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 0xf9cd2c0b9e4e99fe7cbd5b6bfe2c03ce6f775e85078c842d402bb748b9080c4e. 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/cee08ce4-4ae5-48db-9c63-dfbe7207886d.json and https://artists.proofprofile.net/proofs/artist/cee08ce4-4ae5-48db-9c63-dfbe7207886d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2bfeaa8b02491dc5ebdd69dbae3584fe75a8983d3f05cd6202326991ec8812. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/VNA0M1839145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c53e7fdffc6ee5eca2d1bbabaa9ad3f063f3a7b7849d83d0d6bd7e6c72f9b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:50:06Z), 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/VNA0M1839148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2bfeaa8b02491dc5ebdd69dbae3584fe75a8983d3f05cd6202326991ec8812. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0M1839145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2012705d4e4fdebbe9fafbdc06733a826249e2de4b6e0c7a4a7ad6df5602854d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:14Z), 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/VNA0M1839150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe622b6feb4317b18e366eb07e7e0704b4a9e67d41ba31c4d61a0fd692b9c7aca. 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/QM48F2000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243dc98a801be3f9b2b324ec2939d8b2151e2e56bd0aee4c93213b7c0ff87145. 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/QM48F2000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5b8750d17d518628174bc97d6315ccabb9378a47beea462552217d9a12a9b. 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/QM48F2000904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceebdd8a2dcf3befbc3816eb7b5bcb204cdef4b74b7fffd2f143273a99f37090. 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/QM48F2000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37853eb35fb1938f33e6263aa0b59104edcda5f05c1ffa43c49d86f469e316a6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM48F2000906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2942f3aecd4f650186338e5d27305278f22c2c889f611061a37ffe52588b4f3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM48F2000908.
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 0xc0766926c4c9e429d5bb546ed2bb57544f9ab6d9a6c3b62f5d0ed6379c20eac5. 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/QZGCD1807624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4afa01970d1f8cf6891b45acc7714d7c1245ef6c2648695278a27592bbbcb07. 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/QZGCD1804929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd31eeaff2967a4c4a586cf3312eb1580073cf165ba53b36c95dd99000b70e. 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/QZGCD1807479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973d98bc604e53291928c01e5353e5b8e669029b95dd7ca1a76616322bce3c62. 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/QZGCD1805882.
Liên khúc Tình Vào Thu - Dấu Chân Tình Nhân
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e07376bcf13d89379086532eb4d2becc68fdb6690e646777c2b0c521382117. 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/QZGCD1805904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca564ae0b78763d7af10dc0a66e8101f14118ae899f02fb888076dcb01e382. 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/QZGCD1804796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488991955d84032c2ec3f87c8149ef0d7eb2371c96e830ca0e404d21c0d53035. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZGCD1808525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e4cf34662219deb7ac44b00b86859085e5a42d3731cd5dbe4701385116653b. 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/VNA0F2104323.
At Knott's Berry Faam (Good Time Theater)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494bb87c2b22a29636a1de892c9ce375738d94de3292f2a993ead3a08b10f9be. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/VNA0F1705158.