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 0xa924bdaf807106e1295c335000217e9f8628ac401a6231db755239541c373299. 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/da7c000d-4d07-49ce-ada0-0fdc3366ba34.json and https://artists.proofprofile.net/proofs/artist/da7c000d-4d07-49ce-ada0-0fdc3366ba34.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 0x61d6b3a82e9eff8f43ab4aeeeee7c252cd51a7478c553b82c9a4838c2ace42df. 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/QZWFW2547959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f2924bbc3edc341ddcab4bb8b7f5612ab8497fff9925b763c25b322253ba3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFW2540820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3bfbf34b8cd8698074b8dde3039f4a2dbb952853d3af104a4623e35cdb01d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFW2547943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0f9827177fd7d7ee966126907a43df948c34fd783809681b2b1d8e2031b51. 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/QZWFW2538283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dff12842d23dbbadb76e932f8d4d6934d72448ab530daff2cba57bae20e4e8. 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/QZWFW2500590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14477f0460f34abf0f42425955b2af24f9f2e9cf706bcb6f833e2fabc5d7a40c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFW2500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d28c40c367b061552919e8935117bafb6603fb3b717d6ead5ec24ba70ff1c28. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFW2547878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b6bd763fa902189e18ddca9a756cfcd134fc5152a4e4c478f88db166adc41. 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/QZWFW2548047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd3cee77826efbbac2eb08f33ed30d114cc48c888397511e4b04dbcce51f58b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFW2533800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f9d8e3cf4875b833a0486f2c3541bcaf84cb94a67d72853220c618c144652e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:18Z), 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/QZWFW2538370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcaa2fb863865bcc868e00464c633ffdd2cbec2d44aff37b216a3faf8c371d3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFW2533787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81048e1e508955a36e6c10778407d907b47ddabe8f5e01e42fd72be116f67a86. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWFW2547942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c74f7da42c279843557a428a00d88aa98e831666bf0aab91f8930de3d332c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ772555671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40533700635ba539a856b633654c8c46107b1aa60d9a4ae1a0c5ba99eaacd2c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7Q2521955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bdc56757ad14df05eb3c1538ea0be3c633a8fccd09ce7c892889cf2e6518d. 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/QZZ7X2575804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816a750cdff9ecd43ffc6bb18d5232fcb2db0dae6ea7e89783fca1711920dada. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7X2575805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436996dc5d9749fd7570511e2503b9690445234df66e880f9e34a1c117539dcb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:22Z), 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/QT3F42574662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa49453787d58fcbb0067e7f09320b619b48f5f634db5b463cdd399bcfa281f6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:41:51Z), 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/QT3F52517989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2981dd8d46ed3060f4dc50d19b3dde2e586250953b22984e4dbcb00adebcef3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F52504054.