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 0x0d4107a19bdf0d48d703e7f132cefac1a89506315e24458bc56254887889040e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7849e4d5-6229-4ced-8c71-72f696c70b4a.json and https://artists.proofprofile.net/proofs/artist/7849e4d5-6229-4ced-8c71-72f696c70b4a.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 0x5fbc0dd5bb54fe018233da0bb7e0339dd7d06609019b1131747f99bebe269fdb. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZGLS2340098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e7881c312e4f156c52de1ac5635405c17750924b5259dc9051f17b0fec7c6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZGLS2340101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f589110d8b74a02841eb839482c01aa7ce2532fefa6df780d4a5a9b6d5a03. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTVM2409512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1c774b08928106ced1e63e0ec75438c721c89d91718e7f1e72a44ab9218d1c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTVM2409466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811eea146af1998eebfc929343b159f8f3897c63f47229f628a320a12dec2a0. 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/QZTVM2409462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3ab8821dbedc4d26b8041b8edf5e135152d167b8fc28020b9c15b5d9f28803. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZTVM2409453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1689535e953b80b49382aff08a876c634bdc34cd25b24c53a6873c7a2f64b936. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTVM2409448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3099d5370eb3e010d9652b25612d4fb70e93928fe68786c34e08367b658e98e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTVM2409440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfab552256c2a2c3f649acd80d636d83ce7b8874b0ab1d0af294e8be7250e91. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTVM2409410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cdaa47bd974d0d53b8aed069ddf39e7047495ee1eff63f2aec95570a1f5542. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTVM2409349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eec4a53566975ccf993fea9a6afed4e10a22516efa893175fbd9970a45eb42. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2409322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162f760d2317ecc65650f0d2f1021294025b6567c2f29fb7290dd9e7d6ef6733. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTVM2409315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c467733d388211ab101662679f89df2b750b4e98a87492f10c2cb726b5f1d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTVM2409313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ae97d97ac8c110f768b26dcedd1815fedc0a630ab6045db2e9672ce44bc8cf. 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/QZTVM2409274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c7896935c4d5ae461e20305fbb10ce89a86f3cae02a5cae641cff5b74ad09f. 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/QZTVM2409268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42274ed44feaf22625b347cf8f96b0ddc5d322730e15abaed5b4df706b03332d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTVM2409265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40c04cdc0328ecf984e00b7bcac2f5bb8d55ffcc42a60512d2b4ef3c0aca7d9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTVM2409254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96febc656f21124e3e03035f6ca7b86954ff2ca9c6f56e10a8bc8a5a140cbb23. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTVM2409251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea016d460fb09a8e2e3bb65a61e8dbd92a84bdc722e726a03ba14e9f015e1a3a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTVM2409231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1af0f46dc62f3a13cb8c177acda680a21c86b8e4d91d31a7e9ed027d842ea. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:43Z), 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/QZTVM2409228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6878ed3544885cd0484d859e1be8421df2b1a8e03b133db045d2cdcd4302a9c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTVM2409166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f256371f396e3336c494e5af8a8f95f3aa6ee8f4f041dfeaa5c620b45199c9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTVM2409160.