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 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 0x2e0280d98c577f002494f7415973efca685c81a48363b552325b57694f01cfc6. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45020f7-2064-40d7-aa59-2f3da48dc63d.json and https://artists.proofprofile.net/proofs/artist/d45020f7-2064-40d7-aa59-2f3da48dc63d.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 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 0x1dc5cc625b911e113c7058c99964a73020069cdaa80a328469908568b91ea7e8. 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/DEKV21802274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86101ed8fc279b3c14004ff7dc24b3da3135a6343442c529982b8229a8838a9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEKV21802315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dbe8b22959e855d5043d08468db3638f03a62963fb87789bea8d6f382c1d77. 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/USLZJ2488996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68a9bc2737225275ffc477764f3c7d2f5db4b221424d4c1437302bc576c740. 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/GBRKQ2459627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a709bf6c8c20a492be2510131e0862828a4a09c0e9c14bd361b78dddf6778b. 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/QZTV32449785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fae6b1e07278c565cd7bb7a1eaa9ae3aef1952d469da9f11f81d00069936d7. 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/GBRKQ2459595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34065513b2940b1c6947f35e57cfa24bd5e9234d457a8a4c22d0dbe0e5e2952c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWDD2444494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816126f6bc2ed4fbd8fc4a2ecf42dd78743e3d708647f7cba78a468063c750f. 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/QZWDD2481096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5e8015a11e9cacaafeaabe2a80270576dabf9db3c14ab4f3e49d6becba3d18. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKN6K2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3816126f6bc2ed4fbd8fc4a2ecf42dd78743e3d708647f7cba78a468063c750f. 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/QZWDD2481096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaea525a9321c4d4930932fcb5bcf32d0f6ce5d836d01e0468f71beb56ab8b7. 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/QZMEM2220472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0247ac883779e0d4ecf696f39f7841cba1648106c8b5ae8b42a6d3c0b53bd60. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGE2236596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05737f9d13c481c0cb98dfb097aed1e1cd672370be32868d89f993a45a99a25e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2224591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ac33b1dc8cc9e4c945e5c786d7575bb5b146f943b8fdb4b7af385f79a4676. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZ5FN2224638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2401c3603e5379d1cd8872bacc1ddba20d4bd74891f1687772b81c2d85458619. 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/TCAGC2202960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf870cd78539943e4f66311c3082b5ff6ee7de558e67cd2be242a9c3aabb810. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USY252035404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ab73124da739db6dfd2b3db46056ad045375098d0e93a26c1a8e93881beeca. 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/USY252035405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d73fc815522c39baa56d98dc97ebedae7255ee6af50794a0b416915275d652. 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/USY252035406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c659816419e3815318b1feb4883e25427527518dbd8b8b2455f340409efea3b. 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/USY252035407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b29e94bf64540f34cbfbf11a907a476393a5e076ca434cd559adfcb693bd03. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USY252035409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3464fbfc802748c3a54cb707ed17ecd5f742cb69e0229f9c20eb2f762516cd. 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/USLZJ2221858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6e82a287eeea18a5703095ea3cba4b7a6ae2ee701e3c611271d681bf0df42. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DES561911202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794eb0e1f1e42e13d2ee2639ec1891f9242dc0239864f2f2ecda8b4f6d15ef4d. 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/DES561911203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bef7ca8a85c7bce60b1bf6c03bcbccd6c3d7967f5d0a8446c76c22a80a3838d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DES561911204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed8a4a65a4f76a253e17d8e9c328b6c4471f58b4b82c28991bfb94ba86f111e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DES561911205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a4aaf9aa16b7ff64011dac00b082c2715500bcb2a8ae163b60f74df89145f. 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/QZRP52152848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1075b2332bd864c1e021c22650d3c719e97e6fe63a6866a1c7531cc4517a9b5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZRP52108247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40404360d83eafbbc6585b6f62aa1b0ada73d1b793162f9a511174d58618832a. 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/BGA472217311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6a09e900983b815f6a3a5dbd71f55f1813765b75022179a744d398e104552. 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/BGA472217308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f555102f6ba1c87e5dffa50701b64db637afac87f8e1b0d9cde61bd6009b30. 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/QZK6G2130042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2047233d585ae33453b044dae39a7266877a9141b7e93b46f23d902f4ce2c90d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBRKQ2459438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4c0dc83b6663ae18a323f1921af4dc11ade52bf0af16f954518c4117ca0804. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTBF2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62762875cfc883c01fa0c51910e84ac18d6913ba0c53345ec6636c5a1ae8f2c6. 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/QZMEN2138181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ffb2a60a9961d73585132751aab1609c85740ad75c663915c12f7d3ccc110c. 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/QZMEN2138183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a577594f61eeeec144c0cf9a95392f73e2a51ddcc447aabf6ef2468bdfd3cf. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTB82208598.