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 0x58a967f51c46bfd1ca7bc613d4ddff3f0707f3d0a61d8148c323dcb5b5de3c66. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f6dd5cc-b074-4646-9494-4b25dbbead89.json and https://artists.proofprofile.net/proofs/artist/2f6dd5cc-b074-4646-9494-4b25dbbead89.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 0x6268e2c9a555015d3288b88f5d0f424442031ede8b035d4780b100c0d1e574d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62118809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fffb28dde35e44e59623f3bb7dc69f1c8156275bec4e6aba85f867d2fd87e2c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2481779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b465e5ebf3d9a43ff97745794a9839b3af6bf0fd60b94d530aaa15481cfd7ff. 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/QM6N22516931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d494cdd9f3c77aa223bc8fa3ee638fa303d0dcc055b1b255e30126af77e32cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2518989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd718568afef04f3634fdf87199ed209ab4dfd94149ef37bb5dfd26721f736ff6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2462564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f6392f5035ac00c78c593070d760d7bd8281bdda633aa38779b113f1875f7c. 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/GBKQU2419718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ca49fcebe1516b5e7e1b805f036c25e0c7ecc74311370869c2ebd288ecf3b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2411893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb79d6a1ca0c56280d1caa674ffcb2536b8a5d5b5bb7e2181a1eca5a38d1e7. 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/GBKQU2373565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae588afddd23d7f21c8aa476e1a64fe81834613c7b9a72992d7c7976982c45. 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/GBKQU2348930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7dba6effc4ebc062a41a0ae65a43982b17bdb4cb666f18eb670ed033ba2b45. 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/GBKQU2329835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94148a41e118805e66457560574fc2b8782b71a038eaafd2203ca9a25fce94eb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKQU2321605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f57d09ad7a0eff0394d3c4451c36e40a3100a992ae1b90cf0eb47c346a268. 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/GBKQU2299573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a779299a4406a18c75e16685beb2739d9c36fa361f84e329e1da496e5a51af0. 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/NLE712101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41521d8b7f90366ecf7afd2e49acc9686189b6d5b2c96fbc43a5917c91a41e51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2144774.