thumb|right|200px|14th-century wall painting depicting Gero in the church he founded at Gernrode Gero I ( 900 – 20 May 965), sometimes called the Great (),Thompson, 486. Also see Lexikon des Mittelal
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x2f2e7ed6b9510a8c066e54cd1497de56cd9e284b7a8fbc3fa71107f9fdc9d50f. 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/95859f80-4092-40d3-81dd-4bfdf5b89fcd.json and https://artists.proofprofile.net/proofs/artist/95859f80-4092-40d3-81dd-4bfdf5b89fcd.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 → block OTSBitcoinBlock must exist at that height 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 0x50eced103e9850b976d6210ec2c8bbdc5c01cd3350f9626cb58cd0093ef4603e. 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/JPPI01451610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9e4d9f27e628bfb13edd304fa0028d82fd0cb645a03b852a381e36ed91c2c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPPI01451560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4db3e0202b666fd050c3cba5cb4822ede3c53a051d198a328ac03aa7a56575. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPPI01551240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73644324d37ab331434abc846613f3bd22af1cbfbb908d5d457c84d25ba2ff01. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPPI01700990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c197e11eb6d85152910e28f990cc84297f201ea453e5cf91788a265c08bfe32. 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/JPPI01701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73644324d37ab331434abc846613f3bd22af1cbfbb908d5d457c84d25ba2ff01. 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/JPPI01700990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3842f7268c1f701854354e3dbd5eb0cd3b9a06b59c4b8f1a45f06a4751987d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPPI01701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0787036d0ca2c5569ca292c7179d80be34dc99362504f63ff77e8c75f3199eb9. 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/JPPI01453170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a38c39e69e6e7d05fb36d5f2ee0e4c7287e8e26e4235b9d374263f3861a05. 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/JPPI01900770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab8af9fc64120ea9232a068831f4f24e1cd70435d50ebdddaba254a91ad7f62. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPPI02001560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4f1bcb0bd017c722946c999df0ea4f47f929b54ac8d216af6a197ea3176152. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:01Z), 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/JPPI02001520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab8af9fc64120ea9232a068831f4f24e1cd70435d50ebdddaba254a91ad7f62. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPPI02001560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904fdd5446c3bbca7542e8d3d8638455d28cf7fd2717a3a0e569c7f6196f0b2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPPI02200790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ca10fe511a6e016acfe0fad3aca1294ecbef1c08f40af8234af30c7225e81. 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/JPPI02201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadbbbaec4a4e926003398aebf64206964d5bbfc9e92474ede101f3b3deed903. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPPI02201890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc7dedc9ad50cfadcb3e2328498816061a9ddc7f9b82c6309411834ea9ee64f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:44Z), 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/JPPI02201910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ca10fe511a6e016acfe0fad3aca1294ecbef1c08f40af8234af30c7225e81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPPI02201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd798bd6aa12e5b3545dfdcae36be263f41d9c4d53441e467d6c3e4d239d6a756. 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/JPPI02201960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ca10fe511a6e016acfe0fad3aca1294ecbef1c08f40af8234af30c7225e81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPPI02201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd798bd6aa12e5b3545dfdcae36be263f41d9c4d53441e467d6c3e4d239d6a756. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPI02201960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ec95f6dbf3f2f87d45de2c6d6b1139459c95e7c39d702fb0a19c838ebaf24f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPA652306310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba587d1b14ca36cfc0a774af79fe28f3e5e4c984ea0752e06e014fc71863fe76. 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/JPA652306313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c2ee524e1bfd5f74235362485a34f0ee86d3d866d4ae74761dff4f55e2c7ee. 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/JPA652306309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4495677c8939323176887a353d3f77f77b56773029c59fb998e7729b77f5b237. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPPI02302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda227c1d0ecc90df17bc0f4ca53a6ce9761c0d3b0123e732f66f92f3a952cb1. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/JPPI02302430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350caf950fc34fd89da16768d4f7286b59d420edbe9bd10aa15a7f6c3c2663b. 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/JPPI02302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f26c1e321ea72512befe99ea95a164b0083ec8a01a41349db27b6b5e152e2. 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/JPPI02302470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c5ead65f2b735bfb05d5b043d6d4c522cacf82ed0dc28340988bbe26b9f71. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPI02302480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350caf950fc34fd89da16768d4f7286b59d420edbe9bd10aa15a7f6c3c2663b. 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/JPPI02302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c5ead65f2b735bfb05d5b043d6d4c522cacf82ed0dc28340988bbe26b9f71. 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/JPPI02302480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350caf950fc34fd89da16768d4f7286b59d420edbe9bd10aa15a7f6c3c2663b. 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/JPPI02302450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f26c1e321ea72512befe99ea95a164b0083ec8a01a41349db27b6b5e152e2. 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/JPPI02302470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c5ead65f2b735bfb05d5b043d6d4c522cacf82ed0dc28340988bbe26b9f71. 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/JPPI02302480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd9ddf19c0a5859212b696275f70f06d4ebbffc12ee1d4231e38faac732d5e. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/JPPI02302490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00104ecb8018e7c3543615e69b52578f161ac69f6daa94f5218f13611e07efc. 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/JPPI02302510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b289f20ef4a4952c448bb87c42ade98baa4426d84e246f3bfa005373e2b852b. 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/JP92U2400687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33331650cab42e01971a2b90559422353623b841c3296651faaae5e1ab23ddd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JP92U2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a502fc98e4da3988c7e35fb27d8dfebb5abfa17141f2667eb9805db42634cfb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JP92U2400691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fef9a053945ad672662773272e65d42f09ddd926263475ad33eee8b502ef85. 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/JP92U2400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33331650cab42e01971a2b90559422353623b841c3296651faaae5e1ab23ddd. 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/JP92U2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189b0eccda13d9981d3a87e9cb285b0d6f9505e57a6202306068f01b6fbd1d8e. 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/QZFYY2089350.