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 0x5f17d729cc58b177fb922ce61a701e4b1ec0134253c737d80670821d264a1d52. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bd71f3f-a85a-47ab-a685-5dcc4837ec1a.json and https://artists.proofprofile.net/proofs/artist/3bd71f3f-a85a-47ab-a685-5dcc4837ec1a.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 0xd036b0a97e2466240eb3ddbb10d4a78de370c54aed123827a7923340d9364ae5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX202124906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aee026da25a2ce264e3d763abee130ddb2b3526db4048bf806e83f967ca9f1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INS922200579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a9c7c8140096bea2c08f1fd5e4d40542905dd2c5aa072e1f631aab69baa8c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ING642202153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec978a225246d27b3017868579ebe544c3bfbaf6494411f99440bd3097b0c058. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/INS922200723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96873c5b006cb73ed05ab2b10f778c8bc6415bc3fa1a44cb0ddc450023f73800. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X42320969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53e5895369fcdf07c211ef5df8d59425b725c6fe2724f28cda686965ef064e8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:42Z), 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/USCGJ2308615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b98c186d3e1b58e73a1517ac30fb64604331eb6b161e496ed9fd2780361bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ2308617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d189d394d032bd9f28c6023cb757a110a8c75d46d1d5e6153c3331a029d6be5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:44:39Z), 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/INGC12300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efea17ec14bc15082ac8ed5b518826c9092334bc329dc21772af0193b7471b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ING642303342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d5eb9ac27fbf52d1e5f6e72294319bcf3a8695e38aa8e4a06b24437c6d88fe. 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/QM6P42372822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4f2bf747fa197b96c843263fa1a1e18cb7bb596bd6b0a51507a7ed1853791d. 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/INGC12300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a03491d36cc1e8df9d0d3170801a47402a6368ee4382d28623eb2d6483a27. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM6MZ2441189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f52b67102f9d3b11fd046957b70fe7bd33c8a3017461126081669226397b3fd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6P42488775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0cd4a84ca086f0cce87230350fe472d2432d7080f5df4c4f5ae90a2a16a65. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR2X42510573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf152414a184313849a7e16c6834da029de28ed4342728c95d775396fb6403866. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM6P42582428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a758981e49a021f4bf79e49bd77ff37f6acbc742e469b3482f2ab4c0e0a833d. 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/QM6P42582121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4fc70ba950fbaeef799d378c058d0c88183227c3a1129c88090cab3bbbbc18. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6P42582570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debb8d5e20b3feac500425df4e06aace1ad739fa5e655ce25284320c9d078c6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6P42582371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2488366fe8c22aa6e1f0109296b88ede344add62e353b84b4f01ce2778096dea. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QM6P42582515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30714aff4c9db12e27f9807cd09fbe97ca85807ed46215e1509858224fa00637. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ING642505744.