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 0x6b7c02e7679febb5ba075872206055a8b8cfc9b56fa36a6c6ee4c0e9dcc5d81e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72850d78-21cd-49c2-bf0e-f767c29e55bb.json and https://artists.proofprofile.net/proofs/artist/72850d78-21cd-49c2-bf0e-f767c29e55bb.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 0x04667f72ad4d3d69ed52babf38d7d4842dfea65216519446a848fc44706ceeb5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:21Z), 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/QZXLZ2510031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4addbd9eee6bbf0203ea65afdc42156cf0003b76103797e314d6cbc1c29699. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZXLZ2510032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693e6ff38f8214557ff324f112fa0e315b5835a1b384e58da26bfcede477538e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZXLZ2510018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb240261e618284768e8ad897a2441cdb056dd922cef2159a20a211c8176a5cae. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZXLZ2510021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096bd7fa0693b9b497a393f717c6a0e537464a26bc7612fa3574898b2e44720. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZXLZ2510030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04667f72ad4d3d69ed52babf38d7d4842dfea65216519446a848fc44706ceeb5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZXLZ2510031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558392a3ef4b2eb3bbb21dacf0fbe26b4fe6b823e39610276f2a4cf577d157e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZXLZ2510022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb240261e618284768e8ad897a2441cdb056dd922cef2159a20a211c8176a5cae. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZXLZ2510021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558392a3ef4b2eb3bbb21dacf0fbe26b4fe6b823e39610276f2a4cf577d157e. 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/QZXLZ2510022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4addbd9eee6bbf0203ea65afdc42156cf0003b76103797e314d6cbc1c29699. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZXLZ2510032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693e6ff38f8214557ff324f112fa0e315b5835a1b384e58da26bfcede477538e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZXLZ2510018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096bd7fa0693b9b497a393f717c6a0e537464a26bc7612fa3574898b2e44720. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZXLZ2510030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b4cb7a51f5506b79758699d57ede443e574ea70a9515d5737c6dc556344e4e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZXLZ2511798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b4cb7a51f5506b79758699d57ede443e574ea70a9515d5737c6dc556344e4e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:26Z), 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/QZXLZ2511798.