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 0x61a7bf09462dababa8f29d8b6832d063d8afa455f04b00a63d7846a508141efb. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8ea3582-a442-45c9-8bf6-fdd17f3fd48f.json and https://artists.proofprofile.net/proofs/artist/d8ea3582-a442-45c9-8bf6-fdd17f3fd48f.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 0x8b4395c13b293727750778d7479f304591785dac754ecedbbbbbdc87aa2443ef. 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/QZDA61916838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987704431ff1241468cb1971b94a1f679ae511a7d375d30cca53972fde2935f. 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/QZHN61927206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7bb81b0647adddd39b05a99c1c53ea5d5128dd638c394df0191322d20aa40. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYY1984456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cac89bb19cd7a95d698d8f8ad6889f5ed6e3ad2fa8efbafdef5e27e4fdadd. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZHN61938838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580fd28c8bd84c7f6a40eee961faa8dfcfe2a0194cf7c57dcfed524bed3a21c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN61938839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626fe6568e3f9d50dfb71dd9c9f973b6f45abd217346f241ef240f21de7fc3b9. 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/QZES82235988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18324dcd2345e6a2952bf90a3162a7054d52712de8abb01a02b733a0b5d079d. 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/QZMEN2163353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09fd475df8728e1cdf5139b177f5317a4c91ba20295b529cc18a16730f668b. 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/QZPLR2164915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09fd475df8728e1cdf5139b177f5317a4c91ba20295b529cc18a16730f668b. 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/QZPLR2164915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18324dcd2345e6a2952bf90a3162a7054d52712de8abb01a02b733a0b5d079d. 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/QZMEN2163353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18324dcd2345e6a2952bf90a3162a7054d52712de8abb01a02b733a0b5d079d. 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/QZMEN2163353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe45741947655cc4c167fc66fa3888a9488bfde8ad7d9a84119b6e16193586. 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/QZDA82022394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe45741947655cc4c167fc66fa3888a9488bfde8ad7d9a84119b6e16193586. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82022394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987704431ff1241468cb1971b94a1f679ae511a7d375d30cca53972fde2935f. 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/QZHN61927206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7bb81b0647adddd39b05a99c1c53ea5d5128dd638c394df0191322d20aa40. 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/QZFYY1984456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4395c13b293727750778d7479f304591785dac754ecedbbbbbdc87aa2443ef. 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/QZDA61916838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb5ebb04926331d5947afb2e40ef02a5b04b9d6a73a40d45f2a866186e1ad17. 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/ITL461700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dab005a95cfc7bfc67e55b7f043d8a74ca404f2ec802da78495d6b15bb36d1. 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/ITL461700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3ce9b5a67f72b2fd196a92c3977d12f96766be6b97741d935d0f7d4064b9a8. 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/QZ4JJ1643338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea6acbedda6bb8edfc36f518f24cb7f46c625cd8432190774063d36a95f5ec. 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/QZ4JJ1602536.