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 0x64fe9e6489a29c48fa7418c5a4797f9e642fe63bab54a79cb2f636a60c35680c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12a07220-8e01-4a9f-8bd7-da4b25b6330b.json and https://artists.proofprofile.net/proofs/artist/12a07220-8e01-4a9f-8bd7-da4b25b6330b.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 0x9fbfd92b15f21511296bd9456d408ffb4f5751ab33062ea6da607038386c7d2c. 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/JPA969590094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca36fa50131553de30a7c44582d6cf9a8dc9afdb329401c5e46790840a8cc0. 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/JPA969590095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b148b0a8f0b958ec862591e9052b04175cdf9677445bc32874c4c01f3ece4b. 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/JPA969590097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38745e139882e480bf339ca4380f072760767c34f377b759979c05403d4fb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPA969590106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad170a5667472736c52c14d33acaca514968c5140f3c1e1ef4a7b6d2164522. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPA960590109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9254c5d67ff5ffa4dd2ccdb7dd064d72485ff455df60eb7eb5fbceb6a634fc1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPA969590096.
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 0x9a25df4792d22438e25af8de3183a1e98791357ab7d52ba3821ca460d1b7adde. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPA960590445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d641c405cc38647334f9ebc3f29a2c21c722c2b9c6dbc9e1af3261c0bad79. 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/JPA960590446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aced838a9a167c1b0a5a03fdd102cb71c6fb59a25c7ec4494603cac831dccbd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPA960590447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772bae480a73cb88beb04b75e5f14f34b635fdc2b9fd0889aee92c0bbdb237db. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPA960590448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbfe3329cb014287f4c64978e1269321b5a7a04c7ddffc0dd9ee58f4b8587d2. 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/JPA960590449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249d140146885fb6d58424867c6e562d29a291233eb6767484eccbd93216f3f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPA960590450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b58043d13a24fda997dd5453fe43ed484d7dd06e426467604283ffab56b710f. 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/JPA960590451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf785bc4191aa4b0960a2edbb9d692fa78895bb14a31d86d5ba176f745af378b4. 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/JPA960590256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed78224a21ec416f0dd56ada4ff74eb89a2240a2d9b4fbb7b6fe046b5705f76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPA960590257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51a0bd1be4f3f9542c72d970e734f34c6e97b9e7e60b4b873562ee4e9348c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPA960590258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57472caf44b9bb0d2623ba2f0b0ddbe8bbadd4a68a2db1d1409a0ecfa9c6b5b4. 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/JPA960590259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee389467ea92a238fa4bed07140d3945b9a569a501a2b1e4bffb72ff087502. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPA960590260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d0d582c190da763031ed6841cf12e576ef0477aebd252102ceee0de3748994. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPA960590261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1653eaad34f3638b8cdcb05738474882372bcd4e7da37abe04d57b68687d744e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPA960590262.