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 0xc4e2e4046007f50c8a8b27bc67e75513576c7f2db007c1248e44d6c614f62fd8. 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/6d6e40cc-bdab-4840-a678-af4b7e59099e.json and https://artists.proofprofile.net/proofs/artist/6d6e40cc-bdab-4840-a678-af4b7e59099e.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 0x72a6f2357dd8d758f81d1f143fc262fc9c91845eb63941c9a1e6fd8d0f6849da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNC1993083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cfec6f16faa016fd857e799ad60fc938062972a2e414f0d1aa539b19469be5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6N1920730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11e718c03a2b759dc9a7e8f54c7bd7002b16b938c64b882aa9dd6951614c67. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6F2027689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5147dcc6faf9d33292fa7591b63d4f9db2d197a6e4fb287e4647136e7d16504f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:09Z), 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/QZK6J2144149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9973bb9c569e10ba0fd0d377cbb01ddb996a413bacacb48b8efae82e3497ca8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:30Z), 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/QZTAS2201934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb33ff3a2309bfab9e00cd75898337f4808a9819db2ec0ccfeea3de4fe4dedd0. 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/QZTAX2288577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee944b7e08212983c3831a50d1a8a1bd7961f3802a93fb4c41d47bc9b30e96a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMER2356976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce37ee5c0b230ff9a0089a0b60cfe7d4a20af992cea821ccc2cac4d8040cccd5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMER2356978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e34f18e134477803eac64bf0e1d7858ede997cd58bd7bb97f2e3eed518d3c. 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/QZMER2356980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e87b72c79aba53a07ed07a88896d7aee0a1a8d54c8b1ded3448c801cad33b8f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:45:34Z), 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/QZMER2356981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f104d07f8e19c7aa96e6a28e0fe99a29cbcc962bae4d86ed449bd839b59c5e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMER2356982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fde21bdc581682141f00d2d6d929d863b2cff8a8a6601fe9d982781ec077d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES92416307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb656bedd290858fd4f5f1dfc7e47f5082cfd0bd673ea2d2f492c1c0db331f5a5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES92416308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcaabb8902bf7b0aac6c8a6dead39294b41447a61a4da5e751253a1ad4c4cc5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZES92416310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74445f3166a7e1ee57d9820d208fab8f9417b7159bb13661939845680f1edcf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES92416314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb819b9aa5fbc9d777b1a4cb046dc90ae985159bc04b762d8449046020902e4dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA42530021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c6624bd4b7b9f5a7a4338618f1caa2264347e0cb290f4902369c2a1756f3d1. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/QZDA42530022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855d869c3df454f19d5cd812a8a003e94373eec81bc2afccb02dad3f9a83949. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZDA42530023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4208d2df96f0e3efc7055690dbf3ec341d84f28bd2e6216d4b0e93482b9160b7. 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/QZDA42530024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ec4b8eb5c55dc1d030dacc916d70a9d6f2ae892c856978d003b8efa19e094. 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/QZDA42530026.