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 0xdb28d314ab20420f045d193d1216860d01316431bbd10339cd778ff37802c7c9. 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/0f0738c2-1b2f-41d4-9dde-ce4126ba9793.json and https://artists.proofprofile.net/proofs/artist/0f0738c2-1b2f-41d4-9dde-ce4126ba9793.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 0x1a803deae4989e0838ea17de79564e4b2b13fefc6d6927ec74d28983fcfb8b28. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USJ3V2379145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f9db367530ca134c00819dd3a35df96981e457e07a2dbf0b56944048a713fd. 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/USJ3V2029628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f528bd7e87dc83723fa41e326b4be452e1bf25aa81716919978fb49d46fc4c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:01:38Z), 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/TCADK1703226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0add7d8486f04749a9d8905b86fd8dcfd0a98b9905765d6dd4128de80afef6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCADZ1800489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19367a09a18d248d813a33cf427cfb078d8c9a57d4cbf9979dd117c38530fc4a. 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/TCAET2005971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f275151c895d4d4c70547085ef5e7a189c9ca3c4f0d8a2388114670da17abf. 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/USJ3V2063310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c193a657ca08312a8191dfb2163d5d686ea01ca5efd28b2c0eb5d68e6a2da3a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZS642199462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d82759e8b2315ec49d72e3fabc70992cdef620b6844f6d6534dc9e24e6aae0. 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/USJ3V2374817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f990b8f9ae36ffbd4baf2dde64586b8833f343be63a0290d8c37b7a7871ee25. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USJ3V2441409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6806fc7c54bb3bfcdb08baa2198079d3b3b418fd74df5e0c0a25e77ff2736e40. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/CAENV2410830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411c3cac35ca9510fd8d0279a3abfd83eb606edd6712d292bf45428721abf65. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:22Z), 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/USJ3V2415040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e728efd245c04f29cf16467611c3d44368058fa549bd326c120bae2cffb26f5. 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/QZHN32544243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9778118d7832fa5a14fc3944effddbb3c7e099230af38d2d1d65bb0e8e2058. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:39Z), 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/USJ3V2425838.