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 0x84a21b6128a4934cfd3a8da260c8d6df139a66c33d0d252046c63eac20c4894d. 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/a1672aa3-3790-48c8-a85b-11b10927205b.json and https://artists.proofprofile.net/proofs/artist/a1672aa3-3790-48c8-a85b-11b10927205b.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 0xfa8f35881a0311b14da7b425e8928f3d471495c4cd5f5084ffa1061f3ab8b28c. 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/QZFZ22124034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393509487c9c4ead7d6246eea293171ddb68200f82ba081ab451a299ec95d9b4. 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/QZFZ22124035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebc5896de14aa3f5d88f517716b58cefa53cb340b57c24ef72b7be0839c2877. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6MZ2407919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd57c4067c19ee21950fbd96bc1d267eaa148da420af2cd1385ad38e09afc533. 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/QM4TX2342784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2072738fe6d9934fb5100109a08b4110564429eab5225d34cd707a7e78b028. 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/QM4TX2342785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc354cc3093836a2d9f974d349e1741bf227498946c39e2da84cea30e483ab6bf. 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/QM4TX2342786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d6fedbe0bffc7ee56bd1e509f6d5046a8a1b002a1166f31efb9739d675e9d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX2342787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6fbb78af4b2c395090aee70e8ce1cdf1ff412ee291a83df7e03167ede7f205. 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/QMBZ92278492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba184f5e9c58f398177a73df4c30b61f25b8a540e2fb9516c4a74cc637207c81. 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/QZHN62251798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd1f4af26870730c9336ef409f296bc84faad105c9f5afba4f15b1e4878a94. 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/QZHN62251799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6710ca7c072848bdd980d2111844be657cb06477d289176d02ec231da160b50e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2143081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef251f1e44d70a95319a1441b55ec0ac006e37efed941ea6309d6579189326. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ22233317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bbacd4dd6b9c8a8b091d2bcb2958fd52d72aee523f299316d5e3a979b519a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLS2105848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef251f1e44d70a95319a1441b55ec0ac006e37efed941ea6309d6579189326. 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/QZFZ22233317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bbacd4dd6b9c8a8b091d2bcb2958fd52d72aee523f299316d5e3a979b519a1. 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/QZPLS2105848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6710ca7c072848bdd980d2111844be657cb06477d289176d02ec231da160b50e. 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/QZHNC2143081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e392ac98d0ef0218eea1985dd4de419a9b4fe78832dbf7ff94696acf7a0085. 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/QZK6Q1955599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55cf2dd12def028b24a758752253763bfd8263d9761aad2e298f095cd50f3fe. 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/QZHN71969908.