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 0x8a9dc656da13ffa1c51dea3fa2d55684026cd4e5aef6c0254867e18bc873db8c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3cd17ed-fcc4-42be-96cb-b34837335167.json and https://artists.proofprofile.net/proofs/artist/b3cd17ed-fcc4-42be-96cb-b34837335167.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 0x1c0e6de1febe2619785c859ac3e8a6687ce5dfaa5be9df7ea83680e4626995b1. 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/AR0982480009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2016927bc02c5b2047db5fdf84e028e0d7e793d1b68ddc0b88e85dc700602. 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/QMDA72345484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d9b991ae6e2f6aa8d64382c164071861807d6647dc3b61f72e580e9ebd7bb8. 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/QMDA72345485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550493fbcda4dcfe37325e0ab2a360902baebb1b1d779a5fdd67054c1c1cac12. 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/QMDA72345487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe944d78976bafbe671ba803662074b84a864ce1929457ce24d328c469f9eee8. 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/QMDA72345490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb785e5d9c65ad560f8f5e8546b55cf06b389cb964ed8dcc5b03de74bd89f3893. 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/QMDA72345492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990c2261bd34370ccef1e686d17257c5d24fca52ca1cc208209ebbbb4307fe5. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMDA72345486.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133d4e975d6e648c68d76aefc339260652533da63018233ad163c6fddf55aaa5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA72345488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585b25c76ab483a1f4155e7ec200803a366256f6e28992934c3a0e4fbd990b66. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMDA72345489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515edd622a40af3e752cee863efd9e634e02ac2548aa088fae1f7bda15b02c7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMDA72345491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d14ecc48491d2a2424071f0a3af74c1889ba0cf870b5021cf7773745d53ea9. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QMDA72345493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ba05d639a8397156be30be9b8f73e97f0ba245f84d4e3aa3058c6adbd1b68. 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/QMBZ92400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a0847e924783ee4c8127bfc07965b9d71f18a9633eea4c73aece1a9330260. 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/UKXN21949670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08cacfa11eff0855d7433b10c56b5c535ee4ba79aa38f5a949ea144feae236. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ARHXW1901444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc68ad7c3a6a683c1e2d68356f942457286447dfb172f104ba48e1b2d7a0ce1e. 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/ARHXW1901445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb0fb55c62763cf4b960522ef616f6ef1e2170c3c83078a259fcbc62c5c2115. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARHXW1901446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1022eaf007ae79f43e863fbc401a58305c442ae174fdc4cf356265cf72c35b2. 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/ARHXW1901447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf75d72f886952c551b70a1dc97edcb2c50c1434067ba24bc2a494bdc9aab03. 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/ARHXW1901449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37c40ac4d773689ff6f9ba567e6bc49f2a3fed8993a35713181b7e2a4532af8. 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/QMANG2209881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494409dbbf0d02b46686cda1e37b52df85b0b614383bd034da2eda207168c1e. 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/QM3DF2213220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde1f7100e95dd3e3a7d948c67d1fcf02ee22f861fe8eaef0941a7cf81a987b2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM3DF2269156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf22856bd51b47f25a58f13bf0a2fe9758880808f88e91e152ccee8624c8464. 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/QZHZ32281174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8314ef8b2683eb951127911baa638b1cf0e0fbbebc0ae41bff388f3b4832d4f8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZHZ32281172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b520afa23e0217a2bf1ea13d31a95f4c8c54e32211ea1c51c5a5bdc80dc6e45. 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/AR2P01400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d611e96ebde438c439091df47847eec47b759fef2a9154e8578ffc0fb7476. 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/AR2P01400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d4df237f074a66cdbc7fa8a105daa9c4641bbbc758291ac3f6dcdf052295cb. 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/ARCH21900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db7278f5ae5c9bafbf1fdeb6ad8a9bd5a1ff60aacebbcb01fd136f606e62ba8. 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/ARCH21900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17877f2235e8d4c55b3812ddf9dd9826db465498a74f1bc185069ad8bead7451. 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/ARBCC1800005.