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 0xe5c43db879e6d17fe0be59aa617e138c98bc4fcca7c4dfa453f870117f8ec845. 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/e446aebf-7f7c-4fd8-8773-3ad5651fd298.json and https://artists.proofprofile.net/proofs/artist/e446aebf-7f7c-4fd8-8773-3ad5651fd298.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 0x2df317b1f4bdc505e88d8cd75fe2c5fe8b81762f69d5b71adeeda090bcaae0a8. 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/QM6DC1994703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed29ef402865de1592aea93baa1f14b9f815b0ef53eb115ba665b227edfac238. 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/QM6DC1994704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec8008e424477c953e55922ed4186c4407972602fd337e3ec9ded85d5296f6. 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/QM6DC1876354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d39a58faa93509e83c86fc884b4429be0e03b11e68feea50ebadfa55b4e6118. 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/QM6DC1692972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061da149622eb39a36e51342701d89f4e4474339c47850cca98489323fec316c. 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/QM6DC1692973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdba6a4d7b04e8b26f059a62f98122a8e7e4a8d60c455c1c5ce8fe18667a810. 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/QM6DC1692974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5eeee1ed256cbb6a2b92a2e7d67ff8a4013e5b809de31cde92acfe74c70dfb. 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/QM6DC1692991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63842ceb8a4714b7f984aec60c4ba2f2de6ae657e9e17ea76f2a4aaf0136f06. 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/QM6DC1531043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529f6ffd8d97ec4d18b1fd41f329824414cfc836a886649b17596412e4d84539. 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/QM6DC1546950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad6f24bea01bc28d8c2aaefffd942efa1374ed02d569484c37f7bcfc243ae0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6DC1546956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077cfd14da8bc27b817da1b548e1f06d8f0421061a77b8f48a16d92830eacf0b. 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/QM6DC1548663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a505b630b6c6e1abdc2757203c898874e65ee2fce857f1eb105bbc4eaae0435. 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/QM6DC1546829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3197a5ac521462cfa0f7f851586676aab6898aae30a9c4e199361765533a21. 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/QM6DC1546830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a20792e90e9283a876c24794cdeca9823ca9639cbeaf61a83cbbfd2d9e9278c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:37Z), 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/QM6DC1546844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c844c4204b6ef2357ff09c262c6f6820a826c598aea0d149badcbc78578ad. 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/QM6DC1726397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51eac7f44c6e1f10c44579a80eaa090286cbf98ad9f3e4fea4c2287078fc43. 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/QM6DC1546799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5efbd2ec1d0dfeb180090af2b3a7f0ba540f7ce2d1f4df018d60794c655f3. 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/QM6DC1546804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277527e3f1714402a6a7209dfe7d081b76b1edf51dbcdaf54894c0150183cae. 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/QM6DC1546906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e5a51686e4b74533ca0918e6b48da90f5e82221d76b53ff0bd28d9d6e9b9fc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6DC1546878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb162252fb8aa5b23e2ba528905c3f343115b43a74326432ea2f567bf3e3cccb3. 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/QM6DC1726362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6617dc1f1ec5fe3b1a3e2a7cf7119fb8f95730cc0f6ed4262646dbdbff5e96. 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/QM6DC1726366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5137eb4e8263f2bb89f4e2e56dba4ba8e5a355473d8f90f85fbe237521dcd9. 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/QM6DC1726368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c32d7979dbad09e556512672bed9cdc6abdea3e7b7621c3cf8cc3300f931615. 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/QM6DC1547694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc3566a76729c092301404d77b83515bbe49fc7e775d91fd59b01512ef2a1c8. 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/USCSG0520902.