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 0x18d09f1c32abf18b7b95b076b5fde37f0ee4023e37b77f372b121ad2cfc82090. 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/bec073c0-9c4f-4599-8369-a93382674f0f.json and https://artists.proofprofile.net/proofs/artist/bec073c0-9c4f-4599-8369-a93382674f0f.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 0x128821405c5f7e8428e166f94e04514693e3e94420553f5618128d6c94fe3419. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZPB12403579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d77de937b62828ee484c7c6c7deb3018f94d1a71298a0de22cd6ade2d9063. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZPB12403026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b9bd41807e57fccd86f1d2b64a3354a982629cbfabe4d3de74ed10f3559afe. 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/NZPB12303766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda85bc3105443807c8f668204938a4848749f97b1a82b1e4fa09d754e08007f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB82381653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96479b547281c54dfac41d355a0d383f85bdc93b6edaa6512f869a46e38ec8a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP42354627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae60e4627bbeedf612eba20b2c04a2cd4f9252400f1200aaa8b4f51d5f76a85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLS2366235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadbee5016ba391beabf16ef42d4cc8a58fd551165b09aa4b233d1a9329d82d1. 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/QZNWZ2394081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64632cea33e5e6ae7569c088fd0f1fb1df911e5d7e5ffd26476f09691e1a7c17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWZ2367299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d17575fe9ffabef140b022fca7c00342d5db333955c81d4e00e4d1f54d5116c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2397565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149066d36bdf7d990e8a4c51cff627f46b270d78b974939ab2a1b67bd49007fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWQ2337935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28890c82c253fd86f5085beb4e41788a73874da09af856056a4259919bcc6aa8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFQ2305359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c60dc2ea5dad6bf762b5b942dea7e5d4147ef4f79c4fbd72b101e0a379ec73. 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/QZTBE2345030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72745ee0a5dba6ba43edd75018c785535e5d7146830fe1bf26885b22d2c488. 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/QZNWY2322536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f99d2c7a7a367e0d77a2daa5c4f63ee7784fb50d4c78a92ad2cbd6256de9c. 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/QZNWY2322537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad61da6084bc2a2c7da8c4985bc925fe8cc6a36eb87cdafc1998996cbcfcae16. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:15:16Z), 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/QZFZ42426247.