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 0xd0bac3607d8232c31a2146cd1729b890b8c854f728aa772cfddff3a8c086ddb8. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38ef91f9-375b-494c-840a-ee98a4b0a230.json and https://artists.proofprofile.net/proofs/artist/38ef91f9-375b-494c-840a-ee98a4b0a230.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 0x3d090e45e98ce84aeda13eb8810876f677e627f97ce9870a578a3025debcb378. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEAT71003361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af531fca5a7319998a915512953812cce702345c5eed395480e3842dcbc39d2. 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/DEAT71003662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466e8c765794a490189c71097cc5c0bb57fc2034971405da54b5f0c4bfe762ba. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEAT71003364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01812080b02812c8bdc9d99ee254f2a1aeb33a7711b1d82c851c695a44265a18. 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/DEAT71003365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc6f162ce3ceec0b03627a806edd0144a19017ecbad8ff916d94f779128d33c. 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/DEAT71003367.
Of Tragedies In The Morning & Solutions In The Evening
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32c5c0459c3385b35adb86fc0c630c94975e8b674c11a6b83870afc0cc1535. 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/DELJ82015233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a69f0afb31e5d5f01a3ed08d6120a5e2e0d7431b5c873aa3b0a0cd52853b1. 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/DELJ82015236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a0e70c4f3e9e0b36c21ad4b2839381c626ab887ad7fe31d2d2681c73c1a5db. 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/DELJ82015239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e1333ecf16296da6018025678ae9edd42c8ea84d04d71f5be072e3abbecb56. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DELJ82015243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc450077e397b23a04dd0b6379326634bd5a1719fed1f85d05f275808246cd. 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/DELJ82015212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d83f2f22f85d374c914f8c22cfd1c459a5ccce12f095a87770514b1c9b5db. 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/DEZC62330322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435cdb2339cc4bfb0e3da01117c75d1a9626e284c43336085ed6b763522fbcc. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEZC62053117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284287ef0edf20961c71212c636181f15f52dad66a76f927983002eb5088ca6d. 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/DEAT71208066.