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 0x69e97fe059ba9aefafac6a03df99792abc8f22e3ecb330436936351d1e933fc1. 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/12f1abdf-bd1b-49ea-9df6-b66dc59de498.json and https://artists.proofprofile.net/proofs/artist/12f1abdf-bd1b-49ea-9df6-b66dc59de498.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 0x8f1b58bdfb7886027b230042a92589262aa606c3efc1274b5041ec33eb46a500. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYX2095609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6739513b1c1cebd5bc6f6d660de074e09f935b2375c033446ccf5f816ceecf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYX2095610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb4c110eae7710e91f7f2b0a35c7d1bbb791410ba622697c0b186f0f88f135. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYX2095614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37f290c7c5d984da077d45b753831310262a08385c5a4cb625f4026325c744. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ72092359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd148840d007408ead0cfb41209b050f181920c20589ac0cfa9afe32b08b5b5. 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/QZFYX2102460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b6fc359c76f1a10e30981f94179b4923f51e77a0beb23c419eda225b528b94. 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/QZFYX2102461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63139bd6bd812657882796d8797dbd03471f7d09569eabc6102cf58a4bb0150f. 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/QZFYX2102462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594722fb7f5f608c04a5ed01a53c3c442caf48c7893ab19507c0c494c56112c8. 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/QZFYX2102463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c59b5e76eac84ae954864839705a929e22fb96cd6ce8218e0eb82e7772e5e. 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/QZFYX2102464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550c33ed53c540f7f554d661a3868c05a423e1ac81e0344373d7c47d8295d1a. 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/QZFYX2102465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e41d4b46014a76e7c639b86f71eb7c5ff54c5dbfbb7473d09e2fe7fe438ec1. 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/QZFYX2102466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a332dd48a61487b5c0404b58c8cb57b9cb70ae2452654b6c9ad165ceaf27f4e. 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/QZFYX2102467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d26df926076c9548f6048ff6def56701c1697d0bba3957f2a55cb74c5d0728d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFYX2102468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca228a592aaae6763dd3dc7ff6b9f27b99b092da2520f012737b54b0d03171d. 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/QZFYX2102469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ff8d9d7d8e6bfc42d081f77a02ae6e9c6c6764297569414d60217bbca79339. 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/QZFYX2102470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd7a3479f512bbe0e20c304381c8bd1545f8fdf64102422702d171dd6257e2e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN42184868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4ccd0596c9efa3ce6bc00fbf8fee9ad677e8b7f49d629326c2a078081cc84e. 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/QZNWQ2323044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445016363f00bf367f2e4c5f961ae38ee2f7f7b10c7e491a993a9e898c7cc30. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFYX2503903.