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 0x182a6ff401e0bfc9e073ab35d5a992f9ea2c2476d142e4b42e66aba9b840a884. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5155c72-7cce-4ad2-9b1c-24508f1fc752.json and https://artists.proofprofile.net/proofs/artist/d5155c72-7cce-4ad2-9b1c-24508f1fc752.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 0xcfef8e718d726a3d230e1798de998bb3ce699e46510d52de4f5f9f14d6834a3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTAT2376862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc20b69040eb71286ac57fbcee3d88f6bd0337d68d518d5b8d25494c7a0e7d. 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/GBVN32020002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9326b442ec37ace116f51304d2ff6f271b0bc4edd99ba2c7e2c4b4df40e68d. 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/GBVN32210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc20b69040eb71286ac57fbcee3d88f6bd0337d68d518d5b8d25494c7a0e7d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBVN32020002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc11b309474819880e666d6ded5c4afc3a00718dc9e9234f4a040c8d69ef53a. 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/GBVN32020005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8de494e7d7430539d56c33521ec1896ee0844cc066c4f9dffee5f8aac309cb. 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/GBVN32020006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a8e121ddb045edae3f89f5a8fc4872c1e7334209addd29a06ce67a39e9b7c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBVN32020007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c17b5795b488277b7cb06db35c24c44ef3df004c6d75319ac64e4d507618a1. 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/GBVN32020008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0760d9758d188445a5a086f4efcba5800bcbf34e6fce13bb6d006f479e0b4d62. 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/GBVN32020010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b82fe8518d333a3fa16974c6276960dc3000d49e1aa3eda8cf44ab7770cf5. 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/GBVN32020011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ff3f9be7ec03592421cbfdc0a84731566b1b284491c6cfc35989790c85700. 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/GBVN32310012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42818dabcc9f655277f1d2518416a16d7e6c5df93125b8d9528c728e0adb0a10. 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/GBVN32310029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b7d81437d90a43bec12e43f9844eb5f7ba9ae34370e733b6ca55f2af3d4894. 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/GBVN32140002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9389ca2f7bc54a86f04a31d2bfe4e702671a371533014866ab1300e158c384. 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/GBVN32140005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5517bd1ea138b02b2fdad3a31fdc61f2e966d10dfebb5250304e8ed129ed357. 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/GBVN32140007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d58d814f5d07bd410ea19b8ee7a779f34b82c7bca664c8e7a3c31b2193eaa4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBVN31930002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bb0db6c882824bac6dfc95abb6aa224c9a3ad4dc333bc1d8b9ab531bfd24b1. 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/GBVN31930007.