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 0x94fb2ecc66be5d374a59d1a1a018a285a9b58a0bcc856f562e01b50277d605de. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df312d4-d05a-4508-b09e-8d47fe30d059.json and https://artists.proofprofile.net/proofs/artist/4df312d4-d05a-4508-b09e-8d47fe30d059.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sin City [USA (American Gangsta Edition)]
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 0x5bd9833f340bdf9ddc10cbc7084f0fe43e96337b6b6509cdc6bbd5a6447aaf6f. 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/ZA56E2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca0bb9b36574360a4efd0ca40267047e7c858b5c39d1f21e151920313edcd51. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee31eb282e0bc391616fbb2e8c5d47faa424d8947ba21cbce2e105cd042be52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZA56E2200075.
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 0x324be981cce8ad7f259f921e5710010a2ff3ae4041d11de5211429d0ea8c6ea8. 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/ZAPJE2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e354c72c5c3ac44fe957802ddf87f43d605fb0d557b5b3f975b3b8f5c133927. 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/ZAPJE2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee8275c5fdaadad1aa79a15686d0eba870a393390718e25ea95adec09b481c. 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/ZAPJE2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3195fb5160a96f8177ad44e1bed790322a56f5b96ef93d3a4986640f80e73c4a. 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/ZAPJE2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1829f069159ee42264f1ee0af7b73b3043e66f5b16780e9c35f27568033b72. 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/ZAPJE2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba71fe4640339a155632ede0485f1ddf53e230ca8033cda56db923cf70a334. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZAPJE2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b95b07f258127c3d65cf141d53aadd35b03fb3b8406a5fdd861b0f5e630e2bc. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ZAPJE2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4a218b13c25ab0633edbcc429b9fc804392a201133a41c895b8dcf0edfb533. 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/ZAPJE2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f96405a3759c62918798b417285d58c75a1857d3c94707fd81a41c032ca51b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAPJE2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b56dd1e1ea6206bd46c63c57e758516126769f5909ed00033c90b6a7c634633. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecbdf0e25a649ff321439f9cbc0b6a522ef85d3be0a9f6fe0daf783d88d3583. 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/ZA56E2200861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39870e1f74d9520c0fac71bda435d933309d3a85fda75f5bab70bb6632c594e9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZA56E2200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ba0b5469dede0496ffa78e1a51d53b21665f7d7c7c75ce37e1782e31f6f7d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ZA56E2200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f5a9cfed8082f3c82952e254c63dafd93f35c726da3aa541c4d42b3ad9ced2. 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/ZA56E2200864.
Sin City [Italian Mafia (God Father Edition)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace28b425aa0bacf1917599685dbe748792c3f50d4a6f1a3137e4ed413e9ede. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84be10f124b941576740f3ee730b2308a1eb2fa2a059b12baef52fa10ae7d0. 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/ZA56E2200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39345a58ced7e856ccae633d5277a4cc29de18b9f77741984d480485ad62c86. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ZA56E2200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cd23020e704e8b0e12ea5aefe16da1333261458e572c0d728bafb144579985. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAPJE2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58f743b9e14549660ec85cf10caae97ccf083f98aab7738610a62584981f01. 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/ZAPJE2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfeabe734d84afe8db5ea7847a887e0e356e52a4d9ae8c89968f761d5bc9c79. 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/ZAC031800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0a47c9e097ff507500c3a81f1b6ee29a4e3c847bc4443ac0bc55dbf300c2b4. 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/FR59R1622718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90990c9e1a8873d9e0790fb935fd0a5a687469b9050568f639e95debd34fc52c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V80189083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e4ed855f69e2263da753192d44eb778046ce5a408a91b6944171b9bcaa25e4. 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/FR6V80189084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c52f4af33065de292f1f9265008a3245defcdd4b9c2de3ddfafd662fb6ea83. 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/ZAY591403243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9abcf378d907b0514d55410adfe26765c6715037e63e92f69cc3a9b9e61545d. 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/ZA56E2200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b998805299d920a3a5fea62771b79440a20a83d759d3386daa29c33c9aff4da. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZAY591403242.