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 0x804c513782a7e7bf1d3f903850dd9ac10f7710c71aa9e0ceead974ff01aa1fed. 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/e5e4ac36-bfd0-44d4-a81f-3c3f9537f584.json and https://artists.proofprofile.net/proofs/artist/e5e4ac36-bfd0-44d4-a81f-3c3f9537f584.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 0x14768029beeb13f8aff0e45baed2c33ede7318b1cc575b876ff4b98e41852f73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEA451204730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0995c9b5357605b3f2853a94f8007cce576005bca302b75f94aa91051da99d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEA451204740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5761be8040b592648c57c3cb72ed241714fc1adbb5aac96482f89e31e51d343. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEA451204770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b754836525f3920297a7feb5e37b4033a9664dc35a1ec608d618a235c985a17. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:51Z), 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/DEA451307650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84927337c3f6749156f8636aa386041f9db69dfe4f88a470fd5e7e3265d04f4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:31Z), 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/DEA451307670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a2ab6b94bb160ae794d1cd639d83a16b4fcd562a5b8d41730a86f655d9675c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA451307740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75570d73a0666d3ed5f44c6f07d2dd047143b653d96746d44539797800efbe75. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEA451407260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a092985da024260d75a80b25d67073828c993cdbc4ebb238ba38da75a4349b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEA451407290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd76780ce544c9535d2ae81fd48bc1ee16657bdf6a7623342fa48284dadcf11. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DEBZ71600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c57d759de747f875e4b523daecfabd6df018838d5272d741292ee7c9fcf87. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:11:27Z), 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/DEBZ71600270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7709efb833e84a1bbe50e1b68e1e9a068ab01b4589e258d6108a324dee9870d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEBZ71600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f34c602cfa331e022736dc4244228ada588652cf04bdf9a96d75374863052. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEBZ71600276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0147b6c497e113bdf4a54a9c48f187ee38b574eaf90cac72cc718563301e5041. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEBZ71800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ed374ec2e8b7aaf566d30792a98f19b77379276227738dfd5974fd406236bb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBZ71800259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ba0af633724421deab528435c3ecb62172640f7f61509106c261709f1ca2d5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DEBZ71800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a0205c2dc2c3c1254c442a2d8cb412d7117d46ef25bacc558e4a83ca97c79. 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/DEBZ71800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f6932b6d657625aa967baefbdd7eb93706ed7ee0345d4d84a97700f229528. 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/DEBZ71800806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1294b2d2177a2a6eb91d2103793676045dad43ad2dcda096b3ba05c4d868affe. 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/DEBZ71800807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e9a8b22273ae7f82a5d8f93b3118279992aad62d10e8cf846318d5df9f799. 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/DEBZ71800808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2375ac5a28292273adbd425736c73293d69dd6c5c12098a653d8b3687d57a44b. 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/DEBZ71800809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa252cc301e5fcd8452da99bc2744c948906e3d941c7d1c1cbb422dd45d34055c. 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/DEBZ71800810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6338997a5dd7b1af88956bd5d4dc303609cd038a1fb65ba2e66035c8d97296a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEBZ71800811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5610f2387f27bca01a71410d48001980026a6d8b8f854ef5851d62c2ad8e7e3c. 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/DEBZ71800812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e177a03afb7a3e18f7f057ea93973e1cb3cc581134edb6fb3741f8112f61e9. 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/DEBZ71800813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d4dbf825a12a55a67fdb41a510b034742a413f84b0ece3be2370d2df44f11d. 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/DEBZ71800814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada56b4ae676a8615945e3ddd19a714d9f41e0875b12dda2cb5ca8f394d3b6c5. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/DEBZ72200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f0fc4e6ec979b68a75b4d3f4806fa9526de5d933af0351936024f27eeaae73. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEBZ72200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0b43ef945a37933575d7ae8999db07484a43385274c308897d40ac89e04784. 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/DEUM71501888.