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 0xec89d1587abf31764f4d627c993261aa1636dac160a435dc72c75dd69b01bcdd. 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/47dc2e0d-9181-483f-9657-cf010d87d303.json and https://artists.proofprofile.net/proofs/artist/47dc2e0d-9181-483f-9657-cf010d87d303.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 0x5088e3a41e6492bc7b84e2e69b9dc9b5f09d1a4c554e0e0735b51c6621abb82b. 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/GBSMU9628442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed0c7f5f642501f56d83973a6d89ae091f0b4c6a7b41f0f366e30bc7db2916. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLC062120236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cb2768594103297f4a1b95587214e846b026f119e5449365870d86c6bdc512. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062237503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d53b4f4bdac5fb73ba8335426ad3ba4a218b26a01afcb28bfd10c4840f1df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLC062248537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25906d1c3fc394f14a32fa220cc8462483ea8318556e7a5010f5225bbfbfafe. 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/PL2DY2400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe70b043a743d1e2c87cd488287b7e898889b2800b9cae318246e4a9e993395. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/PL2DY2400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47996add22a7ab963d8b0b972c315454a964959ef5123c5cf637bdaf5232eda4. 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/PL2DY2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ec66a6a8ad36aa4834d48ccffa297d012333ee5da8176c3755098e9e46371. 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/PL2DY2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1048679b902418559b963c09d65a7a3fc6938a054e6b7dc0d1e9662b55956d2c. 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/PL2DY2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d002656d991cdd710b60354cc4007dbbd470a343544c7315132e9a18896952f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PL2DY2400241.
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 0xa13982bf121c3a20284786464d5b6ed1940e82e620ad03543daf6fbd42a3d0d3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/PL2DY2400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03749eecb50c3fab3e77c6aa1edf51db6d64ce54b628bd57e7caf3fa91296fc4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PL2DY2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c54ed9061f4f3403659a7ec998f2b69a6a43944c15789eb5805f60e81eb43. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/PL2DY2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d987eee05badd1f7a55f240ea14b625d51b3b09921c8c29789ba40e5ce9c0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/PL2DY2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe2228bdfcde77fc61d840cbf9030efdac9dfe11e9c94a8b4538fd538208c5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PL2DY2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5316ffe97c7bc122c05fb50a507db0e7cc4afe8f007bd76b44fcece79a57d8c0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PL2DY2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd29754ff4657bdce99b49a29efc3d6e39cd3c461af8799a8247a02a5b29ba4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLC062414624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09d6939d130dbf45178c9f4b87d36e754acbe6a509133a03b2547e86741c1b. 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/QZTB32449393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2633561dd9b6bbd1fa50b0ee4cad80d48445e54db1c3d1c8a504ecb359a54f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLC062431317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ed723bb937a8e42114a90fea6a8d7e32d347f1e25ad03e98e6cd673de204e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PL2DY2400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ceca9fcd36ca5817f04bd4ac8e151c002a4e168c09028c19d1cfc95d873e1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2483925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd12969ae1078ab859a35d3884f4fb89f4fe6de896b5a63a047f82fbadcd7c. 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/PLI362333125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f49feb4860a07dd82c8254d6e89a2142cef699ffd2744dd54b96b8f58a434. 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/PL2B92400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f49feb4860a07dd82c8254d6e89a2142cef699ffd2744dd54b96b8f58a434. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PL2B92400018.