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 0xae85ff63f305372d840cb61602dd7af3dab320b9c8525efb02e144b77720c240. 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/e6c00777-bc48-4a81-8783-055cdc3b485b.json and https://artists.proofprofile.net/proofs/artist/e6c00777-bc48-4a81-8783-055cdc3b485b.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 0xfe87fc460c6c43c840cc1a95aea5171a1ecb3449e0480b0bab4750fc1a8fe425. 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/US83Z2321000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21e33894ca4b22f06a5e42e9259aabc69764ce84e897ea7c458d12a0f03b5b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:35Z), 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/US83Z2039395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56890930b82c7cbebf40033a03523fb420d6ee1217e6c3aebd0d22184fdc3948. 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/US83Z2459659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84964615492678db1bb8e000eab7ee0c9ef1b88f71c787e0467975f74ec75686. 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/QM4TX2420676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0059a687f12a3802c2da33c573f7c4cf54333eb9e104c9a38ecf50ee96d0f76. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GRSCM2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e131b325752921a6a9766a8370b685bf732ac454978d8632ca77ce930485f35. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US83Z2556420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d75ca1024088a397cb1639175909097250c17f4dcd217afc7e8345f8ebe179d. 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/US83Z2460628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf50e686debdc64dcbd28faabb69eef438132313938050cfc567cacf9aab31e. 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/DEH742162867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe87fc460c6c43c840cc1a95aea5171a1ecb3449e0480b0bab4750fc1a8fe425. 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/US83Z2321000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4b1eb61b539d777d8d618c981d640f31aba38470bcd130cc69f9522ffd835c. 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/FR85U2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999c15f29d08810246b6d754599928f6caec1d49ff63747bfe6d16a152a2b8c. 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/GBWUL2080590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dfd633b6e29038a979a4a31004e45a61b4e1d0e38554ac8c8990f464a1974c. 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/US83Z2133517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ecbaecc4dcd717d4298748b8b8cd518bd47d1a74b1ac5d396cd58db54e6ff. 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/US83Z2334840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef181ad0d39e732391178e430e43de64b73ecdeee27ae0c6ff8fcc6691b25ebe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US83Z2334841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f7dc174d743f6c0a3d64a541d678e60f01d8ad9539dbd615ef2efd6aa6088. 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/US83Z2515267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a79b89398c1982afc2bcbf797b54ce7991145301778f89b660aa9933294d478. 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/US83Z2515268.