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 0x44e1352786a07a597853854dae04b1f23996de78de668878920de9de02e2fc75. 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/d474935f-557d-4079-a502-c0c99027ce64.json and https://artists.proofprofile.net/proofs/artist/d474935f-557d-4079-a502-c0c99027ce64.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 0x9d2515d873dd38150f6f58eb4d125ac56fa534f165fd2c02671aa0b3558fe461. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6G2110496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e533f7317dc641caec8adf26d96e81d64f432691e4636ca82c58b9cb4bc9e1. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:43:01Z), 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/QZFYY2254555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e507775e200dc787b071274930ab921c4c984b665b68c043fde424f1e3401e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:25Z), 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/QZK6J2269675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c75456a89d946d7078bd11e9272ffc0e099d8465cff3f41f3a41ac6d16d2c9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:06Z), 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/QZNWS2299380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d58629b0c09f2457fcc3d574923bc4553ea1b477728f7cbc6d0deaa6c89bc0c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA082246443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d278da46b685bdac06034d3b3cbc59abcacbf77d0ecefdcff1eccec00d1753. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZS632273889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf3856e7000337d7b8dab663f1d2bdb743d0a754a7626884de83f1112975a3. 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/QZES52392964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60d1bc10e19981e3b170cf56117cf89787577a51235d8cdeff9dd122df142e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:28:20Z), 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/QZTB62368534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d501e724d97ce2b66155db5cd9e3bf928c8f8a7ebe67f162b6d9ef34c6e183. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:25:46Z), 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/QZWFW2415525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99d987410c7102dae2edcbcdf2cdc116b4fadc232c867056a7478bbe9adcbca. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ5FN2531082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51072880cbe3b7276fa28427cc04fab6a3f93f7b1ed74df2e2c94ccd50ebf68. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:05:04Z), 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/QZES72595928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1364fdaad0cb165d88ac249f6a54b31da5d01626386c8878dc0cd78dcdc5e7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:04Z), 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/QM6MZ2544615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848ee867866ca1975fcc88c7659c1e829f92a05233f7740f5363f6baf3a7ee9e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMER2504178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d39339cd4cd572af51586b29a6c8d0878daae832a7bbc67c24a6ece0105a0a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTB82576424.