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 0x36db4dc8646cb185202c0f406113a1c99ba48b1e688fbee35764d8bb032f9303. 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/12d2ba03-7127-412e-9835-1207e34e2cc4.json and https://artists.proofprofile.net/proofs/artist/12d2ba03-7127-412e-9835-1207e34e2cc4.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 0xf0c3d3f7723a62bf8c260cbd22075a0b0ddc6122ff5896a320135817b816cee8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2375358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854651534355dadea59ce615bc41cfb1cfa21861e2cd5d51b83fc3a25ce7b65c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA0L2353867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa946d416557956d6114892664c3aa0227a7bf45a2f776d250820ac53f7b042. 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/DGA0L2329271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72008ed6f2276a38fa680e3add21fd4477cb0e08716505904c5b0bc8b45ddffd. 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/DGA0L2329273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db43f23edefe7a6ad1881bb73af364331ecc1fc0bd416555b69b0b7e065476. 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/DGA062462106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b7d0774a39d00694a52a150f8ab951e1d859d75b2873b11260516a68103c8f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DGA062462107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e290f0bf3e2b4e111f6499f0674a82345e540c646d89787d731ac3083da0ee. 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/FRX282436287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d203c4ecec4029ee917feedc7bd53217d43dea9e4c521736175e77f6f96625. 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/FRX202476349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5322041a89e3082ea44f062654f415b241d258fbd099a1036132d12df448d7d3. 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/FR10S2444164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ad9671cb6034b29d5d4aa1b07298e76c8453480c2f8eb96d9adb11bb8e613a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR10S2444165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897fd5093b4cec3d2ceb489a8302e1432eb904f7f6e96f9c550b17d68a995698. 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/DGA0L2356854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63fffb30c0f6a3d19529b251b155c3d5b878ae1579eb52e104ec5b3ab641897. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA0L2353105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89110fcc727d2ad7c1a0ddde6a906237ddcb8711514e5a2695b6f2ac4eeaeb87. 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/DGA0H2314486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffed93a23f8212afd3a0d30d8701b776f5d5c021022984c7dd2d13394808ca1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA092375651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c50497c701aaae7a5ec56287095a5fab03455abcce64ea00fe2229836c0fe5. 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/DGA092379074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01233d2e837bce2a9432e384ebc301f2aa69835556f3ad694786ba9399eeb38. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DGA062345502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3705faf8efeb9b9c0050030a63547314ae9f44e671f3adbc63b6fdc04430167. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DGA052368176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d43d6f77ba5098b1a93b201daebbd344a380088f801af2fa6278a007f08b07. 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/DGA052336127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641fe1ad859da71544884c35f53ece5820c650744a950ec91a3e0c503981e48. 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/DGA052303104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa69e32484b14789d0511a0eac999415cad45e31a8c86466a6cac4e0161448. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX872337681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d28676f245a5ee41ff0d078f06a5f19cc2342e278feae81d4f38712f55d7c8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX762386740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca9f0ce2c4691e2765d45576ed0b8de3bec1eccad10735d6ad57c7bee5d6c13. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX762313735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bc2259adc1461d1a7daf9b319aa8471bf38d0061e30cbfaaf293a68cc939d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX282347313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd76e0f717c9ddb5fac095463f9ec213aeac8cce4f9bfa7a020f9d55dfef581. 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/FRX282315011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f1e6b93773d1ee38d3ccb47ef948cc2836c2870a27f0fb424e366e3a86e015. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FR96X2385274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce402c16128545d17a47258b136f990aae2105386f0330a211974aefb290cd43. 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/FR96X2390745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310b880148c776339a2c06dddb215c9c8adb8c8272011b3d0e6acbd9043affa7. 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/FR59R2331467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50961811837c19b38dd1ac4b48406e103862130551ca6192f738ece9ddee4acc. 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/HKG732244759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5a8e7943ef55b10ac9464b1c13373ae233fabde29ddda15e1cf9dac7a92a79. 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/HKG732244527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293f7326c143dcd8fbb761a48fe27789591b84a88e9f613dd7a3ab1940f41ddc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732241506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd56b07650cd0efc3aa52a91e0a20bbb4ae44f0511d1635616bbe958448652c4. 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/DGA0L2362706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a892b59d66b2ab21bd81afe0a09f07f36caad3f1d1ca47c7b4b611ea5a18ae. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKG731720494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97136df17c558a299b6342610c47ba83fe58757e7df484a0311c6eb4d2b1b5ce. 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/HKG732157396.