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 0xd7c50de1ad514073a82189a63cbc9ee0697c87eb4924d9b81641435b778cd5ef. 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/bf8b2b2e-09ef-4733-990a-e3be642d9222.json and https://artists.proofprofile.net/proofs/artist/bf8b2b2e-09ef-4733-990a-e3be642d9222.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 0x1059a3b393c9d1d871dfba31d2d60b081f7c8b4e927929bae0c1647855b8fd5e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZQAY2184116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a14e2a2cbaa8f3d31fdade1367f27093822292360d25fdfb6d0d355d0052b2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2179933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc0136b677754e04435434b096ae231b8ad102a9f107fb101a48a68c09045d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZQAY2162861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa678eb82d79b4e9aacd34d826c00a5cad3899e0567ec740ee83fb1cde4fc3783. 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/QZQAY2199918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef24c93e7aa8884d3244775c0fd0ce9a76e1fa68131361fc1259ea0c90192fc1. 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/QZQAY2131753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfbeae56596dc4860b1c7d3839d67e1c16eacb73cd2944b96a6a6e3cd687f5b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZQAY2112499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e792ffa9d9f0c6552bd0cce0bce4c0e3b7cf6dfb79665a2febc66fd2a4ffab2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZQAY2100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c06d26a836ce43e68ca70fdaa04cf1f3b1193d50bba333897e375c3b80a5295. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2162678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1797a23b17ebf9ab40a1c084a97cb4d2bce3adc9dbad86cac8c55acd71141e6a. 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/QZQAY2145438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16155e1e267b71d0054870b78097403a6fdac618fa1dea49f69448f6446b76fb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZQAY2187878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9574e081cafd132f1eb8b5ed2e77e9c04009318dc82a8a8c958409f7659cf13. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQAY2138037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c1b06256b661b6ba8a670428c11bc97ec553202c7008e3f0a99efea62062b. 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/QZQAY2170697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3346817bb6e72d2efe978ea7c7249c2a3505e1007bc33db4691de95bbbbd759. 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/QZQAY2147353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a86668cbb7bf4473ba12f3fd26f36121957918b5c44edb58c28d66e6516d1e8. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZTLA2253701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d3a69d273fba9fcbfefaf0218338f49f75b3208c3fff90477e9c98553974f. 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/QZTLA2268124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390aa985c33ad03d3b6869190cdf575b8e12382688f426d50f26209f86ccb5d1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARU671100001.