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 0xe082bd79a2ec9b9527b6df547abe1ac07a087235aad1dac5536f3fad540d4b16. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbcd8ece-fd30-47f2-a3dd-65cba19e4fb6.json and https://artists.proofprofile.net/proofs/artist/bbcd8ece-fd30-47f2-a3dd-65cba19e4fb6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In Case I Don't Make It (Anniversary Edition)
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 0x923b0e7825011f95243538728de9428cf511b02075a30403dd5e5250a92182ba. 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/QMBZ91339137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378b8e25970c7a1f68f8cc30707031760cf6bda9d9851614286bcd293c57422. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUOB11200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56259bc06195896d99dbdf224446513031670b687fcbc80fd5957cf7fbffb4be. 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/QMFMG1316385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fcbf179a77279b3b9049f6f88817876ed2f2a5677c33f43b605e2191bbb961. 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/DEQ121217010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1944dd2d2ba84b2e3394c7261c76331c1cbf0fdd5868f762ad51ac0487a12. 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/QMBZ91328221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e4e4891527457ace246c14f240a69ce2dc776eede9720e09fdc98809ce469. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMBZ91328230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd770a6cc64fb5a5b0e63a6fbd947588b1ffc40bb6edc5085cacc78ca59a4cb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USMXP1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8676489232dad99b71f1ede72e26e4372ce01c4928fd46750a2aa9e2c51be2cf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USKVL1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5b309d8bf5a87fd01f14425dfa1ecc8ef13f41b56ce1ff15513c12f41c8883. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USKVL1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233fca56618bcac96f0d8cc700e43f5a1d2ea3e0cb1b653d846ed15e2235592d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USKVL1010260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c09dda3fc47229866e48ea9aba94e46c8c4cd8f9f53e161b884e3f2fd4882. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USKVL1010261.