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 0xf64675d73603dde5df226b67d0743284ca6dbd2371d96361c8761de621ad2290. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8c511e8-e1df-4cec-a867-d5c9f4152649.json and https://artists.proofprofile.net/proofs/artist/d8c511e8-e1df-4cec-a867-d5c9f4152649.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 0xd10a6fb29dc6f2bfc7e983629f308e2dc9797f7dacb5134c080ef1779147cbb7. 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/QZES82257738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9acf389f0a5d9dde46ab96421caed0600dc10ca30b0a20864e6b6d9cff329e. 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/QZS672223124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207c26d030622425a782796d95fefccedd7ecf6534842ffd82db64df9f8a41e1. 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/GBKQU2199655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314b62e40ee7235b755f99bca86498e9b11f5544c22bd7ecd10ddd733411c9c. 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/QZS652138343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4943aa9564d7a54f173ca02315497c9bd17e8f88c494c7f1c0bc6deaf5ac19bc. 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/QZS662100533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d35edc80cd30ea986723c2d6d481a64fd76f68ab2f7596b89cb1da57662a6. 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/UK6KW2000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826778b19f8fec913ccb5d653f24802d5807756042532b7e84be0edf50c6eb49. 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/NLRD51967459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc53cd87c006548b98a8df875dc545350827b63468ba667b97865fd3822e71b. 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/QM24S1924634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14265286cf434f61339d77bb76a5b90a338b11f6aad8a76f2ab8930a24213bf3. 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/SE5IB1900823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee79f1e4060c429f82f859511a07af84264587fc57b6c8121d8b2f23c15aad9. 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/UK6KW1800172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb772dd254ceb6a6d51685e09f4414122813c2b0364b23e20f3a31a0b3b08808a. 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/QM24S1917756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e140f182c3f8a5f2c56a95cc3530923428942a6f0920b67550a9338b06919d6. 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/UK6KW1800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb750df102fdc44e729430e7c918e286ff7e971d9c4aeee5ed4856fe076a75ad5. 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/SE5IB1900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66bdaa97029992b6b409a39db3dcc190714525220d8c126b403ca342315d80. 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/SE5IB1800881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3435bb3923be6638bfc025428a04ad85a3b4090fb4bfd290421d53d97129b7d0. 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/SE5IB1800529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b54f665b31e68839ad56b5fa420bf9408b32006396170dc6b5a232ea2b6481. 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/SE5IB1702344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2799761bd7591593197f805233cd064795d0510d444aee6b747fd0373f5f0. 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/QZANL1774913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d086700c6d06d743b8c62ca70804b0399931e31c212c4f5346fbf953e8f6487. 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/QZS672222987.