ACP may refer to: Aviation Aerospace Cadets of the Philippines, a co-educational youth program oriented in aerospace technology Airport Core Programme, Hong Kong IATA airport code for Sahand Airpo
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 0x3fc5d66454799e8d7489058276a8419d9a2f92a07142cdd54d8127a9e017b7bc. 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/b9db1dcd-4627-4922-ab39-6872615f1653.json and https://artists.proofprofile.net/proofs/artist/b9db1dcd-4627-4922-ab39-6872615f1653.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 0x761b840a1941c3b82f3f9dd604a1c0aeec8e21379b72535d6f84648157cb37fa. 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/GB8KE2417462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ebfa60bc27b7b40083739112b241ae20d8314629ead421948806a5c4156a18. 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/GB8KE2417463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5870ae40e84db0cfb6269596c7df935bbd45761ca6a065efeedb80d71fed98. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GB8KE2417471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b674a58b861aae1afa7b3f3ac0b3557beb7ff22a79a3e2f0ab85d95cee45b. 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/GB8KE2403147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2010293debcc51331ad45be6737250cb9ddf6d97be3439141f011b7a7a825d56. 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/GB8KE2403163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2776c6a561c93a0e5e85f3f9381af930d78c662c126133f863c194d134409e. 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/UKK762365001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984181a23259d1ef725f255d6d9a2133a4387f1a535a86b48adf87f0be34ee5e. 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/UKK762365002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e57105f36870a74639dbe6ad8fe96168f2b62e5a45f8008f22e1a36119bf4. 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/UKK762365003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29129b8ad98760d6ed92ea466cb0abe3ed9a5d7241c0b2966020ad724fbfada6. 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/GB8KE2320406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee783e65f875abe135488de02f9ceb1d2dcec0ff32a8a6bf809226845e4fdb. 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/GB8KE2320407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ac359c37a7379525c4f307dddca67ef7826583bbf8483fed5108e23b9e45d7. 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/GB8KE2320408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170cef6b9d712644bf0ed0722783c9d8ebc8b416b73349bd273e3edeb70686bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2320409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6227797131d51d515b945c54559ea3ca1011a5f75202eb4d2987ea30c9be7d. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GB8KE2320410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae6171b78176c3a938878a94fffbc3a86a6f8fd55dc7d7309dd0c68296b8945. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBRD52300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5958872512baafd4a22882e4778c9eed863544e3db4fd25bd47b055269d32ad7. 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/GBRD52300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a81fe792fc127c23ae712c19a39f7e0ae59885d49d91d42109fe9f19b41004. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBRD52300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f08374c8ad9a9513a4dce4a6b009c53492d8116c222f6682dc552e7c2a47b50. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB8KE2310969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938d2aafbf95be421e27e281b40e0cc0a60e74202db040e71aff0f182810575. 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/US39N2301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a963c1c45e7dd3d9f3e3c46c9b4709e58b16b7f8b8e2e6feaf858edb38c3dbf. 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/US39N2301153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7edcd0c230540fec343ce8c0a9e5870e94a23673c0ba0baec8fc89e6596a185. 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/US39N2301154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdc8509e4b698bd876df52e005b7342e6b4431d792418e7a5a731d65b78565d. 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/US39N2301155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d793e71ace9c9c0385d875b960d25749a1763eb81de5dc6544021f7417877a. 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/US38Y2304644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2795d9d4da28cb6171f6b71114318f1ebdefcf8beda9f694190b4be03d996fbc. 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/US38Y2305214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38987365a4ae11091317def312dad0e63fc7f12f02731dee7461e00499115d90. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GB8KE2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ad900bf556439059e34e92f82c9570b44d5137d9ec2af8dddacba6303b06f. 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/GB8KE2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241ff57cf8d1a79e94c548a8b95e38be5c86ca122f723f50e99d36cb05ffe52. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GB8KE2400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20647393ff66f1213e231cafe150b40227fd0395d95da2597bb8169cf471c103. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GB8KE2404316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9ae7627e55326f52369d34f4194d0f5eb1403b7b552c28e0165b649bce17cf. 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/GB8KE2404317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e528b102e0f8d3fa8480cd5098cdc33e0b56730a4af3ae653244a5442d28ef. 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/GB8KE2404318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f788213329ee6d98f3867087d8464e10586b8e580ac931148df39ac726e21b8. 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/GB8KE2404319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8316083f4011567daf4258b6b950d30e477a902a72cc7fcbe0a5c1b10e16e155. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GB8KE2404320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb7daa63f9a0ec8b839a3a6de5a5d1a1b760f39bf23f77c914364acbcec04f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2404321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfab0bbc5bd5a8879d30e13c2f54f31543915c3bb460142a2353390d5ad4dba. 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/GB8KE2303974.