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 0x007b825e71929bdc161dac975d6cc9d4d4cc8ca54528d920b72f10e651392cc0. 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/582afcbe-b246-4588-ae75-ad83532c37a4.json and https://artists.proofprofile.net/proofs/artist/582afcbe-b246-4588-ae75-ad83532c37a4.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 0x7e6351ee0f24b0da62d84580bdbadc2e98b53183757fb3043ebf539228ee52f1. 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/USALH0500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb771436ed48ba0bdf55ce25a7a6dae64b59f9d1b09c173f3c97a26e42654c1. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USALH0500393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f9f3efe3eb1c62cfaa46dd73540bc0078fe15caf0bef44cb2b7d4303df97d. 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/USALH0500395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918db1b56db7ed43ab9855e8a4b647ed2fd7837758134270bd2dde5e7c9f93a9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USALH0500396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0f339599a63fa9ca51644c3ab0b95674a1101683a16abf725cb2987ff2c72. 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/USALH0500399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f0cebca99f5cd387e9954b0143b22adc3aeddf1d27b803a37424d323ca0a5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USALH0500392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb0f339599a63fa9ca51644c3ab0b95674a1101683a16abf725cb2987ff2c72. 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/USALH0500399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3044c1a68384e546885bf88261575b758678b43f121f1e0901c0fe427d90e0f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:19:25Z), 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/USALH0701814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685a8b573d73751c757173deee5e7f23ef6417116cadd89beb08dc6fc6f47457. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USALH0500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e35df003db8d81b56b8ad7f0a4199f38b3178cc2f12405cf99e6a579b6db2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USALH0500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce32b900a9c7738c640dd8f0b7d97c20414560db747a14fac5af2c1661520a83. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USALH0701729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b2d73f3a5744278500f1eb85c11d5e3e12e537a56b00dd245d934b758f5cae. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:26:45Z), 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/USALH0500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd595c4c94df11f14ccf97410338e5339299335889738b6438fc72ec7f49a5cd6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:17Z), 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/USALH0500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c661e3d03e1b71626e03864e5d92f77bc7b8f7a26cb499bad61b99eb1bdad8d. 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/USALH0701817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351098f54ec3b093f00e7d3db10860a00ad32f613efd819b6511372570405343. 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/USALH0500091.