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 0xb3acc2cf41d48f4346d48d61b28e5db9ab81114965fa943051089fb982b3bfde. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c9aba2e-4860-41d5-8d4d-e42503596949.json and https://artists.proofprofile.net/proofs/artist/9c9aba2e-4860-41d5-8d4d-e42503596949.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 0xbe24e6dd3ae450187a31b5a939ad620b9afe0cbd3b3aa949cff405f628fb7b20. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWP011951514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d52a62c9659c1425ee1542e6c420feff40aa07392000945aee98c1e4a330a3d. 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/TWP011951519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ca1cd1cada1f84cbc7d479c655ef931ecb9e0575ea035fb40a277f3c6e6d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWP011951520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77720256deb32079c08cd9285235b7d34a9e3e094e1bfe999be8e7098b5b4355. 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/TWP011951521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbf5fcf3869a0cbcc40e1256fe4d9916ee7797cb9ccbd3c45aaf603ba271c5. 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/TWP011951524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede107be150c035739dee1d2b96b8bdc558416c24729b466e673ff298f1ca0a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWP011951525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ad94049986106074fee550368d7f918e9de3ee2bc4f42a662aa0deaf0223b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWP011951512.
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 0xe336edde61b58cad3e5c65e14d7a2a728548c8fffc5eb8e94ca620f3954a283c. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TWP011951513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb384ef5367f175bc821e588155c20928564395127f4a5fe413b358eab9e409e9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TWP011951515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f5ef29a8a4cc737a57ce844ea0289211aeaaf5a35376baad415136163cdd3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWP011951516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33935a8c63c4d5190da417cc8935d0009eab83c1ca7739a7dff348ec15b71c32. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TWP011951517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb19ab47916e105fb0bd60f71a24e29fd5a1ade4cbee0e71b14d00de9928c4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWP011951518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b4ed592653abf2dfa091b29ff1adbba35f5425f7c27647b9ab5b5a71caabf2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWP011951522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dc1238d53d0b0768f43ac0264bb3bff4725306aeb35e6233c8184bb25afc6e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/TWP011951523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f5a491e082d1ad7155df9c2edfd038dfa92d60d4d073fc5df589a263df0715. 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/TWIG32200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef0ce7ad553a59109a4f16ee2dd20b6c2dc0941467fc086b355e780a98e6e17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWIG32200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee2a19d3075dd107ff31bd03f6ec38ef4a56948ae162ce41740fa4c3bc1d62b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TWIG32200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdc57eb157aad93b2946adef5a01dd55db83e4d10d99f408966246c3075145a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWIG32200403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63809edbf88960b1be7d6a2a29a06b92a70ca3e91307de0738371ae20d11babe. 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/TWA171302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741070c0bd1e8552909d89013176611c409df8c16eb0bbbfcd332c54d93a688e. 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/TWA171302902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da50d7aad41c319d406e0fff90854307aaf32c2436217b4b0cc3390e7bbf7af. 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/TWA171302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c6195e85bee6238e67cef1b875c5ff3b64f483529d23649609a1ae4ca1ab1b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWA171302903.