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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b939e4e2726f0ec6b1ba1a295c77d2e63ae27dfbb3c2de19560380d155f9c76. 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/b3d526a9-1fb6-4297-87af-36f67a4a24a2.json and https://artists.proofprofile.net/proofs/artist/b3d526a9-1fb6-4297-87af-36f67a4a24a2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf761df9b4bd49f271ca7421ffab7c239a52f351fd6c8f995f4cbe2dc2917da3a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:15Z), 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/TCAFL2163091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ff5e923b19dc63171bd0bc44e39a1ca5c228992424317362582851425cb9b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/TCAFM2194899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409e1a3652e888b4b81b5628e96b693d0cedc65f02b71d4a0a750ddf0aea344. 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/FR9W12342120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7a79377f833782be7f8c979d5e417bb9fa97f2a35db3a6ee7445cbfb2645c2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR9W12330918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d3ee67c586be861f3161e2543ce4a030a58dfcdd33eeafc97f092bc770dbb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR9W12342121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef061b6ec81edf9089be1a52986336a7556f9438d82e3ba72d39cef59b34f4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:49Z), 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/FR9W12342125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886fee2328600c98fe58f872f697453cc2ad1cdd533da1e79f0628c95bbe9a76. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/FR9W12342128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64e83b2d54a2e4ca1da2d8f6c4608a3a0fe4dc67b18daf27fcfc67ca0728ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:43Z), 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/FR9W12342129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409e1a3652e888b4b81b5628e96b693d0cedc65f02b71d4a0a750ddf0aea344. 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/FR9W12342120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7a79377f833782be7f8c979d5e417bb9fa97f2a35db3a6ee7445cbfb2645c2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR9W12330918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c598f330eca4af1a9ebccb83aff23528f527bb9689138fe6af7dc79234198. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12338560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d3ee67c586be861f3161e2543ce4a030a58dfcdd33eeafc97f092bc770dbb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR9W12342121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4fc2dbbe316900754b1955f78e32a87a83dfdac581ba3a79ceb98cd185e047. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9W12342122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bba8e30f801e2febd524290a511d9e1c083d01d85b0c6dbdea81474c639efe9. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR9W12342123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ca4fd768bef364e36eecc67513871cddc045d79e10030ecfec89e0c70aa16. 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/FR9W12342124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef061b6ec81edf9089be1a52986336a7556f9438d82e3ba72d39cef59b34f4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR9W12342125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa30c95199ae9af74ee9c2045b4d68e3b3f1bbe1c68b823911ad4defac7aaf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR9W12342126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14778480c28367b8e36d16a847da8c368b6d6aea27c0ce214bc95ac8fc799c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR9W12342127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64e83b2d54a2e4ca1da2d8f6c4608a3a0fe4dc67b18daf27fcfc67ca0728ae. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR9W12342129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d22098b3c4faa835cd4c8b254be2283a9e24fcb68470a6c476c524ae98f3d5f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR9W12342130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cf2eda615c223921131ba46801c7660f00c45eb2d224f2573cc49969283049. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR9W12430166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02756f2765511560d36f9319494debfa885f7ab8efa61d84c420a4210fda853e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12522738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86e2899fe6af8af37d0a0da84f88f011a9ae4c45511f2770e921270104c2b55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRUM72201535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4699a14c02d481be4621a2fe925e031c12d61bbc35171bff77cbd0686fb89fe1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12234676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c892288b420351324a52bcfa362993768cac634f2f078769525a8d88074971. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL5HJ2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a260332306d2727d3612437c1962f183e33d16d9f79a1552a98cf7961c7575. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762125251.