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 0xadb8f9c078e7b07d03162d5fa0bb380ae7de93a0ddcc1c9e110c1f1285456efb. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b84285e5-e27d-4002-b26e-663d8c557b60.json and https://artists.proofprofile.net/proofs/artist/b84285e5-e27d-4002-b26e-663d8c557b60.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 0x2558b8d0e95899f2fe64fffe22aff892512a34f76152439e1dee7093c5154645. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987749766e8d5ad06d4df9d5d90717f7b2fc71d6bfb5ee726c9921b8933d8127. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de6d74cfed96ce343acebf3144524b05d7c50436f233ae14bf7290979faaab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ce9a72587f0acb3c71683c02cc58b5659c42fd9f72cbca36bcd87360a1a3b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CA5KR2204395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b7539d1c0c107c68b224f394500b320dc1096694fcc9da2b35cfcf284b6049. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf046d69ffd608b66671ef7dd5f6115cc5d1c6c5926e6f00359fecfd8e856e02. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2204397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f2f4d8c4225dc1038ca9d63100e5eb08501518bdf918d4bcff6402628ea9f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA5KR2204398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55a4e48f1d45bcc004bb16c17fdace1a2683b7e8b63b89d9e53767fdbbfeea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1514e30b8d0fd289b2aaa225214ced641c1552c65958018da7ddb3980987bc1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA5KR2204400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc9e1bbee47b50d79cd26bda1c7730e13537ca63769191b2f112e23fce2a3a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad13301192add383302f83745a3396b52ac2255fd80fa37ac58f3576dc6580d. 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/CA5KR2204402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8134713ad8254251e5f50ae8db952d1ebef737626260a67fa12592533c9bd9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CA5KR2204403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0647b57fa25d737324f82c8c065da3f871cfaa5ab36d04f6637f490a778ad0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e6f0cbcdd04e62121295c77c0cc21c425376499a92c3167ade83305d728e25. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA5KR2204407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e46e9674ab769d71406b3c1c32c1cc22385dd374f29807b5684949be212d62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2204408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf615b51b3b4ef935882d1e4b2b8af670828b8e03ca6692cc8ae8669906b7cba8. 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/USUM72007194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6c2c4c6e3fea78ea607f5c62bd2f892e4e81d2ffdf656870eade9902bffb8a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USNL19600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c315b8e697a0257c585a07d52d8b2f3fea567102bbf7a7ff56801590ce7d5f8. 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/USPO10700102.