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 0x6f0116f411cdcf899fcf512df31bac448267b598abd0b14fb7e16228b72b89c1. 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/5bfa8055-4d6f-487a-93df-f77f678a14e4.json and https://artists.proofprofile.net/proofs/artist/5bfa8055-4d6f-487a-93df-f77f678a14e4.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 0x210faa4561e5c876e69f31774c38e6b4b3b286fb0c39abe3c3f58cbddc83fe53. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJV2347866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d57bb5d325531f6a039ad544eab72005ead4a0a72d30b5299b31c998e4d08. 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/QZTVM2347308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e7ca9b095a9dea564d6430215c281b1cd918271e3d8e44ee4ea45fe5337b7c. 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/QZTVM2347310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16bd379a3a2f0c20c647b1602b406e7d870db5a0287cac72256d5be3017cea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2309551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06274ecf843f4498ce0d2492f42298157eca9aae172447c8f8de5f352526ab00. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZGLM2477745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3cd9fcc568d38758c86adcd08d7dd375cdda4802ead7c513e09438ed6cd8f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7G2201435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0879f786898d38a022d0906d942e1aa7ee88f23dfe77a242c61d03985a581. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/AEA3A2209954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326da6035b82a9ff0a5c871b74386ac7340233271d3cc41ce287641eaef4b98. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7V2385706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06d6e14f6821a0489b3f40bbce0ccfd7634b59ee5fe6559ddb5f28132ab8b3e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2508612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e958555bd930509ac6dab94f4ed06406023065ff8b4b12c95e06e216738114. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXD7G2518109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3cd9fcc568d38758c86adcd08d7dd375cdda4802ead7c513e09438ed6cd8f. 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/GXD7G2201435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a5ce7d2e195bcfefac6ad90d75290df6c425d1d570c46c720f42ddd39c7ee. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GXD7V2516787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f621ccdcd7bfb56181ec8a0c38ada53c74eed5ff8bbf3fa7af0cc5624e9653. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AEA3A2462760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a31aaf454f42eb89d9fa24387fbab55a3958217b9bf5ac2ce93b40ba589abce. 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/GXD7G2573507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0879f786898d38a022d0906d942e1aa7ee88f23dfe77a242c61d03985a581. 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/AEA3A2209954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45fe74aaf16d0452dfea5afbbd93da19cd15026c8ea779bed4b20d82a3e6c8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GXD7G2517383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1965babec928dfd116e6ef0ce5627809a8eb4fae58af1ef25e792f1b8d85a351. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GXD7G2541950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90704b4358a5361b5295083c40b875e44c81d1e8faee925178f2f91c37950e5e. 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/GXD7G2566345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc32565a9d2c69f166a8f6c7160f5d1fafecadb2cf3f891761f9c16f488a6ff8. 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/QT5M42521890.