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 0xf3f1f3c695770b8d09c39dffd0006d5b4eeceda96b74d55852416e988049d1ac. 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/a3ab63d3-9cd2-4bb4-afea-ba7ffacf9ff7.json and https://artists.proofprofile.net/proofs/artist/a3ab63d3-9cd2-4bb4-afea-ba7ffacf9ff7.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 0xd994ee1b3b414e25c4eddd62603ed1ca223de19a0be61b7d70f5a7fe4d897704. 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/SEWYX2100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6911d157b4be2b677390a911dabdb8c71f52d087e1b8b744dae327a8031de2. 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/SEWYX2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fbfcc04958cd7609a56dca358e31aede30a0bca184a164c8ddf3f18bf1257d. 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/SEWYX2100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fcbbf74d65859318e013a8ef08367fe642e8c62da471d4ab500617c397b1c2. 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/SEWYX2100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80630587212ff55d49730b07f0d4a3cad8eeea270cb57e90b0ae1035d112d74. 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/SEWYX2100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277f17311a72a035de308ed47e03f7a00a463ff3a47b95317b88b86bc14fbfd. 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/SEWYX2100306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73788e8c06232220a268dbdba4defc162be16b752002f1bcb204c5478163b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEWYX2100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4594e7c2d5f408d5a5b9a0c2f417856ae22646d8328b63e144e0aaa9b9356d4. 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/SEWYX2100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77103c829e6b3d36a3700127d7267c0ebe76ff64d91b18039a55c757deb6b134. 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/SEWYX2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13bea81499d9b9be9fa644f5154f2ecc259450b1fe8fa534033d034f2567fe6. 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/SEWYX2100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5d51e7eb2302000694d15e087265826d662158fdc8b89244de8bc531cf624. 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/SEWYX2100311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd58d3207adfc881baefaaff9592a97a2e8be70294ecc5fe6d90aa41efaa80. 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/SEWYX2100312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c146b4caed43a6c2efdc45657e2642fd0617f324b7c20d37c3f60fe965204. 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/SEWYX2100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f0c8bc1b6f51ec69e4d729d70f2ca3ae6cf22d9545c5a1936a4da2a0490df. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:58Z), 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/SEWYX2100319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048c146b4caed43a6c2efdc45657e2642fd0617f324b7c20d37c3f60fe965204. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEWYX2100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdd58d3207adfc881baefaaff9592a97a2e8be70294ecc5fe6d90aa41efaa80. 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/SEWYX2100312.