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 0x13b5fdd3f1d4c3a934390ff305b371e6a147b3c36ab53897a37b41c87941df54. 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/462bfb6e-42df-42b0-9f03-7cc461fec604.json and https://artists.proofprofile.net/proofs/artist/462bfb6e-42df-42b0-9f03-7cc461fec604.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 0x915c6f99723b41d7082ed31118111a6b091fb9753870758d625a6a2a79317696. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:40Z), 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/QZFZ52045796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89e7df522891c6594d107cbce6b85ed80626ba9e9ba0db18908a8a33cc482d3. 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/QZFYY1959920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965005e1174e9207a9794ee6f2a39b6023fdb184fb915dd7c84a3d02d295ab3. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZFZ52045798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e52b1444ae67d5f78fef38b02e144f4007643a5c713e61d7a8acfb82cd45a8. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZJG52071358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a68a124fdc39beb8290e3e2d6fd2b4622acedbaff5688eb640229becdb0e94f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ52045807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb24b59a9d011cc2b969c7f534d1411664a0ae94e28824d6b2bc8690b1afeff0. 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/QZFZ52045809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25e302a65645645c76de45ef9f0dd9c9513adf77de1d694becee7347b56ddf7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2015265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e41759b84aa58baeab0b05271365e6e840220f053a200a8283664ee125e72. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEN2039636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab0373232ef4ec813c035a0a898a77f7d015ea806709096751465507952b9e7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6N2178558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5afb03fd5043786dd27f0de2461a63e62a61ec38ad5242771ea4b9ed06973a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2178562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db8ebad788c732d1d05d28d62d9c0aae5cfd5c5b4307d3a715e4daa18e6d21. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:46Z), 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/QZK6N2178564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacd257782da15ad7e39098342d0c0dcb60218af1d5341731b5d4d298a785db0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZK6N2178566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40462b801955827bdd639e56a65847f5a24e28464f3652a2313afd7df98b0e95. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:35Z), 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/QZK6N2178568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b3569e1bba3d79ad8fb9a27d17fb3b1fb5e038ee8d1313af19f48e61346a7d. 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/QZK6N2178569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f49cf67321c8c69437ff8944c900c3a011ebb66e5d643015da799834e419b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:22:00Z), 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/QZK6N2178570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12884d4f60a39664811f6191bdae7df89c1ac6bce97f462ed423ec83a1c2be47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2178571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f33bb1e4e4dea60bdfa7d2dde140a5d7b91133e71538bbf3ee4a9931f9d7fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2375080.