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 0x296a45d9859c83c2edf36a5afee2013fc4467df86644a21ffded1f79ebb50560. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f32375f-7339-4ad0-b77d-2a91a8faf1f0.json and https://artists.proofprofile.net/proofs/artist/7f32375f-7339-4ad0-b77d-2a91a8faf1f0.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 0x8908e5a871cf2085d93003c49cdc967a26ccc386889926dd928e59d52d4dd65b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AR5UH2300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600efb3eb512c6aa631248acbaa2fdfe3aba50ae548658eb36f3fbb32624c8f2. 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/AR5UH2400649.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e0f0d68db529b0bbc1aa02d51fdad3bbc495ffc945d703152741ef6116c26d. 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/AR5UH2401183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be002b4984a46da12881e86f60e889ea71e711e6619db57e015fc95d460a4f2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:44:01Z), 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/AR5UH2401665.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f00ac982af0b0b08528d6b4b0dd5ec7d5d9fc9ab8a35a6c563a8b87a2432f. 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/AR5UH2402186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4796ed3546b02d76feacd3e815c9664932bb1efeb8aa4448626ab650e727d0. 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/AR5UH2503875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72139b0d674f2f6669907a11f80f3984117c78f09271b57277f7577d29ab2c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:52Z), 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/AR5UH2504646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06aac228f514228cafbfafe4ae8d493a465c2a4ce8e04009f664d1faabc9e28. 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/ARCS92400001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779010f593f4ebbd2fba951b996b912316bc7e0fb4a3b8fd6917a1041637b1c. 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/AR5UH2400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bb56bff53fc8f687f4b699a63fbdc46d0cc7a54e6c6f98cf075ab1bb78776c. 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/AR5UH2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13331584aa2bf6b3b3a5635cd5654ec10ef5aa8cc3892e69b97e10c573926111. 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/AR5UH2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a1988ab6084ed7dc974387324ff81ad3c06f0bfa8101ed72a350cb66085290. 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/AR5UH2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1410dc3134686adfa31d89d1c44408fa408b3250a7b690c645f812e56cdf9d. 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/AR5UH2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc251b5934bf9756fc68586773d9a0519e9b7a545483c0aa65f97b4c421c8f8. 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/AR5UH2400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d990313b2ec704ed74d4f9baac739768701cbb03b486894987c1f2713a204d. 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/AR5UH2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922cfb79e148dc1a45d68d3b63e919bc5450188a470dd5c63e3f051ba91246a9. 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/AR5UH2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff87c3045028a9876505975f3625d7bc931140fec01ff752e655e9b867277c8. 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/AR5UH2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fc3935b3c110790eea9c9a84e20530c2a3024450a642fa36dde8a29eac64ca. 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/AR5UH2400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06aac228f514228cafbfafe4ae8d493a465c2a4ce8e04009f664d1faabc9e28. 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/ARCS92400001.