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 0x3385660e9169f69b0297c26f0c161a0db1e747902552d88d76791f57ab8e8c9c. 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/1779c0c0-1eb7-498c-bbc9-bb19ee730b3a.json and https://artists.proofprofile.net/proofs/artist/1779c0c0-1eb7-498c-bbc9-bb19ee730b3a.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 0xd805c40c613d223e6690d6d3ec5edcf61d5b8db51e0fcbcce88a2827a1302a86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5BU1785108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14db4eb501d194d2f933652e03924ea77ec1f581f3a7ab1553d5f4db37e074. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SE5BU1727335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14db4eb501d194d2f933652e03924ea77ec1f581f3a7ab1553d5f4db37e074. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE5BU1727335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd805c40c613d223e6690d6d3ec5edcf61d5b8db51e0fcbcce88a2827a1302a86. 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/SE5BU1785108.
Hemlisar (feat. Young Earth Sauce) - Young Earth Sauce Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24672d33f33864536c18d27189cbc7991fc5becb53d2b7ad25cce7494b831763. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/SEBGA2203225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf01294e62826e01763e90840e0466921d45b7194fb6ef9a6b2e79ccf455ffc6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:41:31Z), 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/SE62I2200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998e592099c8afca78f71ff7c9c381725a89d864832ef021d5e53156aaf09d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE62I2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c55218931b4dabb8c9938f3ead6b25a1f3528e0b33566e7d24545b82ccc290b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEVQI2408001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8274531618880137d05b455b4b749a019f7db1218e241e24895d2abe838d490. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEVQI2408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8274531618880137d05b455b4b749a019f7db1218e241e24895d2abe838d490. 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/SEVQI2408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc610ce182b977770f66267b22a5d6aa9b51205b2186e30434088395988e28aa. 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/SEVQI2408005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5853c884dd0e35ab41055f63abcc67269a3babaeb5c5e9759f8e903b445aeb8. 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/SEVQI2504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7375a2fe159759239094380c5a354bedf3e5a6350c0059502f5823faae59ba. 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/SE5BU1780408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8cd72bb45aac2d4f9a9d75c10649d20004b7ec9d69ce44e7db9e61dc9a028c. 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/SE3SA2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32b3528b033eeacf41eb553fc5922f9c35c2ababdda54a0dd9df8f38eb9461b. 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/SEBGA2304128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86045158dddae81db2a04df6a7d6dcd18165f5f67781f172f3823e86712aee83. 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/SEUM71600812.