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 0x79e206b640ac376b09d3eff8405ac81d8ddead41c7e79b568994c7ab37a03b47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e695062-f927-4504-9d14-c15d3daf1b18.json and https://artists.proofprofile.net/proofs/artist/7e695062-f927-4504-9d14-c15d3daf1b18.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 0x43bc26c9900f82aeee3412a2c6aff6f2444dee8fa3cf52b997cd15ceaaf482d5. 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/HKG732277823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b713a15d3b181af8d50d39e13335ad8fde6a5c89969772d5119528ae7931f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732277825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce54b61b606dfb94935c002932c2fa2d243d030453eabd24280b70f91e61841. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732402276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81ddf838155389a40f012a8e53f27ff8a66fa3e19ebc7156f3a1a3847f761e0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG731662344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebac2ddafb5fde59e92dc696c7eaa283c104a70e6081d33a80c5284690c93cd7. 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/HKG732329974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a8d8ee290c7b0fb4277910e16a33e404937e7802b16cbbc9cef42e316ba8f. 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/HKG732329975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66326edf43fc91eb21bb5fb25ac5476b25df57c17cb871867c485a8e9ff4c3ff. 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/HKG732325764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6401344210d0b445bb0d29e3466bc608be76d1dbf1631be371751a19db569df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732262363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f55130895a84d46332f6a0a4cd431e943cfdc995e03832b734f6bc6da7f6fb. 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/HKG732249920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3601492eb2feabb59aa3cd50d760953eaa8678a1d7259319c4461f9d211303d. 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/HKG732249921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e718ad6422538bfecfcddba7c7e09530cca5b3a16a6d8dc3e99f320d61bd2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:53Z), 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/HKG732231429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8927aeed7222880813e90510ddb6ec30f0fa7fc6ae5be21ff82df4097cd632c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732219741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3413da3e964a770b3c87eafb5d9b664a120c88d85276bed233d4f31cb9daa19. 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/HKG732291937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6434f3de3a138a0d731d3178c93c265254bd9567035ec0cc8cb4e9a0c7531. 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/HKG732022486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1282bb08f6d4ccf392367c665a9d9253299dffc1eb41c4584aec5c2a47d74. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKD012269158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55a24a04a4070668a976355dfc44fd287303e819670c4aaed7894d8624ac47. 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/HKG732150753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b13c6023598260bf3a0db76c4a5ad1519fb66b359ad67956e9df42b63377e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732152219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55befc5af2e967b43ce44c9278cc12a629f25b9d76dedcf0e83488c6cd676e1. 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/HKD012364969.