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 0x1d7dea909d2eeb3665c7e711b697a05efa27190380a2bb9ec838b33a71dfe3e4. 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/b223a0b0-b949-4d93-805a-658c707f8590.json and https://artists.proofprofile.net/proofs/artist/b223a0b0-b949-4d93-805a-658c707f8590.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 0xecb4edcb0d3c71be4ca711d4ecd09ed59fc209c51c8c4940caff5874c05f1dfa. 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/QZFZ72267991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83075119d12db9180f66e7173ae4e53388877de8baa73369e40141e20f742173. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZMEP2207615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb91e98cfe27c36963c4e89bb201dcdbb030f02ade1a2217465fa6e82000330a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA62394670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a2649d3f33318349388e9f0631c289d9e6b946e6e2174d2969981e2639e4e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWW2372186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f4f8fc64782bd1cf5f22fda3ce48a2ab3e75c8b4ca17d7c81ad9b79d19eda. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:44Z), 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/QZNWW2372187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef049745c24e47505794806f3259783973c7ae5ac031cda2032a1c205b4be55. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNWW2372189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0e2af306da410e280d3cfcee0834cb820f3b22ed4fb39deb1838f03b4e77d. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZWFE2326527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7add359e6525e134409520bf023a4a0c8f3c84997f523c75dc0ef74df014a554. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:01Z), 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/QZWFK2366963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35e8560eb55f541fa11ab657f60c241906b6f7a29cc9593342d0dad511b26b. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:26Z), 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/QZK6G2453881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa575d8d200df392329a9d12a9db2c17b7f615ee16ae248ead830457f41d9df79. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAX2466501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dbdc64c5f5ed39a751b83314c24e19058fd09ff4cbdfa2daf5951b97ba24ea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAX2466502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e19dd4b62dfa28923ba99d2ad1bb9038acaa9c5aee74c3e28582d423d87421. 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/QZTAX2466505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4199928a62bd2c4f42e7b4c369b98b06a3dd428bf3829061b4571a18b30486b. 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/QZWFL2575716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497af48b3ff8090f4f0e73bb40f049a92aebb629c817bab66606d9a682b131b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2575717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e19b4f0226f1c2f8603507423ad870d7be0c6ab2cb784eb1a5580867417e22. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFL2575718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307e27be93c1028c47f7d761c9dfd76851af5745c257622fb6bd1091ad8c7450. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFL2575720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0dcffb1bd4c4c592089c4872db14e7eba74c87aa072edafd0d9deb3ac781f1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:29Z), 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/QZWFL2575721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39588f514b095e640ae0dc9fa84b37ac330ce683766df63599c463ed980f02e6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:26Z), 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/QZWFL2575722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7a880ef555d6879de45f2b9628f7d5802d8d2128abec3b62c874208f1b9fb4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFL2575723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2448ec2334556dcebe2e49f3c0f87b3c1aab959277b15e6c4cb82728528cd0fb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2575724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1cbba15435d0c2b7a9cdf3edb792e316c79984e6c05a52ad75f1081ca92b1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:41:14Z), 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/QZWFL2575725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa4c1b0ebb2c9db92589365c0be11e1aadd9962a211f4920fe80161bbe0aab. 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/QZTAZ2490172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451b66f04f1648d46d760498ff7b802f2087fc38d16830b5c45acc0ffb6dd196. 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/QT2VB2420998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139d4223cf5bbac70762f1ecde4470905034504779432051edb90a3439463d23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ62075284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120d04d38d7da85d39bbb4da969beaf2f0d927a4b09c725712621c1a0f878a3. 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/AUMVE2449418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d501d25eaf48904456d5efb8530db29df3913b30f4d0d08ac92bb4ca3f846. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHN32063285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3f687b1e6171ece09f4ec179be061a9eace733b5f839220636b0a3f7e8b934. 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/SE6XY2293754.
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