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 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 0xbe9973d14c78bcfbfdc42c0606cc209644ee5128ccea271f962aa1793d7d9429. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9546f5e6-2cac-46be-b094-80c57631ab4e.json and https://artists.proofprofile.net/proofs/artist/9546f5e6-2cac-46be-b094-80c57631ab4e.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 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 0x95c5cdd2e98aa357b0feeb737ad9441e6c5ca2fd61f0f54b9d162392c6d15685. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ARA901500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f403dc3e49c8eab55dbd6bd3e6344ffb2c24909e8a1c859c8d7ea46e027ef34. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARA901500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc9db9e8c43442dfdcabfd45e2d9d64ba450427cb31eb9b53d63986ff3e6462. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ARA901100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c425e6cd85eca44f0bdacc568e8f03ed49f5b444eaa8cce20e9419f72949db. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARA901100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbacf3ff8a0dc5840eab93674b3e98c2ad35546b4fb924a39db4c12fdc75377. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ARA901400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643226ca626b53bd5e39ace508d81730fec8a04d64e1eb53e140ad0405ee9f2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARA901400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6190c80588547b60e469bfea862041cd4c1dc4a9568bfeb376db41bb810eff. 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/ARA901400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06a713518d71ab0c5874881360dd568a4869a5e092df4d65eee897f85d3f4fb. 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/ES71G1872533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e12cf5d97c1f6ad1e49037cf02c43afd4232a64df4b841c1a6066fdbbc42e33. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES71G1904883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ffdbe4ad176d7bb1146454da43d2d87cbd0541b58773480b5e94d573ca0827. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ARHXW2400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c12aa7e80bf04506b84763160d4b96f487faaf87e4a5b692b8430e8c8275a5. 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/ARHXW2401398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da8e0a8b974988220f58eccb74b3f35fbd384769c20394b95d81d7f03ff9aa. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ARHXW2401399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ad89e93a4c2c263a30373b080432d1b49a032bf9060a2244fe3c14a80cf78. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARHXW2401400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a57f5c138aff875a551fe47472dc11d544f58e6785b67afaef52b9421677de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARHXW2401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789779fb54b4926225755c15cd4ceaf65940b3b8ecbf7ca6f5d79c8d80ee376b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ARHXW2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ecec385da9ab075ac6b60f0e70d61b0483ee3cb1d26e6a3731544aab186c81. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/ARHXW2400794.