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 0x4ad77830b3eeb6dcf583723229071f4c4f7150820357adad1a08e6a1d0f1c671. 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/75bc49d9-4c21-4b08-8e40-83fe4003b7a0.json and https://artists.proofprofile.net/proofs/artist/75bc49d9-4c21-4b08-8e40-83fe4003b7a0.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 0xe651e3dec8054a3a957ae65bf7ebc2269408470564fe01287eb2b4b6021149d4. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USGOT0431001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6210660a12a3806c05263de93dfa69cc9a1fbebfcdee9a43cc1c6a488ba946d1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USGOT0431002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f652465ba23009a5b79241111adf892b4c0c62bd21a47efac4512365c036d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USGOT0631019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1c9511805f0a4705cb43d96a6d869d53e96bfb6cec5615eefa8e4eeab1cc30. 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/USGOT0646075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd386497ea2fc74fb6ead7cd4c4fdfcb6389af958ae6c092cd2a9fc2907c50778. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:11Z), 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/USGOT0631013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a51c914c166b525f1d1d779dac7ff1483c8b4af3f1568fa58c98f9f4373921. 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/USGOT0631014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9144b6745c908f9f4cf7bd92448ffac94788b5f761f5d4948a8f1483b2d7b13b. 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/USGOT0631023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdf057e5d4a581a5e652062b9c4886f4ad956481d2fcbc9bd862e41801d398a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USGOT0631017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c85e8006907495f217585c0734aa96eb4761fd1cdc68926a4c72e9ca352c3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USGOT0631018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d0708484917e60235ee83190611b79f9bcd6b33da68a137d7e6a20ac23cb2. 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/USGOT0631015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ce6c7172e9a9a3750d550c511612bc52cb4bb80ab783e9c79a52be8968610. 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/USGOT0631022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f208e87b8f046652fd1f73b113892641924146e43af2526b006c9c7a774d97. 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/USTN10800573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6a1c1913f7328ad3efc2db37652d81511c9a685afdfacb4930800ae1b74cc. 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/USTN10800575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812d466397e1afab1c939d21630d7892420e5a36a889137c6b99cfb24ec2f7f3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USTN10800576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345854e5e3e9fcc334eacd5fb00c4c807465dc0333c9551fc39f5ff3e1eaf458. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USTN10800577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5afe84f3eb35a2912ac794d67d2c852a5146d95a6414a1321b6e174d26e1e8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USTN10800580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f95c357c40fa5f60e0031ed9f091b08be0b911e7ba7a102cc8091f3483463e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USTN11000175.