHM82128212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aabef0ff8c047f3c3fa10c3887a837452d384e7f128bc7015b9149c9a3ba15. 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/USHM82128213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0b0604e0a8849f75c66ab227434ab04880f765fa0967c2fc3e0a39a1ce794. 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/USHM82128214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cad3c3140c30547cf0fa0b1a4dc01a1af0c4683e6d2abba59addc86bb6e48dc. 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/USHM82128215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ba4c2b1b4a4ce01c5188a9785a0a16252b8b7d465e6c83f5ffce5572f69a7c. 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/USHM82128216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d32c83aae8a03a6c395ee7b449e23865e402caeab6726c0e02972abe8d0def. 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/USHM82128217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddbb55271856690e77ffa98524928b612d9ee81abdebf4bc1b06f03a29a8394. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM82128218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb3d63b1d2e5193550f3242df841e1d11a784b11fd3748ea2c41efd24383e3a. 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/USHM82128219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c07ceac055b5d48651a36a5c0cff0b35ece6e01d9cfca4274f357e5d9d2f5. 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/USHM82128220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415b02e111d255f4341de81debf4667fdcee4e129de7784476ed2f627a4335a. 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/TZA1X2300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7187aeb4a1c6bf31aa8cc4e2e565ee76f2f013b62281d24f1e0b3314e9e96e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TZA1X2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561b5d0a54ca18cc7a576f643b1ffa13cac4d6c3cb80847e257f7b785cb1e1c0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TZA1X2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf505c6509f35507bbb092e06b0ebdc1b910084c9954faa93666b08cfb6ea44a4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TZA1X2100801.