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 0x832c05ff062c33b1a2df8dc5f0ee3357c03d7bd02d960ba63b3476e7ed7fcdfc. Chain 2 (Bitcoin): anchored in block 954000 (2026-06-16T20:18:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31d81fec-7244-4b4c-899f-dad7d90a01ec.json and https://artists.proofprofile.net/proofs/artist/31d81fec-7244-4b4c-899f-dad7d90a01ec.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 0x7da1f7eeef1f931c4a8a0fce4d56ce4f8a954eaf1b8408adb6f140e396bdacbf. 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/TR9382000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651ca4831c15d9f088200c0f994473f0eb50113f68976d274cd02b7b072d9c64. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TR9382000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a18fd6c8d97b0824578b35ca4bad11be7d40b8f448f6f4bd146a132ebc9635e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TR9382000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe42278828fb0225c32ff66e2493e073a4064cc2423fb4502a2f821ee5bff8be. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TR9382000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56f8b8893e5d08cd36fb06b5773dbe978a9a8b732275809483dfc41b3856aa1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TR9382000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4a10ceb808d647f9ddb35caa1516ab9cc03734a73e31c39c0c49fc11d25052. 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/TR9382000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ed09ff52f331b1507ef95e583e6f709b5d5752277177e0d36ac0d8e18e574f. 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/TR1231500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122746277038aaa0519f19e861ba7f3a511fe78efcd1d72121ddba748a8dc21. 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/TR1231500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dbc2fa4497d9285dc81616d168a741b41aa8e44dfb1fcbb3d44df798318c93. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TR1231500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361038c092770c999b1979d154dfa043259c736097ce032807e886522bde290d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TR1231500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bbb2e02622fc6fe744a0fcdc27ba6cd9b0b0775e2eee297756c3ce456b573c. 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/TR1231500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c6e38192d810fe928108cc01945bf09968e2d57dd1f9891282cf421ee11cb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TR1231500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260eae280044d508e17c8ab5640f5bfa5dd45524afdfe3f2ca42b98887a9d10. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR1231500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8011c18765df9aa30101d574497dc5e15b71ff66a0d781a5cdd4642473f4c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USDY42178581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84614b25e601667d2d96c404587beb4b5591badc1a7bf4487d76d176c2fd3709. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USCGH0966497.
30. Akbank Caz Festivali: Dün, Bugün, Yarin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0aa3caa4d53945ab1582f27a1b7f80c6610c613e523bf31c37ddcb65a91f25. 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/QMBZ92034783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9b486b4badf29249477d1ac3b5343141efa9d0c128878f492b73a49ad3c91. 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/QMBZ92034784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33a8e780af6ef81a77d15006369702ed84ec02d812194cc33d6f8826d7b4f75. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMBZ92034785.
Ballad for Paul Robeson / We'll Be As One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf494b14b80f1a6bc28ba72cfb1ce9963e03364c36711d7529af4357549414e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMBZ92034786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccbbe1cfe555cecb9a36937b68befb4ba57537576d5cf6d1164de6a007b09e3. 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/QMBZ92034787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674286a045c64391f891ff85fa89d2dadab4700454a230ae6b9742ab035d5693. 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/QMBZ92034789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5775965cbf7424ff94a8f2eef569281fe5057647149f38f4b118e9338481b10. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ92034790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0d52f6bcda31f3b4203eec661590fd792513ca4e279f547fca2964bde61b8. 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/QMBZ92034791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb35465a241570fbac09969c00a3328999149f2f0fb73698c62f3c7a73952c2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMBZ92034792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac04df0d7eb5cdde252501c5e5b0e8196583c1bab8f7bada1fb58a8cd4788e. 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/QMBZ92034798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef6b5fe03d75a50c75d1db4bab74bf635fbd181798a3f1e0d92d053b2a408c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMBZ92034806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49a467563ee7189d978a1cb2d184dc50da826e5c9b76f47a341948526336a33. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMBZ92034809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221068cfb4b1be472fdd16f381f4a993b102a66f62f45724b9dc711c79dab10. 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/QMBZ92034812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11800c7e45f147d6400bb02dba8c42c9e2bc2da18e8f632648287b8993f952d4. 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/TR0282406955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a49c8668dd1a3fef5cc504d0e64881cd8c14dbb8e65171d114ee63ddd87b7a. 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/USCGJ2155628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c31689cf1c79bc01b677abbb31860af8550eb8ee34ebe4aa83dbf548afbec81. 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/TR0270701194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794b9c14da8e49760b70cde672a4343995e3bc688fa43c5fb001be38f773ee5a. 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/TR0270701196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a90f08f0c9250397bfabd13bafcde832daf15828ff416eb3c02a210795831. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TR0270701197.