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 0xcb54cefff4797a698565a3aea2f4a3ea04af48318051193bbd0fc29e8fff1c72. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4b23301-61e4-4241-81e8-5e0d565b400d.json and https://artists.proofprofile.net/proofs/artist/c4b23301-61e4-4241-81e8-5e0d565b400d.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 0x0d4d9c57a0ec0a7e477ce10f833358bb8c82906bb603340bc0cd7e4eae8b10fe. 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/QZWDE2258679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f872bdfc37c0960c56eb16f2140457ee8679314103a8fef0fca67408b9a6f35. 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/QZ2J21505696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b334e264ce8e74ec0ea49f27100325fa4815f7d888a2d9c53210bdee35c70. 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/QZ2J21505283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373b8e0fe820a53c8bc1c540c1fad116c40759fca3ab0bb3e23f7ca6a1154a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ2J21505151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ee971a0b2644e725110179bb3b1f588be46dc9042393f845012822a8fff2a. 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/TCADT1855987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ea52fd1837e1dcb630090f380d9b31fb87c23e4e81d0c82039ad440785d737. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZGLS2046712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1398c71711d5f77bd1903b142184cfe041bb64559298a77fe8471ad93782c4. 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/QZES51859993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff89553d012384c8517527be606fb12c0d8710200ec6d93d89c6c43a8473374f. 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/QM6MZ2188621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d9bccc77d6a003cbc33cc58cbbe44a6f6b1bf5770ee0c5df601ceed37c4b91. 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/QZ2J21505821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874035e8df5429e581c8ed29e377043da395439a35f138771ef7198fb03b5222. 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/QZ2J21505822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51638bc693982e60ecb5e646a00b6ea7047da71aa17fc7af834f20108728b2d. 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/QZ2J21505819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5eb666bb03f4bbbb58a0682c50cdc14b5cce2ac8cacb04695da386fc238093. 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/QZ2J21505823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e508ff37888faa1a95c427880e173fd7991d7ad6af60c5286dae13bc9d4be. 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/QZ2J21505824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699f5c6a75f34ce25c35a58efbe7adfa4a0281fa5d33ce46c99a9dd1067314a. 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/QZ2J21505825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7410a94889b9bc2766a705c73173c7b8de3bee6856b3652ce60fdb00103477. 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/QZ2J21505826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56fd4aa07461016da7567e7685dbecc2bf7aa68d0754c3aa078f707c9e2a8e2. 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/QZ2J21505827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36972c8afb181017f9e3b84b22ab9ddf2692396c8427290cb3bd6817f7f9518. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ2J21505828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f366d626e7514d801d93331307b4bd31193e3d982ccd96f5263751a43299db2. 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/QZ2J21505829.