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 0x40576968ca8fd66f6962096a1ef91012f46ade738aca758914b545814da70650. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/843c0cca-c9f5-4b06-8d0e-66d9f67b85e0.json and https://artists.proofprofile.net/proofs/artist/843c0cca-c9f5-4b06-8d0e-66d9f67b85e0.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 0x9285610c9610c2066b488209e7eb1dd6b707d252d38151ddb7121094542afdf9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUBEC2125587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82796c3bb3b2e8f2407ff7903e87286c3eb15d7a8e953ce0d1cb441e062848ae. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/AUBEC2125589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1614dabac071bf52768bfd0ebdc9719d5f917a15be4ab1c01fd209f95e766878. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2125591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf441b420fd074dad6ac3da79f39dcaec98d66f73a90bc1d5991a206b843cb48c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2125592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e940dea1b64596722bd755539a46c546e6f0162f2800632fcc47d94eb40e031. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:55Z), 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/AUBEC2148284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04a1d72e7b714276db635953d17126ef1412d4fb8ad86049ad9fdb12e8dc75d. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AUBEC2148302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a4e700e73cf81fd95d566d5e33ab4f9d1e38069befc67eadaf2bfb385ea176. 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/AUBEC2148304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37461d0cd12f05c529aa1f1bae1cb6c8f15053305d0236803c84d4854337fe8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2148305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfcbc070cfbe540ca0eefe8bfaba491305653c2cc06c9ef0f43af3be094c2a7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:10Z), 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/AUBEC2148306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4da6dd80cb08f7cf2955a741f29a09bf225fec8ef3a54c30eab9a6b3989cf2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2162061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b282e266d4e530832bf90f19640abd352806ffdce9946c6201dbe83cbf18c68. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AUBEC2162063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc739570429dd8f0a319ec65d41e522f91bf8d1da6d4bcf5160502c45965714. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:30Z), 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/AUBEC2300742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874f8b18b9b0881767c6d42b5a7adbbf0d10f723ae5343756618064497913c04. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AUBEC2300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5db8bda6476c819ca4b697c275efcd3eccb3a23686fc005559b9fcdf2dd731. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AUBEC2300747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e42e40cba2bb01debdf067788476cffcc094a5491d7f6b55b1d43474c6c1c05. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFG2071672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdd8e58c37ec4573cf41fef60228a03e3318aa2fa1474d99ecc7366dc1156b3. 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/TCAFG2071689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80578193f35c07af3fdb83d3ca112cfb3e82402a1143f2f523409ccb3cb58406. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAFG2071570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2790b58e1e9b6037ec5b15e8293a026ae61672990161661a0973b4594764e87a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFG2071617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5925a00278f9b9a685b587e3dcbddd384044c774a49944e4cf173b6d0e18736. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:54Z), 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/TCAFG2071698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e1b2623c7b08651382bf470db56f925627bfa3239422304f7f630428099a1f. 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/AUBEC2406674.