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 0x9f2e75738ae9d375944dc9bb7ad4500ad2b378de1fdaa6f75687ac5c8bd97d6d. 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/28dcbb6d-d650-49e2-b636-91b541512b36.json and https://artists.proofprofile.net/proofs/artist/28dcbb6d-d650-49e2-b636-91b541512b36.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 0x45c6d1c8fe28a895b7940da01300f62949c8fe209fcb378e752f0d1fc3ffe34e. 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/NOPM72301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868db93c04120c6c102c6f8bca14decb1dd827e26c57562f90938f8ecf97cf95. 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/NO2DY2300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96441956f037563d63741d784297fcc6cda31e3393d0582164d063ccdc137c44. 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/NOUM72300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5536d635a4d9c3c7aca39cc8d22a901bfef5fa8e6d2e07b43f656e5017200567. 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/NO2DY2300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4d94a90ed71703d0628c7ccccdca70b9f8dc00dee7dc2ba3f544c353d0ddb5. 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/NO2DY2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87dba09271790ec1e581c79ce3f0f657e488c935691272d1463cb2797701a7. 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/NOPM72301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b2ab82b999fcdd7b712cae12d2086c58af812dafb6a815fc68c7cbf21648b8. 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/NOPM72201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8975407a94f428bd771f545e6a0eb6b1bc1c9aba0ab9462329ccfd9f680244e. 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/NOPM72201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f7c4221b1e679d6bc2fdcd0758923f76418f44417001be4531e5f8aad6646a. 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/NOPM72201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a6d808ac43989a5d6f05bf7e487df0f805936dceb28276f0464510e03e0e98. 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/TCAFU2158112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0e23b8949d3a1b0775f3e8d9d5ff67780e34461bc8084555fc3660d7fe083a. 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/QZK6K2137935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bbaae8c19789fde84b087f5d2cf6f2b16df9df6ea9b5779f790d591ebebce9. 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/QZK6Q2185875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776c490a392d1c74c17ecf434715eb7376bec31e58c4f7e020e1bf38ba981f7a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZK6Q2185876.
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 0x26fd586f76041f424368e5966d6c1a71f212483f531003ed3c41e8b816ec0f1e. 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/QZDA72112272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c56971a3fb30c5cbb4eebc57843d10c9d17f75064ccf915d854afb4adf354. 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/QZDA72112274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc41d1e8663cdc175acef763ff120fa346af8269132f0d57afec067b2a086c2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:52:43Z), 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/QZDA72112271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065017800c5797c0c886b367202d59143b56c43c211b5346381a61de004ca04e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZDA72112273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcd7ab16e1468a41dfe8d6dcab92738233a795fe681743f4bb20df180d15dd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZDA72112275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29e6f8ceae7fa9c36c1005186d46ea4aa0c6bf46a322b6cf4974ae0d3ff3ec. 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/NO2DY2400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10047872373cc257a313dd5bde72cc2830cadf8c939dcb75af1a9f88bec0de80. 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/NO2DY2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739f4fb93e06e5de8402ab4bcf9e091e269e00b9a5d968576b8af012aa07c54. 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/NO2DY2400022.