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 0xc9b14087e6df9ca0ddcc63221314eb649f4527f926f86e446e486085ad1e3623. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6976834-a7f3-4c04-a211-69eebb033b80.json and https://artists.proofprofile.net/proofs/artist/d6976834-a7f3-4c04-a211-69eebb033b80.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 0xa89ed9180b958407aebc8f56f6bdb3b9db8f6b99cb53418048f14f2ec264d8f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2375770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccff12a827b665ed736418ed9bcec55921451796fb9e5a89f2a64bae3cc0837. 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/QZTAY2375772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d3850fa25466640665f2e567a0423a8dd0938e83826faac0de2f48a8fb61a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAY2375771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cdddd39e04233cfac286c09e7a4951f06e7edb2b1dbd59fe9ad02b2c6aaf4b. 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/QT3F82579404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109ba49bee55bf6ef3d724e81b81de5f632a748fbf001c7002c47b00cfb599ca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F82579405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e10a2462443da37df826da02792b0a8524c1cdaed89ae0d26dd9c0886d87f6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F82579406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc452bf5c7f9eb9aa1b5e3c8c8aa809698129613c0b3ab5055fcc126d0d2dbeb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:16Z), 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/QT3F82579407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c79ef3ab1c84473596468542570774060fbca3142a25be3aeb807c84ae299d. 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/QT3F82579408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a27e5ac5b7cc56d03537d406d6095eca3c1e865e049ce21ab8b047952e7056. 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/QT3F82579409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f14b1450fd7d30c0e4df2683330c3ca8f408d44b2287c08678e242dcf8827e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F82579410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd07df9f591167207e6966d67d08104d7148c776fd535c9de80a05176c85c428. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QT3F82579411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe764f2667427a11b40aae15445145a0abf768bdf737f05b6f6d416815c53cc85. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F82579412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d1070e6bd5b2c9fbd1d12efabfbdf2041dbb8d68574b3497f155c6e1c67ce8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:43Z), 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/QT3FD2563073.