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 0x04b8553b6f931d956260c2179b0852d59afd8f257bfa14a53adc03f54fab1a20. 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/259bae9f-7e15-4975-b650-e2390e90a7a4.json and https://artists.proofprofile.net/proofs/artist/259bae9f-7e15-4975-b650-e2390e90a7a4.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 0x7329cbc2ed242eac971677e3e0dcee2c9fadce7891dcaa14c74b3ad6687d0e34. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4TW2081336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7833962c91b2749df189328b67bf8eb410bbe9c4c7e5604a81de08325fa01d6. 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/QM4TX2053264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c551a60fe707719e175782141d3b222363775ce6632e60490bb5d3a1c6907b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRIDO2111002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c047573276a82aa842fffa2111951bd6ca98e7a0cd44bac2437887ad14f977c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRIDO2111001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955f2989c2634d3c755b5a23de432a676fe6857ead79570cdee100562c47c83. 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/FRIDO2111006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b4fb8ae0ba711c4a5943ce73bdac95584e859837b0c493404eaf416c497b06. 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/FRIDO2111000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c047573276a82aa842fffa2111951bd6ca98e7a0cd44bac2437887ad14f977c. 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/FRIDO2111001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c551a60fe707719e175782141d3b222363775ce6632e60490bb5d3a1c6907b. 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/FRIDO2111002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc6eae93ccd7df252d48aeaee2ac6c97d41e9666b311bf91a63450dbc46c39b. 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/FRIDO2111003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a8825947218ea6de91fda26faacee8b5346dd04502dd546a69d42e229f5f00. 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/FRIDO2111005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955f2989c2634d3c755b5a23de432a676fe6857ead79570cdee100562c47c83. 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/FRIDO2111006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb7f9d13e00596359e9ac2841e615fb83983c6c2c8b56e4b56a161c87390141. 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/FRIDO2111007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1f0c640e14382fe30c8a65bb65079d5ea5ba3b7679ebcc6a6db7998ef25498. 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/FRIDO2111008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c45749519fa63cf1f5a4e5646d7f5c09119a0e687856e97a579878350ff8d5a. 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/FRIDO2111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff668a8299cd630cf6e33aaa1adc0fa9e8c8a48addc3bdc844fff683e5a3a1f. 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/FRIDO2212116.