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 0x3ccc0f2885120ba4e470c31ca3631de68698f8695d4995f1d474eb50b6538d02. 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/24aea3f3-4ef1-4a7b-a81d-d83e3aea7d28.json and https://artists.proofprofile.net/proofs/artist/24aea3f3-4ef1-4a7b-a81d-d83e3aea7d28.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 0xf1915c3965633ed2290beb090d0aabdf38fbba4f7a10645367a4c5075479c50a. 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/QM7281501497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a62f587b3a7c04174302a6659540b38d764303c7023ebdfb0919ddefec688. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QMDA61592396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe02e95455a7500b5fe53bdb8113abc0ef3d1ceff45dc12e80734dd88474f99. 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/GBAHS1700438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16844be958fd15c5bc3bab1eab9c8a509636edbab9a49ef7998ac763132d898a. 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/GBAHS1800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19504c72d78477a0c4b1bd9ae79d40d6e40b5eefd6668578ec25454f85a8156. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBAHS1700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222097b03cb1277c9b5b5631b5763c463bf509b309ca6b284032e75adcd8c66f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBAHS1800438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe66f5db3a4c19f38a04bfd65cba9b58ba45be81f4cec90e0545d14f8ba36a12. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:38Z), 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/QM7281862304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d3ad47dcc46d966c74910a48315f25517599eec3526d9a57b6512b0c17b3c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM7281854987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3828668da7b25c7ace19c236038fc5c322f4d888445ba0eb7d5d820be13b60. 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/QM7281862301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125dd54bca6453f313faf58b1d04bdec107d84ba5189480c5c173c5281ac6688. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TX1997408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cf8a129790fd0a36e5d424acff3d11611d8a4c66112a4c4f8d815c1c3ca0e7. 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/QM6P41919553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81dc0795a46839bebf2ca04866bc4ef319d0b71017ffe2e646a4d9515b50185. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7281927788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8911f3a2963d44d3ceabcced79db70ba1766262fe75c9dae078249ea1bce62da. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:19Z), 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/DEQ322000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e9c45bafdab3e684fcdd9be1be4ac0f4d501f79b58f4603dcf64beadf9bc51. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFME2151911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa79e4604a170e7398e8f4ae22040e287c16cd643536617a89e2528cbf306ad. 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/QMFME2227578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076e00734e1eea0be8286810da83d1c869a4c08856e6c3f3c86fab2770622769. 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/QMDA72193820.