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 0x3b6129702b4c45d17c4e9281f787c79654d66b6b142b117d20465707e971d4e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49226bf-1abc-49b8-923d-ef3dc99eef6d.json and https://artists.proofprofile.net/proofs/artist/a49226bf-1abc-49b8-923d-ef3dc99eef6d.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 0x7866654fb147c6cdee52cc79d3876209dafdcd3870d0538607ec8c308a5f787a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM42K2079579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efa982ddfcfbe0cc1a526e1af42d9bd42f56ee65c1e1072fb1d41ec8a49abd6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM42K2037674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e329d3cfd330b28e8a163309958bb3f13a51d06b5b4d065e9b3a47f0d6f2f1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZKDK2025321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13e62997aa7fc2355e7d7228765cb87e1d8474db028209efcdc49c0d93450be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS652221374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c97fc726bb1163c09ce51eb33775b37d1edd421cfaab665da64b07f9b5f4030. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMHP2322024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f49478b70e93d79c3759fbd8afabd2394d2e05d27241917a75abb7c6e704f0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZS652353360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521b59e3c4be8be8ff4d4c5724e333fd8089ae70d1616cd31143a0eaace11080. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K2245568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0111b274542dbf126d1fe5f37928ea33ef2aabadc2865a5e266d6e3aec7df3e. 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/QZS632298793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85240f376f97815a8a66898c4decf65cc3a31c3b387413366ca5a91872acb2cf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZH5E2481526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fd7030fb0a5712675021b2e370323867639ee9c16e940e0817b71ed2117138. 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/QZHN42524435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afb091827035adfc9cb4a24b6435a811e15a9c17c92157381796dc970f9cd7f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:21:53Z), 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/QZHN52581985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf84afbc1c15cf4accb85321f9c6c4c1fd116aec7eb03d0c41a484498300621. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:29:17Z), 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/QZHN62556306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638b5333ee7cf72f265107bb8815284dbc73d730f78ad8532035affa7265fbf3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN72532582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97745df70adcb19e8634b67f45930af48d7ab0d76e97a19830925b772df8ed71. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZK6P2518775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5760d76d5e08717f94b32f380851e11acee8f81809cf465037f671575599de5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6P2518776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d27e9bc63e44bbd2cd82502d05f06c507f1eddc20f07a95392883944692682. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:23Z), 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/QZK6P2518777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269ace7a93a07463d9bf1e35abfc07fad0674b782639fabd168a585c3155cb54. 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/QZK6N2538350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8560e751d242c2b495fd1bc7cbffbc934a1b1661b48d591b75ebad6122a3aedb. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6H2591732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea77f1901082659236dafd1685872285820041391692b6ff1ecd62b7dce45ba. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPLR2566793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22bfc9608bad409f79e312820a6cad4b91b0f4cce7a8310b69ed0b77102d3d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZRP42581506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16439f0dd15d27f6b80962f545c531d38c480038b525548f0c1f787be8463a3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB22564727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa9d8ce9b686da57d446481323c796b28db2b77f326dfc37032b4669b22acb0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:19:22Z), 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/QZZ782548888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1e497e663f19e091939f7a34cf203104d1469742bd0ff4557c6ebc6eca724. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7Q2587853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014a1c6cea050a0bb354fd5aec9e69b795ff2dba8a1603b2505213cd762e7c7. 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/QT3F52564553.