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 0xa6a8a8b9d2d9ac211a92b4ba6e495485ae7b6f7cda9852ada57c3eec2e9c0d27. 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/ab0caee8-dbab-4cd7-b669-cf5d5029bdd6.json and https://artists.proofprofile.net/proofs/artist/ab0caee8-dbab-4cd7-b669-cf5d5029bdd6.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 0x609037dea06d2407c08f406611ccb5bcdae55c919ef71121422c41f0207870de. 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/QZES72405814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0427ab13b34ccf5d44a8138f99618ea126a55717dce5d9ab18de2d414b90a. 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/QZES72405815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6c0555ee10d90b618448b672309167b393aa4ca0f2fdbff6f5c982afb7ba0. 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/QZES72405816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97371569e0df265a4d56b02708a5ec57ee8bae7d0579f957ed242544bafadf84. 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/QZES72405817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d1c857fb0f32a42e4eaacb5414d2ee97771b793fab256d40518a04e562bc2. 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/QZES72405818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac9b0f6be477b28423c53c595199428eab30f82a22ab3ee6dd9dd8694d0f313. 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/QZES72405819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d99387de8105e2f759abadf3ddda71d690d07c21352a4c76e95e4b45c9268a. 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/QZES72405820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd96ac3e14d7efcd4095fc55b6371e03cc86aa753b7266ad0be3bd0e4657bec. 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/QZMEQ2220486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66f76a849057aaba2a057915039bce8db79df8f5e74085d9c4db8034d01d8c. 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/QZMEQ2220487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05330c9d322fe8716af004039c50bcc03b033020787b5baa4d8010a7e398f9a. 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/QZMEQ2220488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91887fc98a65732724c4a8f9a56894fd05a216359f2fb1fecd71cd977f76422. 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/QZMEQ2220489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b96693c5bc973208db0750fed820589c1440535902acaf413052bfd5f89a817. 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/QZMEQ2220490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c24148f4c1d5a3b3030e74e2bc6131a4fb51e6e81777afd15aa0e9fba641b7. 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/QZMEQ2220491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280916a5f9c53b6cf92128e142e938b1e8d5bf688c9d569359e64d6ed2ed518d. 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/QZMEQ2220493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c043069a95623b2f372b073e23d7e541a9e07c39bdb508a49bfedf8d939143. 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/QZMEQ2220494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffba265e4e03249df8b14698fced466ab8e675c068b740d6cd4c737a4023fc6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZRP42204531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f6db619ed09bf6a3042369277133c1fd751e8e27dbbb65c950e69f51b6d84. 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/QZRP42204533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5db71fd512059a1df26ae5cd88ee70d1b527fb3b7d1a20f009929752141a2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:30Z), 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/QZRP42204532.
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 0x64099286e76bf3ee8d7bc2fc0e4f4a7e3e1b24c0c58437dcfad811b1824f721a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMEQ2220492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc662028b7ae65a9373a65ac08220f69e552bb1525d8dc8ba7949b4db26c020db. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZRP42204534.