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 0x27848b9033e68cae498f5ee100252c6bf133f32e6531ea08102681f7a7bb5652. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5883570b-a5a5-4982-a453-f985c47a0424.json and https://artists.proofprofile.net/proofs/artist/5883570b-a5a5-4982-a453-f985c47a0424.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 0xec1432e88f67545c92c660a77f49ddf283203a45021850d43e0558704e9724ca. 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/QZK6K2491737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a4b11b0504752cafa02ffa2fb8c5c7b5f6145609c0986edd8b0c2c722e3cd5. 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/QZK6K2491738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1874321dedf7f1b092e1145375b96a4caa05b92f6bb834fd7f96af07062494f4. 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/QZK6K2491739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b49a7605b9ede50c991443a903aebfb223c7ffe3e77554462ed8ffdfe94f5b. 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/QZK6K2491742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272098bedf6df39e11d89bfbbc82adb63c38f1208fcb0dfadff1ecd354aa2e1b. 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/QZK6K2491745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0b35460ffe40a044e5d93ef1f878c0ff7c9118fc11fa43998e894cc53beff8. 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/QZK6K2491747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61e80dd5342fe572cd0511bfdff0196fbbc1d9d959faa93deb26291263d967. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6K2491740.
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 0x338dfdba5db5cdc583e71c9f5a039b5bd872216cb3a589c916f17f85455be69c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6K2491741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af8a87049393ad3a2eb7129f38c6ebca58d462534fb6dfc543df7e9eb137f57. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6K2491743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230b73f5321e9104a38f03e22b49861aa4c5443552a052c8d3cfba44e6110a43. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6K2491744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563cfba7a92bb4e8377a595425e50d7caa933eb49dea1cf385a6c1b6464e71a0. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZK6K2491746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f4f9e310fea5ade17a77967af3a4337ee4a1c2b2c6309c697224c3573d59a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6K2491748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2eb0ee4404f44d791ae81e8b6a464742d11dcbc106e622ec7066a8dda1bc8f. 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/QZZ7K2451796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903956bf447259c32d656629df9ed6f3d6aefda835bf67e683287537c93480b. 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/QZNWR2564017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc563fa7bee76899518f004cb94a0229733311506f08e3c850ff74a2e28a896af. 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/QZNWR2564018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290018cc74dc27372fa6c2036a0c3ab5f616779dcceec4a6803f53ac059d72cb. 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/QZNWR2564019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc403285c46079ac11d75d08174bb8506ef0a2389ec46d93cdaa1c1108932733. 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/QZNWR2564020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01adc8d171b16ca8241f956a2a392293e030df15ac2a784f60adf51ab7ac098e. 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/QZNWR2564021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac8182b3c0bd034334689c1be8d0c2d86f1a1c155c5450dea8fc7d98cefa1a8. 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/QZNWR2564022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a8cc5216835d992693e3ae2f5d947376e65ed3c2d97b981d67fb2fc3ff102. 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/QZNWR2564023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fbe280a5ab1d92ea2e98ad27ad38827c867bd4bf28768c7b2faaaf8d0a56f5. 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/QZNWR2564024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968ff0ad743b3054f950402681f6988b22a6ea0f70aaf234ce76af904ed612b. 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/QZNWR2564025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdd4216a1523d4570cffd0bc2efa63542331854dd1164e39a03272ea4bad6a5. 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/QZZ7K2450528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2974dc9de13f10b234e7b927c3056f09152f85b0d25bdb8ba8839de68c6d3b9a. 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/QZNWR2564027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e7e7af149b8334cda3ce782edef697d6fb618d8dc3a1879fe15eebeb6714c. 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/QZNWR2564028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688a56e8f39a7ee3175fd015690a30ffff0b8a69f01c6113c6de7f2f63e2c767. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWR2564029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6dc293d3d541857198919aba5bbd02e8da706b059334c8fc600858db34cebe. 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/QZNWR2564031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb15795da6c1d11e1ba89577b3f660724c0219a558abebfa7e5f2a73a59038. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWR2564026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88797c12c2c0f1eb39dfa5849dffb3b2e62955820833e6be4b49800bf95775e. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZNWR2564030.