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 0x32b47f57f385e0a89bc063494bd7d1c582459fc42677d4b30ceff967a3c08c1d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3ea77a0-3ab4-4df7-8e7e-e80c3afefc4b.json and https://artists.proofprofile.net/proofs/artist/b3ea77a0-3ab4-4df7-8e7e-e80c3afefc4b.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 0x3abefb72b09162be0a58b08bf5b36fcf24ba6770663216d00822d5f5c4f11047. 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/QZDA71849152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d9611bad2b3aaabb7d9bc928d6f93e38b4bfe4fc17906977a379bab1f709d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA71849157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d536e62e453803c428a9e67a4b8680cb9f94555648b6b3bf8f16225ede6285. 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/QZDA71849158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246b0c51d5802b2fa04169c79802e61ccd064ff67abe0331cb4f2003273f3b1. 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/QZDA71849153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993a077d5e56c3c3e6d72a9144c5c14ca81d605caf65f0c57af6213b8808fa5. 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/QZDA71849154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5da55ed0cc42383da3868ff0fd71bedeba5f817d5b556be47dfb6504562f9b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZDA71849155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e446fe88516da57b082c090299fc577ee65c0c42e07ba94383928faa40ae9c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZDA71849156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39fa08e9e7a2eb433f9adc2dfe16bafedba67306c95c2c92374c4be5d5fca12. 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/QZK6G2214670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c10a25042f6d3a1752e3033058c486b483804a7d45a93dc42d1d53c3f741ce6. 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/QZFZ22105671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6583a1da2be63bf126d900a06f805620368a452042f1e2a46d592bc937eac09. 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/QZFYX1958734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a13900e7b03c27adb47d8e9efe2d6187e85960c7db7d0ddfcca8d95428f5d2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZFYX1958735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1dc9855517e749d0a632ef346c85f8e47346490dd9e4bc85e7896c5d181199. 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/QZFYX1958737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51110cdffac48b6cc9a764754597391da4c4af4c87cdff38d9c446e2b0a3c2. 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/QZFYX1958739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c17f8afa840937bdc91c40352bc3234d7ba4322a5d6d792de6fda62e53c8e06. 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/QZFYX1958736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2c4c7b1d67b88a2ddf8360ac441affd9687a4643d9a541a6e5a231e40f81b8. 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/QZFYX1958738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd477c2e2ba204356024e3c9cd696a01b95027934afb9b76c58b36dc0d0c45c74. 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/QZDA41831985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1cab971751cbab842db1637b74d7e86ad07fff43987f0e9816adf15b937020. 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/QZ4JJ1752236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c36f39be69733f28cdcdba144419c619a4c1575b8bb8c934f63476ad3f7c16. 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/QZ4JJ1752237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b31d8c5bcb5d727aeef108b0ac86d2b81c3b965c48281a3ca8882dd9fe951. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM42K2082468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68230b52c2d54bd1b7b76c695cb992bf73b365a156d4d244355862a2bf155b4. 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/QZDA72065450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853fcb373f4935dfefa210b4c0d447845a4163797d9981aff0ee6296eaae75ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM42K2034783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d17afa0e0ffd4bcc3b59363fc7db039cbe1f396c50e22e1ed7f6e4b1ef38d6. 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/QM42K2005823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dff60ca41f9e494f5d5b421e1f001ca05d38c961640f239a03505a8fa2e08e. 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/QM42K2025761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ce309945f4692508daca495e78fc6dfeaf284161ffefa8e116baf2598a3e0. 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/QM42K2087589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98003c20bdf767e5adfc85842d35ab53c641ae1f6849d4a9b2ab0c597a157812. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM42K2001845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a61629ec41d5bdcc703ccdeb52f4466a009196158c56bf29e5b274fc5fcb13b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZDA72063750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0bac9eb3f818d2db68e92d2a7f33d30da402bd082fa486eb8b8219811f6efa. 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/QZ5FN2304801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecbb48b84c13fdee687184735f4b1ec39bea1c38032df28adc84f373a8b1b47. 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/QZ5FN2304804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab5789346ca47fb2dae6708119c882b4f7aa9f409a080511ae913dc204b7c16. 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/QZ5FN2304809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd444e4f8b91b7acb5e39772150947fd791a6196e543a853da4777ad582c3f717. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ5FN2304830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43358ef7ee094e195a03773d2ee0e9568ab5148231f8026a260aff57f4a2a7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2304851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ffb161321694176e55cd17f80e4051d9d90d97deb836ed85c722f5a6f2127. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNB2006217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be31e00a4a7a15f97b0048dcccd144e7db025274c7b7905b859604492c504b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHNB2006218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f6421602b622ad1cdc0f711e913cff457f6446520b3bfc75a71f4b39af20a2. 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/QZHNB2006220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf269d2aa8f68128ab6ee5397a2832ec4adfd8783575e21e32b43a5b8c2df3534. 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/QZHNB2006223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f6fa95f8774055d4759e017f1032a281588e770e3737098476981226792509. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZHNB2006224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0d6ac69abf778f822f4568a349cdc6edecff18736714fc74e4a059f724592. 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/USHM82095422.