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 0x7ffe14d7851f1ea82b55f3dc243b36485b2bab772c91b3a9c92b3b76ec5f2208. 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/95f53518-fa3f-4976-981e-1c589d4fa6f7.json and https://artists.proofprofile.net/proofs/artist/95f53518-fa3f-4976-981e-1c589d4fa6f7.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 0x0dd62ff01dbaeed998c48e5d4e426472670ce97845a567ccb9151eaf0a3a10ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5BU1916333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa922d7b432e9aa6167cedfee91f51f0b133a37d9f5b6baddaf79c4c51205a7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5BU1926324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf016d16872727fa6b00a63b8d196be816bc8e6d572714d70080b332ab36f23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5BU1926325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721676955599b0ec709e9dc3c5101415476036292d9c3e1ad5b85d6b7b7afe8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5BU1926333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0edbcb9ffff276cd5ce1b9b204375c80eed86f8ecd4770feef68cc5454b41b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE5BU1926336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7254e63276e318069c0c7aa167aaa124c57558aa54c45844fc9d1fc730d3c4b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE6I31984786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1c5d27287fbf109c1b5646bb3d39c4741c6169301c31f5bcfca0b02cf40a5a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE6HN2036523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103c84da14adbe113fa70a841f649d2bd2d62d3bf3293f9831b6f13ae268c4f9. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SE6HN2036525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea9af9d5bf082793b536410e4952aa5f3d048a7056f7e49fc714159560a5c15. 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/SE6I32008110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726daa4ce61f65d66f87a5e2259a8c25b415bd04cf9af711fc465fd581215fa1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5BU2081759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43cadc6fa9dcf8dbe659be0fe767045a3a92ee09dbfb222f9a18fd3e7219274. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE5BU2081738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3535cf49ddfe9d137c0bea77b32c82bd00bfebd060111adc6140ea2c17920b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/SE6A92077243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774174baf65fbafd2c0cfaa9e746d5cfade901076fa3a553af3023274c920b77. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE6TI2073980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5521507473711bddfb28e38056a76a862a8be6968beb0020042007244a462f83. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/SE6A92108325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1857da281a56b2842552a97c2d00015edc98b03ae26c7d9079097b8b3d4d75. 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/SE62M2141702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e0f3b9073c847558e9320f42c81322f78d87e89d70a9ee7c230eb07fe9f0a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE6QE2249086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b778a061b21ed646d6a0561fdfb39abec53070d56402ba80834b6c3ea01f8c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SE6SA2573568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665980224ec3deac9c93a211a19aa81b0a68430100a5272c7b7036c01f1d6480. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/SE6I32547915.