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 0xe2063d4320172c200f700fb3792775561d552338b6794bd8000447be1bc0100d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54529e2d-4610-45ff-bf3a-520d38fcd4c5.json and https://artists.proofprofile.net/proofs/artist/54529e2d-4610-45ff-bf3a-520d38fcd4c5.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 0x95d6b8fb2120b7dceb56a3b2155306ee6a9e7e3ef0cdfae9f1888496725575e0. 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/GBHLW1901438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f50c74e952e83f2af4559bc6e9a46f2033764d2afee1a6f351365bbd87c214. 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/GBHLW1901440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2e2cb0a9154c4f837f17f8b23835c7dd37cab4694fcff99bdae8b8854f589. 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/GBHLW1901441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf9242aa86df671cfd7870b309e7fbdbf37f8daabd3de4539ff2e717a544502. 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/GBHLW1901442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee1b2ca06026452ae39b4010a137af7e9a22bad6965d78a6d0dad740f8be86d. 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/GBHLW1901443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9ee02b6f58f3a049ad28b15ea689700ca749f008f06b65bc9c998663a9e4d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBHLW1901435.
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 0x6bbcbda0469c5ee6b3f6b637ce3f97bf451ea34653e6317a01e4a525fa0bb902. 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/GBHLW1901436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96c1c2c93fc8411a9b0f72034236a6a0101e6c93d3193db761c2c6e3302e6b. 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/GBHLW1901437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c76bf7e7aeec5aea638412ba91c585a5ffe6d826ea97fcb6adeeafa8fd8d1f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBHLW1901439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fa02da63f4515322bd7e220f4ff8160cf0fd27303d0270b749c497feccaabe. 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/GBAU91500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d724006a68c61afb976b5c60726cc77aacbd2da4afb0cf6a568b4c79930959. 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/GBAU91500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac0ec9191e12808bf9f2508fbc7ecc4baa11c211c0b56973b989495b5c80bb5. 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/GBAU91500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db763233c1cc38ed1ce5923d8894f30995aea6d237c74c89877b8af90c927ae. 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/GBAU91500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a32a88b84f1e0b5704e27a6f7107f92219d94b3ce06fa23188739bcb55336d. 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/GBPYE1010020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf658e0d9060c25a7bd6a5b78a322ea23be2d34d92b28f47df1e5d345197ca6c. 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/GBPYE1010028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958bc71ac276ae2da4d60d56149d9400b92c34f440628d1ed985b2ad61300d60. 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/GBPYE1010021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5561e86e67ebaff821e45952884fd9c6e85313ab9e02ac80fbf620ad68cf71. 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/GBPYE1010029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016dd95d3ae904790c2318c1b6b69fac77aa15812c5ea71e347fb94ec1f8c7e3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPYE1010022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739fa75dba2a0c7cc2a0fed7ef70b2f1023bdfae4ae03e5b05d019be0c6d852. 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/GBPYE1010030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835a696090cd81c36d35027b45f22b7a1359c8f25d112bce4ee7497a77b0c99. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPYE1010023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d005cb712282e3e045bcee228c24e719e4e5657cf40c257d8909021385f54. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBPYE1010031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07ee852c7fbb40fad47b103b9d6493ec5074303a525a24ccadfb3f005165e4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBPYE1010024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd76e776a02763922f4fe6c13e7bc9c71b31f246b50bcd829e63cb1deaf72701. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBPYE1010025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8587c92c8cd71ff19cf540261a944e94975380acceb4565b20116ac1d7a6239. 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/GBPYE1010032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11094005da0f732a145f3ea12663d75e80bf0be5e6f98af1d0fe51f72b23f2e2. 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/GBPYE1010026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b85b0287e6f0076ccc673046fed2edcf8bf9d78f75580efbe73fef312f0c91. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBPYE1010027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8914a8b385bb95988fb5b84a7049d392e81525c3a2de54ac986a835d6d18b96b. 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/GBPYE0610006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc22c3618e14a0e123d2048e159abe6878ea02aa9e7f55b34c29b0e65e5562. 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/GBPYE0610005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617899f34544915da202217a39c4184e8369c92b7bba5508d32dd7a7327da409. 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/GBPYE0610014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c60447b1edf26b4970f91f34bc21c2ae49843b9205eafe9f9730dfbfca77d6a. 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/USQY50971920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b1dff8a9825732821044a67a5bd0f4031da1751429125bbddf0744cb84258. 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/USQY50971925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6373d43324326b13e077e5daf1a13a704f2c85b421ad7b4cc6fbef0e6b68ce0. 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/USQY50971928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36875a3ba98c2c9119730287874d2f1fa7dd7a0af5db2f229829ccd4e5ee10db. 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/USQY50971919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff4707a9f4acc126779f08624f21aeabf0e6ca63cc99c3289528225f5bff81e. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USQY50971921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5634e95f77c906a78be6f5319c986b7bc523ec6cd9d019421b9d792b4c7987. 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/USQY50971922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088514686b1490bb8607db1ae4148d1f71900153da61c6283f615997a6efa239. 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/GBHLW1903290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9bed6b78468f74c194f5891e878883f10bf9068fb3f2573f52528207d47bf. 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/GBHLW1903291.