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 0x830135bd1640325b1900aa976365b23aa3590a1282d123d5df6710fad75a0168. 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/24a8b670-79a7-4d6c-94c8-d538a410abf0.json and https://artists.proofprofile.net/proofs/artist/24a8b670-79a7-4d6c-94c8-d538a410abf0.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 0xb9fb24bb942d787a0e29a85f40d1a466c386e1a47b645b3948bc834d20c5def2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QT2VB2424878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa297b6054aa96ae535485bb8957d349bd37527474e29c764312139564ec21b. 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/QT2VB2424879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf69f972504eb9e2c6f2e96481326eba08eb5e03167de7d6c0e0a3ef08b793. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZW9K2382672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d81bcf437b861da444333d0e177fc186bc05669d2226ff7aff0a3498e64582a. 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/NGA602300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193c971378a608f16e8d11057e56aecc3c181be1257b844955d2aa8cf7594d78. 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/QZTVM2209650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7d622ec9ca1622a0a71fc709b0b1222e3091219ebcc8fb0be64d5b5a32328. 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/QZTPX2128885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25048dfd6c55ef89715dd6aa9f68c98cace869de0cf189f711c23fcd4a3441b. 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/QZTVM2209653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ddaa58b4844d6f1141b2225f94a4f7438785e4905b212f9f3da57231d6890f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZTVM2209649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd7df69a42ca178e9cfa6f87d82d222b2f511f974768093f94d2700d145077. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZTVM2209651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca725af8b3ff922e7a5954a11a91a309eab883a217665b8b045958258a71d145. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTVM2209652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5638e43ac3b0551f2102ec8c4f52bc8c40945a0135b6f693d1e1007e7268f183. 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/SE6XW2229595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46acd73da9235c36b0d4c3341c80eb6a039271fa31398d2c1a7ae16515684f. 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/QZHZ32258109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258031b23df8974af2f926b9e2954c16b5bf865de778d21ef821c35743763e87. 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/SE5BU2215656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7d622ec9ca1622a0a71fc709b0b1222e3091219ebcc8fb0be64d5b5a32328. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTPX2128885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8484ab118aa8b5456f2f41692e1e6c6e1384da55dedeacd87bff4d497cb4f571. 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/UK43Q2114022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79ef6af0d62f7d8a844c3f4d4d23fe6ae783a8d5ec6d09fc7f007e887ccea53. 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/QZNJX2067333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9859ac4c5c7cd23e391201afe2a4e35aa5769c556363ec8f1736f8eba7fbb6. 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/QZNJX2067334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364b43426dfd92dea00db40b636a31b82c1f857f773db93c752901e1c571c26f. 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/NGA602300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449c5eb20858880a5516f01278953b81873df6af6e78e0a586d966518b2b4759. 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/QZNJV2256619.