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 0x881805c7eec67fdffeb25dfdcc55452b9cd03bb02f3d47ffebabe8ef6ea0f044. 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/3a28d6b3-459d-45fe-a678-96a45b6bfc49.json and https://artists.proofprofile.net/proofs/artist/3a28d6b3-459d-45fe-a678-96a45b6bfc49.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 0xb90eec0a785e471fb0203510e61e9ade0d7ef1f2084649adfa5edb881f6ed82a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US2S71264001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb52b24913e8b8f5f91833f4890ae0a7187ec77bea5b251481dd4a11e7072b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US2S71560006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e822aa7a54b0d74057e4f2131b9b8ac1c6a0cc79d4248be1a991f699a4c0549. 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/US2S71564002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1599db4182b38a2513a3eeb1d85f3783a574ccc58ae7c6bc94ed85d5a69869f2. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US2S71564003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a502c917dea6e02b9c8665426bf38967531ca6dcc8174588bbbf511dbdabba. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/US2S71564007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6bcb70593d656b44eee0a192e727f4a351d52dfd67f445ed78bcfda599163a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US2S71562002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc755d41571119f34814a4b1a5bbb4c6489aa3d05a3b01917967a1450ef34dc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US2S71562004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b95dd64b1a518240f2c2d66ef954cbffeb9e05d705d674f10b590912eef32bb. 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/US2S71863002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37329ef19fe9da1cc48d1c7864a96e70d289b8b1dd67f3bdbd61ffdca624331a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US25X1900911.
Vibrations (Vitamin D's New Jack Swing Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce426ae21a4da6e4e663fadfd4e3d36c689b13c404c7c82deaa36934d0836c34. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/US25X1903298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf3edf4adca9319d9c29fbbb98027a80c60a9877c1837fc5f5da5e96ed80046. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/US25X2004915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2bab73ff9d9bb98dd7bbea551d59bc4906a381517d1784a1e779d5c2df07f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM24S2405478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8858f7f4392facda9203b600d6626ff35f541e9359c111d70cf72ce8a1f655. 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/US2S71782002.