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 0x4a41c05091750b1aafa3244f71a20fde6d79a85b72cf20a7286b964af44f4359. 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/67b042c7-ab80-448b-a731-4b24c1f6efeb.json and https://artists.proofprofile.net/proofs/artist/67b042c7-ab80-448b-a731-4b24c1f6efeb.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 0xa88dbe3fcb881c76c861364e1234e6011aede5f9fda897f25162b4af5a03f439. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:33Z), 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/QZNWR2098149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dc0fce213305d0720ed3ce1007fd2c4077dfa943bc7800633cd129965b96da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72106532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651a483b6e7673c41e2dec4e1153c284bea6b13b4f2171db6e1c47e11e43526c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:42Z), 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/QZHN32148595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91517920d38cc95930c472ed6a98584e6e1960981e215349f88eca0df2585eb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32148596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21831d45436ea9d02c745daa9e5b17b9df3b4199f7bcb61d9b5f4a74bc40216. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN32148597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad9b596fd6bba497a04f82ce1019a5ac5528bb757c39e9d926b64b275d5414c. 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/QZHN32148598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6054d1ec9dfac333848a1721bc76b64ad7a28665dc612be8db8d20ac94d0fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN32148600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd37fcbcae1f180546a98a67541786ec99e0855b2ab7d2657c12421d1ffec220. 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/QZHN32148601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b502a93047dc58b9934864c9c94303e230c09fe9332fa3f6f57280009d9fa8d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:04:46Z), 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/QZHN32148603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d64aafd1596fed349ae25e55628bd76b45492e372467a2142bb5fa65d6f636. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32148604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0cea11cb62fab0660ab108c3593872038ec665b754c84e788af68c5afb9f7a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:04Z), 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/QZHN32148606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66d0691803c38423906acd6c5712cabedf6e646382e69e08d0ce343976c3ef. 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/QZHN32148607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fef92a0c65a007b9812d0038fbc1cf4a9c997fbeaaaf621c61caa622646ef7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZHN32148608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85072c0014a2f271c7ddc121736d4e51b21e2b44f3c7d2206a28e7dacb1249f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEM2122584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1483fd4fd5d5f4782cf957bd8b76169cf06f4563bec78880201132df313598c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:51Z), 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/QZPLS2194295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aab659f223ea4ac693e24dfbc6225535330b5c86c4accf111972387552c93ec. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA42214018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04006a0c37500b4d34bcdc32e9bddb756d8fd441f9a456bc9a030682dd05a777. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN62253492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe548aadee7fa6a328408f7e2e37de21b659b976979dc571fc08be855179fbfbc. 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/QZHN62253493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5cb2b0304180bbaf9b1a314692fb3abdd3d034d4adeef317ac333c6a80b019. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62253494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49fc8688fb1c4d891b03fde7187edfb743e2605bec16777ba0ea4caa64dafff. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN62253495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3fc3c23980a278fce5668e51816d11be7fdf27a542562ad39fcba5771a794e. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZHN62253497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b27a457db548f85f6776d69d26424e38a9a042f72d717c66df1410c420abc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN62253500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c435716b6cd0f7e32d9b8405069dc88b60d8cb13c3ede2230ac1e7a93c1ca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN62253501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06d427f074912e999dd0c746557e46bdddeecf50b5725079fd392afeb52707. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN62253502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52ccda16f07ce5754a001c8626c852f1de6519ef0e08f8323c3d757e9d133f6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN62253504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c34ed68a07f759c1a790ffcc5cacad4bf0c9533dbd4e391567913a0c84baf5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:49Z), 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/QZMEM2228085.