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 0x134cf5331e0af9da9601a40e4272cb5e031f907a35c746d1d52468e1a6b31da2. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7ad1038-3eb5-4f9c-97ee-17733d4d7181.json and https://artists.proofprofile.net/proofs/artist/f7ad1038-3eb5-4f9c-97ee-17733d4d7181.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 0x4bbbc3d6c2b5d9e35fe03b36e474e5afe9186326d4fe2b0270d93bf6d191a68b. 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/US2S71740001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2575e3bb7bd3bf41569b3ae98e043776d57c6841ac9e1545f614cb3ec6928acc. 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/US2S71740002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb050b7242697e6ee2d4020be090e18f1dcaefea3d9e96385540a650a52429656. 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/US2S71740003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13151ef1152ff73f17ab6d096de7dcc64138e8b75feb22fcf9b74ac5885bd3d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/US2S71740004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d849ea3a53e75176ff919f8b4c601058fae34266919f8cc65f8292f9a0e752. 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/US2S71740005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf200f4dc76d474add4bdc806a88dc7353781f5d9d299dbfecd1434663d33e98b. 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/US2S71740006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc050aef07e7430160668317103aa663a6fd50009fecfb567fa399e9373cc59c. 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/US2S71740008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea05efadd6382c01b716bd88596f6b84a59827a2643535b6af27ad855fde5ae. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US2S71740009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d851dab8d73d7dd0ef6e94430172666a3f29fe3a7d3fdf3c80af99578b267f. 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/QM6P41842793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c3a04f21b9d0c0b49bcbd61b0d8ca08745489dc5e366dee40bc84c9f822b9. 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/GBRH31200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323cfc7c19699eb18aeceb7c70fe92d10b2dc4611619270acd2fbfb651f32b34. 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/GBRH31200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f83880eb3f6734e14323c4b1a3dc13744fff241c00606ee4473b22d02d5ba6. 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/GBRH31200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60dd717b516ca3e118016196f3d6f25ad3ae6d147a705fee13ebfcd9d3d086. 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/GBRH31200562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28792ae78e609d8c6f5c04c709cface87f49c7a73cc55f5774df085471cc1aa0. 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/GBRH31200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a552c12a2661992a6c313700ef511d3521a11d1d2adf6728187aa56af863fb. 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/GBRH31200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7d8decfd9379535d66b5a17062c8b27911b07e8ee90ceb9d278722ccafbfc. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBRH31200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b476b62cc5aaad02ca6117617d7168ab0872275352a27532d4e805f56236371. 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/GBRH31200564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cb120ed7f20ea30695309074ea6aab2d88c499dc3e402657dc5f709651d99c. 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/GBRH31200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cb3c5d24c50a782bffe92e0ca5e7d5e2c2c9da2acc8def2ae8c61cfd044ebf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBRH31200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b24425799da4a20fab54a81f3773818afddbd5fb51be20f8538edeb17391aa9. 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/GBRH31200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419410f25c7f56fa5d2f164f12ec56ea99e3e79704dfd30ce3094cc348de4413. 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/GBRH31200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c3a04f21b9d0c0b49bcbd61b0d8ca08745489dc5e366dee40bc84c9f822b9. 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/GBRH31200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a2a62989dce814a62fc7c511b65a972426742925034dddf6db668a5656e0a. 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/GBRH31200568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c0abcdba29ff7a3f6ac876c116e34ba0c2834b3eb3a952ec38d43b3d2412b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBRH31200569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca83236b59700833abf4660d97d665e5eee66e954591e202abed25ae1c3607. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBRH31200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93823ded7ee151a807801b801e5fa0c4d30491c319d4905817f6ebf954efec48. 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/GBRH31200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02894bbb862906bbfa6791c29dd4c082ec62bfc510182d022ee2b2bff566126a. 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/GBRH31200238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c17f18ff3da1285f024ded667fb0979f6da61cbad9289688c9d41b41b296a. 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/FR8GV2257220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24edc56d57855a0a2fab37d08331dce3d600f2f52bf79022d26091b65d896f90. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR8GV2257240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547c8ed122407c2c2557dcf88aa990926e19342beecbb0261507cceffcfdc549. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR8GV2257270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf305b897c81dae383d545138b4d752491ce7be4aab3e8b2a1bedc9cddcfd3a68. 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/FR8GV2257310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a6360e7e9162eb17ef33370302510042bf6b8d8ada5f9d2b692b6c631f09c1. 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/FR8GV2257350.