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 0x227c07fbfbd92ea44a11b410041828e703b4422956d137827c285e2fab5fd83f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43c78d47-bb43-40fd-849e-36ba235672f5.json and https://artists.proofprofile.net/proofs/artist/43c78d47-bb43-40fd-849e-36ba235672f5.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 0x577875630d3c0f39a2a600b28fa8b17ce3e28f6810bd79979c7ee973b46d2b82. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USHM20637820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e654178f6e12ff94acb2f09ef3ae06f89c72b765b9bbbc1a28ce12e84fd9e1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM20637822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dc96ae2aaa12ea645c17747d0288a43e6e9d3bc3f9b20790b82c3dab3190d2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USHM20637824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82596580bba5ccb294191d7d3a5b3f81265357ebbaf5435cee2589c1dc43d5d4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM20581684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b9e400e7302d0011bd0ae376212e8e3e2991cd9b9e585a66da783477ff7720. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM20581685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e468b7c52ed90fb883b79c63489bf20fe1a28bd8f7a5fc6dd682ac309ee2d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM20581686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3af8d62966cacb5e4959030b271df9abc92d88ca8afdb9a77743fb55431b93a. 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/USHM20581687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251941943132822548abacd686958aff4136147285970c091c1fd8bfebd40b66. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM20581689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab43b7f0774a9b16bfbd98c4df3ac48509b3564e739969df0912fff8821398. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM20581690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2395e6805b839e5094cad1f34cf6fdfbee920c2e3a8099087b383032d9dc05d0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM20581693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe587485687a721b849167664ce1942e6cc887ff4922710d40f4291a9a7837c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES7460500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9454a9147ce5f22965d822258dabeeba4b2839220695086ac82ad87d6aeea0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES7460500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83f1c75955d54c56e70945b818adc61703a25bdd7726bc56ec0cd93c982429. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R0754795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead4cd8a73b881916813590717270c2fc0c60f9ab92edda1ffc7c011a89e091. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USGTJ2500044.
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