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 0x1a479108f7f14ab37763ebefabc5db88896c8075a97f4ae00510660610346d1d. 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/d06ee948-7928-4e57-bfab-69734b8a8494.json and https://artists.proofprofile.net/proofs/artist/d06ee948-7928-4e57-bfab-69734b8a8494.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 0xb5fed72da3bdac1ca9df37bfe96e113024cd104a103442371eb57c1db0c166b7. 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/UK3C41300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf30b7c6fbedd1b13e0e530abc886be0eecb4cf3dac2c7e965ac27aa505fbbb. 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/UK3C41300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7763259c3f37277ec623355b4084c3d7cacab8a71b2e7e3dd220db4636d62922. 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/UK3C41300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6150e0f08a55cfa4a0cf8caacfe7928fac587c4fc1367a8b3fab74e84b837cba. 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/UK3C41300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4932822713cae550d11bb56b9e2b46dbc453db2de6ab4fa84dcedfb26b4c5fc. 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/UK3C41300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523a59e544e447d6f7744fa4146dc4230840222d5b5a6b980bda5469869e762. 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/UK3C41300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf7d8123c78b5f01a566f9eac6fb0a0eaea9d96fd02f42b546209b757e8c1d. 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/UK3C41300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb5936359f984475e4c5e5364bc0b41215cfca98d2945e8f6e6782d74151677. 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/UK3C41300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf3394c3c764c41004a11048682e9474c187133d83a807c90a9424ae81f02ea. 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/UK3C41300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3cac50929e923332f69e2e205bdd6227368da2b1c0015f35ca1bbf6b907472. 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/UK3C41300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1966268ba239480100594eff17c32b1236f45f7e60cce125885311239e0eb. 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/UK3C41300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c13a9c269175f5eff55cddbc11f8fecbed3d8dbf268af37f2a4670a44e1e007. 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/UK3C41300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b34f432dd32dc8ce94f2353ea42c331e2f2d95db40785ee4bfccb7cc6ead88. 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/GB7UG0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2da31ff435ca1d71f7ba7a2eb6a4ea19bf3cc4b62ac7f22e78c374d4552f8b. 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/GB7UG0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b12825f30739f5aafac8bb6f96a22e1ba8a5e83018cd6f3086a44155bac57. 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/GB7UG0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1af70f9e1132105361e5e3ad800ba4ee678f70112ddbfac3c93ebdf707e0a8a. 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/GB7UG0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e3715c2fc78484f541268c1381f8df4b45f426c1af86337026ad385cf9ade. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GB7UG0900009.
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 0x574bdaa81abe82f26a9bf720794d2d5a825ef4a6fad3561ffb5e4c49118142f4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GB7UG0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6bcf590c76cb5de99e21311355611f417f9d1acb08228ff11670f356246fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM20901239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf4dc783b609a7f1a4e7a9cf4efcc34e1519b3047bbbdc17c918756355aa3cf. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM20901240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3095292864555ec14fd1add6f221b6f53aeb7dcad96fe49db54edb593c25d4. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USHM20901241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ce830e26ae8e0f1e1078ba1c14f1adc638da69df7453e87134060bbdf69c56. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCHR1302046.