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 0x6cd785139d4027e175a92398f3da6df12cfd78dd69968efa3b4c6ca6c8369765. 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/fae0cc83-3119-44d9-97ab-e9d6b129929d.json and https://artists.proofprofile.net/proofs/artist/fae0cc83-3119-44d9-97ab-e9d6b129929d.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 0x9e867d8d7cc93cc59f5dd2eddf97ceb852806d893d7a2f9a92500a3df5d74999. 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/UKR6V1930396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cdc2772290c3c6c290cdbe3ff722ab74b1e361ee7617432cbed916a214fda4. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:27Z), 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/UKR6V1930398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b5bf941a3af26417e8acf671ad6f54f0ba52c72e9ea23f51da38f4407c287c. 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/UKR6V2030801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56709e9ed8c97688bb0c6b0929373826223776cf4aba1f02a5a18873f72d06d3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKR6V2030803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a5e3448e829f02618b480fdbd58d1da79faabe810098a9256b57731f7c8eb. 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/UKR6V2030804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510561827a17885ca3f94e790ff730592833edcc3655a812dd7e9121f40268be. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UKR6V2030805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3e8a7f17b5010960da12f3ad4b4a1ecf0f920fc3e6a01177c24bcb056c73e0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/UKR6V2030810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590a62c59f3d18e467ca6d96b88d4b3502a8e1ef1af85b8bd1d127e073c4fa09. 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/UKR6V2031660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33717ace9af25ac9ee7c1d98e59888719027bd0ed244b1723d7e8cf0aad12915. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:12Z), 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/UKR6V2280793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87165dcf7b593dd6628bc6d4759db7e5fe8cca263e5d1cb332df75a186df28e1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/UKR6V2283038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc929d6f51400b1980a59f4e287ebff05c8f1831d64707ccbeac7227c6b1474e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:42Z), 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/UKR6V2283039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb861dca41fd15f9b0472c01f055bff7999304f2055f647a669db433c076cf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKR6V2383449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f5cc87c75e4aef9220b3d46b5d72a4a674c3cad17b76124ea84ca3107808a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:38Z), 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/UKR6V2383450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa770e77e8d7948fb74270dd49f53d3034d32bbd441deb484c750d532d7c2d3ec. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/UKR6V2383451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca1ddca5996be2ff003651527bc3878ee0e15b238cfb998a21dbe309c54c211. 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/UKR6V2383458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd4e4ddf4a0886cc80a56197bb1f0e1e89fbf9c04ef906261af2f9769e83a7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:03Z), 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/UKR6V2484002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0592cc1e16542ad6f57a7651f3576bb66ae972a41ede0c4c0ef8678d8eceb6bc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:52Z), 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/UKR6V2484003.