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 0x2cf9134ba1331755b49ed65cf71444bef2d5a3d972da75712a63258e5c9711b3. 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/5ce921b2-7e7f-49e3-a0ce-fa5f8ee7bd04.json and https://artists.proofprofile.net/proofs/artist/5ce921b2-7e7f-49e3-a0ce-fa5f8ee7bd04.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 0x39c7aad2409ef994f3f95db7de2e97e27b23469248649ea19893564da52abd78. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZES72018918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2b2755aef081625df337cc8925a12ba2a12effd7c6549452c2ae8378ac4c1. 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/QZK6J2197340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d27a881ec6b7363de9644db61c003ba119ba6a8948a00487014fc97f9f400e. 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/QZK6J2197342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3650e3ad3d39841be92a872d8d88cdd36f193b7c2439f7ea8bb3a472190840fe. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZK6J2197335.
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 0xb518d746af3ddffb241d5cf8dcf6179610452cd7372d8124477f4a1be8e026b0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6J2197336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89dcc052eede6bf07ee30f9d23e34028592134ed3a0e60caf2ca4441ba8ec7a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZK6J2197337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bd621dd4fc991d288189f258818591a439c40445ca78207cc88013179fed99. 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/QZK6J2197338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76176c608b04081dbac1215d8deae1ebc30ed4cedf1370d281542b1ceb11d8c8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6J2197339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bba9eb143ec871e8ab8a1aa6f3700c5fd6f847ca54aebb9743db533bf7d1a3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZK6J2197341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af2e97a66e10f6e37812ecb75d05e506fbf1670c3448dfbc8f6d16815535a8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:21:09Z), 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/QZTAZ2205085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6680214f30790bab63e118d34c7278e0097e7073c5f96abdea398289a84c0b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWQ2367836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91141152485064de07b2a5f327e230c3b01df3b25634788da9af6f1813b30f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:57Z), 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/QZMEM2305557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67101f8225112644040908c39aedc06aeb949021d56627e9d54f609b145945ea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWY2318696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3756f8ade5ff3eaba13e941b00c90d2593cb3947b46852b0e48d76e2789f5b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:19Z), 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/QZNWT2309672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b55bcce1048e8bae948ab0e07b2af5b92b088f5dafadb34922ca266cba3db. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:31:25Z), 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/QZTAX2301395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d5ab09bc74605a4ed8ca58a8bcb59c607f5c203a0c9c31e21ad46c1f6e25b3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZK6Q2414501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabd17487fb7000ecf35f51c1152016a6ec1a1d20f01992b50f1dd66ad2304b. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:56:05Z), 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/QT6EC2578868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641cfdc5ccbb4983b898d0c08774e64c28244f8f721b3d913df1bd279819a385. 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/QZTBF2341563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfefe31c954ee5f2a3a143be3d7ba2dffa96e335cf7ec208e2b88ca3de5e1b6. 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/QZTBF2341566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ffbbd862bebbd90d0d51302fbeeaf93950b04fc047ea08de21ce8eb54b588. 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/QZTBF2341569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c08a40c8626ae891dc08b97c23693ef0271a6ed5fafde23ef1aca78bcef26. 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/QZTBF2341571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32fea36406aa2e7193bb96dca12d07dccbf05661ce08c321690f0e8d1bb3b96. 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/QZTBF2341572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9782ddf7553fa97c9fac9430d9bbf88475260f80f9c4d17e8aacd9c2992e2b4. 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/QZTBF2341564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94406abd5b1438951a5ab72bca5844c695d981d10a79ef12d4b0975b0bfc76d5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTBF2341565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc724b4a6c29cd199c0724fe9ffbf78b8ce7adce482be8c900de4af978fb63ac. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTBF2341567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178746dd63938458ba347d6404bf1107f28ac2a2c8666b689ce221dc5c38debc. 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/QZTBF2341568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ce24c8bc3de1736cff675f49a6e9aeb0e55b36579a9a0b51b53cc97f828e85. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTBF2341570.