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 0x228cae9ba55c3024f8175e802dce17987cf377fca1654a15db50a0b718b04bca. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83172314-cc92-41bf-8741-4f86677cc97b.json and https://artists.proofprofile.net/proofs/artist/83172314-cc92-41bf-8741-4f86677cc97b.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 0xf7d5abfed98bbfa3805ea4a1d9d1acf18d4b453f8d10df17ef4a6df0dde60717. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:17Z), 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/QZNWS2357025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da90bf983e22e9053be8b36d72d946891bbc6191d996994b0bf7ce5437e11a1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWQ2365422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e2138f6bcff64ee71f1f10e98ed93b8cca4bb204a7b3d2b48308a5dcdf1ec. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZTAU2329460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0292576aa92afbe71bb1673e842c00296238fea51cad523b19eeb6997ca96ab. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:51Z), 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/QZTAZ2361923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62eeffaebd7d955dcb36c18b923583b8734f8135aadd6e9734fdada37faab6. 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/QZTB62380451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777f062e90167e8717c1f1f32e5e09d46f06d8eb990065c27719eba277d11afc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:53:29Z), 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/QZTB52309153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040f2b443b760a4baa9341bee6064a2862425cfbd393122a59496905b571dbd1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:58Z), 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/QZTB82325570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d26429a9731d6b2f8d3ae2904f1d2852d919b08ec36f7994161b9eab890a288. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFR2332929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f04e57a0deb23be7ff45eec7f4fbce85411986f309950a77cfc2f8a371b9841. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:25:04Z), 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/QZTBF2369091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc1f2483762bac27bddb6c3845d8a9fabfa54f871134760100b8208c54ee10e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFQ2330391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b11158f82e2c4e44a15d8f4264dbbd184a6393fcfafb959d2685fd9601e004b. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZK6J2440816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf359ee787c81825ce0c1c1f76b0e8c850606161d61b1c3ab043d84b4975959da. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAX2487367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62525a8a19032915da023d7c9959d1df77842529f03e74ccdf1323edd36ed645. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ792422861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d37d10e2e28c2cc029c94fcdaa8e547568a3413d51ace8745a7c4cea78312. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:07:02Z), 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/QZZ7W2483468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4577965b9d02dc57739ec8a6a6b70027b88e60b538e7cd0458f9262583cd57ac. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZDA62572037.