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 0x99779a8a1ea8c1bbb7743474b96b3ada0128a5c0add8b58705242e55c4bfbc49. 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/0be88a2e-dcfb-479b-bd76-65dc356eaf9d.json and https://artists.proofprofile.net/proofs/artist/0be88a2e-dcfb-479b-bd76-65dc356eaf9d.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 0x92375e8a4e28495f48ed80d7ee7fdc960db25b0604355fae6b3182c280e5a87a. 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/FR10S1615870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63eb78c18c7558d235236d4dce7c18dc05eebebb25b6f94f527a39c3d839f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S1615876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6a1e7961cc4e00f6c0ed16fb3d2f1eb77ec6c010d2d1c5e203fbce4e72999. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/FR10S1615882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefe98f3e3c71fd2ef7c99ce7cb8cbbf71553d93d92b24d7e777c5bcea2e4d66. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:23:14Z), 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/QM6N21945153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ea9dd8354816d71a71d091fca8f63d9ab09acdf527b3cf3fc31261772243a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ARIXB2303296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6650741aa8c9d75ca2910e9c6723114e9d762627be6cb02241b6d2d9953045aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARIXB2308658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9491a4c5cd2442eb7e3bec54f49bddc013e9d75b7eaa8e6f5e5dd2f5b4a30a6b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ARIXB2308656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6650741aa8c9d75ca2910e9c6723114e9d762627be6cb02241b6d2d9953045aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARIXB2308658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac7e846725427f67a05d36929ca1263807ca2f39849075c94349e16e3a2b3b. 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/ARIXB2303297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ea9dd8354816d71a71d091fca8f63d9ab09acdf527b3cf3fc31261772243a. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ARIXB2303296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fda54672028b23d24edf4549d1ca6b445ffa59c946f1534632737fb1d77bf32. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ARIXB2311939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57e29af9a91fac8b1540733a6893d69ea0a9f6008b9c92a2dfb0be0f8d58bb. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ARIXB2312756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44514082f9cfcf7c1eb7a48061d0db57e8c62ddecec79f16b23fec72ad6db010. 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/ARIXB2310480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f89a81a63921cc89892ce3f4a55f6f882a76aa363603e2b45e307e66dcd2d2. 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/QZNJX2328528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631c2a04710c675fbf5929c70e00fd11453242312a0902f3320b9bab7c65fa4. 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/CLOB20700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957134189cd08539a77faa94ef39e352c05cae7bbecd9efd79155f81d7207d52. 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/DELJ81516330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18207ad34445a579f7d89b079803cb1c46797166724b4d2128a7528dcb86b8. 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/CLA572400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4756fc46b4a85d409300574b7b982877e308f98f2609e1d5c2ea8586279d9e7b. 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/QZW9M2321281.