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 0x1088feb599ea8a36a18678657f42fa0a7b5e3182f0e7863afdade710ba489634. 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/3ea64db9-40bc-42e9-970c-9b73c061610e.json and https://artists.proofprofile.net/proofs/artist/3ea64db9-40bc-42e9-970c-9b73c061610e.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 0x825249ba798464ff1a74629f17fa2980c9e7fab284c35f6ba71af4bffcd0d829. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/TRASC1900161.
Hani Dersin Ya Tamam (Akustikhane Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f1b962d882527ca0a0c8a2c6b69602e6fef043cc71e459bb42ed97874fc6ee. 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/TRASC1900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba7a2ec05148a958122e512d823fab4bc0ccc8ec1039a52b6787459b65a181. 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/TRASC1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9238e5be815b1c2673635e655faa7eb816f0a535c3d94cd2409f3af701613. 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/TRASC1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d13778e4ba6448c6ef7a9ffb6273f03cec93b888ecb79144a87237371fdefe1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRASC1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01474cdbe497c9e29ece6f72d6a6c70eb88daca7582213137a82761568af7e1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TRASC1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825249ba798464ff1a74629f17fa2980c9e7fab284c35f6ba71af4bffcd0d829. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TRASC1900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f1b962d882527ca0a0c8a2c6b69602e6fef043cc71e459bb42ed97874fc6ee. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TRASC1900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3b3f2a9bb182b51466fb2b69f2662601659f1c78bc006dc5cc90cdfd4b46a7. 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/TRASC2000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf2cb6e3da0c46bc0703355cdef1f28b34a269b053f6c4358ec116ec0b1f274. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TRASC2000263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d526c9dae9c683db258239a8f35179189806ff19c00477ed56dc6218572dbc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TRASC2000264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec109d3575da8767835dd242c8cb0b89aa1c029cbaca3e696fb7f0aa796e8f34. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TRASC2000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c889b334bc4dbd6ef4112d784eb50a33b0af5e9667495fbed6894e4ef37977. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TRASC2000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9778b139bb4acc79f75074faff0bede1c9542d4191a22b6e8fd24224e869b1c5. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TRASC2000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cad54f99d08514383be38707a046ff62191e942c71654565a9a7f78300be33. 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/TRASC2000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409fcad2cd423c3d100f23c7e40c41511c7185aa5c805099677d561b9b7437d2. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TRASC2000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05b44f2cab171508bc6d2a80bd66e9b9e1ee08747fcf987cd28313b6286ff2c. 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/TRASC2000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ed934fdde0a4f1f57d5af7407760873d6d159fe987638c7cea498519e29b2. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TRASC2100311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81607024c02a3511b1834ceb89190542428b42778afc59216d3647ab8f86f324. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TRBYM2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc31a91920c91338d7dec932cbc45f352effde3ca0e10f0552c209a0a90906d. 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/TRBYM2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c3fff16d5e60a2fde3941427155aa0fa8abb0d82b939310056d42a20e147e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TRBYM2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a55d227209fe0e306fea3224669a857f098a9f33794f2147b0553dbaf0a3ea6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TRBYM2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc31a91920c91338d7dec932cbc45f352effde3ca0e10f0552c209a0a90906d. 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/TRBYM2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a55d227209fe0e306fea3224669a857f098a9f33794f2147b0553dbaf0a3ea6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TRBYM2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aad908b1740649d52d1cfa0ea05c447e34e6f48b2262161d9dacc0f2ac3951. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMFME2350555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7852fb0bc5682d03ad2fd70ca592de5469fd0b7fc9c0fd9cf7473919156f97e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6MZ2462565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7bd2010144459986c4b9f63eb74b3b134023cc68b43501a6e8f6e96ded940b. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QM6MZ2462559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a2c7ec049e0c9f1923ae385be46cb2882cdd0f817055ccfb9768b2fda737d4. 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/QM6P42522400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30244d653fbcbee287f80b778d146d23b14f9fda6863bd2bedf63885ca88c0f6. 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/TRASC2100321.