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 0xc90bd6ff2f88f0d07d71991505781787a9e110a84a01d33666f5c1a6b1b3f56a. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fec580ce-064e-4813-b345-ca0ad7225d98.json and https://artists.proofprofile.net/proofs/artist/fec580ce-064e-4813-b345-ca0ad7225d98.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 0x92cdc88ac87d3e13d21ebb56595cf2fa4289719fb8a3c13a6e9f91a376619872. 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/USA2P2244825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6ee1623a5ab5c857124d4814de4ca521e0bb203a785f687b98c9b46f60e670. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:18:42Z), 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/USA2P2244830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377292e445f85c6e73cdc680375310ff4a2247cde21de436c6e4393f42392b3. 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/USA2P2244828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a46079981051c0fbbdface73d5cb2e7a14302fd491e31a0977085d2b30489d. 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/USA2P2244824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3eff756168fe34db79055d996b1672eaa35809eec93d4454ed0249175da301. 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/USA2P2244826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47773cb5b9bcbaeae34449fe33b716fb4a642f7e35075fb9bf1ef84cf6bc309a. 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/QZWDE2334337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd136285788d1eff74d4947610608cc734dc04190d9df6075ec255b7144c28bef. 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/QZWDE2334339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96844c7f32bd0f6c55a6d36a281ab5a7b2b8545892265cd734a88edf1489bdb0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZWDE2334336.
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 0x4e4aad5b01cd0519b8b37404681225465dde08ac6c9122b8fefc2c270ba91008. 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/QZWDE2334338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf811718042fca1a6e56b21c407d7caf2e45fb12c7e114d589bc2f438928e3278. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUZR10700571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf92077d273b0ecda2d018155e21394214c124ce551cadf31f7e4c3d50ed75b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUZR10700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c869e41806ffdeec658e97de216b0c27d9c2f6accde7e60f56631dab8e54f5b. 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/AUZR10700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb16b38b25e8010505014e1cf125a44591a8cfbb5ff1baab1517316268b9de4b. 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/AUZR10700575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d26053750999b0c26528c7b9c033f5fc961c9ee1df7ef04f948ce919d5513c. 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/AUZR10700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7d891702a59ca53fd283e2eb441b89af077c2b39aa24702be7e4411c198732. 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/AUZR10700580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e9a91393ec8df678f05d0297d6724fac4e2bc97989958f9af499f1b5d0b6f5. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:10:39Z), 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/AUZR10700676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b06781d3d9722044049e3ce923f76e2eef98d44d83ac766b322291afee7488. 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/AUZR10700677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79d6831881f5cc10548c7f9f321d20dc7d4890af00eddbe383f0991ee59f833. 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/AUZR10700671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f841dc1d923d998cee29e605c51768a5688dc14944ee58dd61b44196ccd7a16. 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/US83Z1777299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b435eed264110cdbdb277243e19f2938527be5598a5f4c7e6841030ac53ad. 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/US83Z1777301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0793e28fea7537a587f083a157b8030c446129dcba1c24d22b0581821193eb3f. 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/US83Z1777304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bbeda20871385a874ca25eddf6f56123121dbdedfda096abb01ebc065fa4e0. 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/USA2P2023621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f64359b301d13938f2cd0846ab5f7a92c9863dd682309d9d96ba246f682429. 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/USQY51733078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32a84fce011a94587203009367284225d13c6b1c19dc3f1839b780c6c7ae3e6. 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/USQY51733079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18901c89779eeada596d9be8dc368b56cb2d362e39ca93f54a07424ebd3e672. 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/USA2P2223307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26123ab4bdb8a91fc3e672a3b84ce061d0d039e49d54a168f37b528bc8cdee. 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/USA2P2223313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0912a54489815481f2cfa2b68a5a767119b48cbbc8c5be2dc80ad859257f5aa1. 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/USA2P2223308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d64b165e454aa4350c0e79949f1806eede22cd0d6933f40bf36da4383b9f9. 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/USA2P1915477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee36e7a9a18b326d7f9da1e72dcc04383e7accca30a9ce115eb0c40fadac2fe. 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/USA2P1915485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d73205c7e8c3a259bad405977c7499ceab07027e2868adfccdfc646316efba. 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/US83Z1902673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1b9940676e7b4f4074713268e6f1c1b253a27c350e41315b2094e780273c28. 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/GBKQU1840115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8106ba02e0c5ef2b6102b4685f26641cfcbc9ac97886251363df00e502ec9008. 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/GBWUL2002771.