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 0xd637ccc06e605cfccdcf0654f51a4ca58be0811c7dafc7eba19b4cecc5abb5e4. 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/90703b95-ce7d-4294-9fa8-14cc4786f590.json and https://artists.proofprofile.net/proofs/artist/90703b95-ce7d-4294-9fa8-14cc4786f590.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 0xee1a0447d787d0224d322a19cc47556a77724a1a6dcd8dae5c3b126e96e39b3a. 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/FR96X2239490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f4d87dc9974adf7d32c2b85907502a265da4b6d1871ab4cdda7819b18f2624. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2447650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16b7acefab436f192dc4e555b98d555e3454e9d9b53ec25fba65435629ca54d. 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/USANG2447647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c11983f10e3b85d3d2b6246ab3d9029864f4bf150b3c1060c3c6d779fef7707. 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/USANG2447648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7403a2f428f37eea080241d4e133455c3acb628f5df3f27ad9247ce2bdcb952. 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/USANG2425927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf4b915ddda5c9eb41262c12543dcf1f1ee74612f962c37f0b728f3703e3e6d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USANG2415418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5c4b9ce35f0259f9b035008e5e18a60fdc97fe19792ee44b43e040fcb560d. 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/DGA052465504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bfb8f23e5f0a8816b787f8d401eb73ced57815a1fa3905b60e062b47b87f07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2485891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73f6e5a2c2d45d8ad895e79d754c476dc3957e96b24ea9c27499894630e237. 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/US3DF2465671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1bd5f105f99ebb33fd20218f2ca8f97f75f9baf33c24e4d7b7bbbef443742. 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/US3DF2465668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd01e96d6c7866acfb0ac5e99799768b40ba4b2902c0240f091d13595939ace. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US3DF2465669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40276fd0d1eae21842784feb2178f94a6ace84dc5878048fbe978cb99b621ca2. 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/US3DF2465673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17074f0aeafbece500f6e09a849f41cc97f9860e51bae49dd3e633343f7a1edf. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/US3DF2465667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73f6e5a2c2d45d8ad895e79d754c476dc3957e96b24ea9c27499894630e237. 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/US3DF2465671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676fee0439e2384cbe6c47193c850e788a4e38906c6927c415c3569b7ba41f1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US3DF2405411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a13eeb325feecb3d4e74a712c86acb8c567ae8ff83ea7356f66c778f290d4b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA092396417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999660b374d7bdfd1be93ff931578c3a3b6f0f5b18685210745bee4095c8043f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMANG2200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd6e9b8c1663905197e6f3114a6bd1061faf73a41d2a4308c2dcf6703c91b3a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062236552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c93539f1a58e02b80e25463240bf976e4b96cd66a18391f4107ee24f6ad2d9c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USANG2214180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9aeea35cb2d10d25124fecd2cc54ddfbb6333b8bf6c679bdee861df43710a. 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/USANG2209906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149862cfd2e8372380fc48602b92b86cd0c1a028d098e361d59edbd518a9b85b. 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/FRX452288033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f781ff1a5ef09da9d2bc59462c97141362eafa495de39312e53380d94b9013. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US3DF2273340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf070cc552f77bdcfdb375962fbe9b8688c4153da44f9e908835ca40512b710. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX202236510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5f5ebe1b0104562a2ac053bfa4218dcf4301d61f8473b47116eac820ed37f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US3DF2255799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf108b2b0857d06ec8784a7077df796ff84c884ec5f59a41a7865138656f443. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US3DF2244486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b74dc0fdc4812e8de74f88944da771dcc6626d2e7bdcd07163c9365b5d2fa5. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QM3DF2210358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe816d02b6c2f1ee5d4cdaf21548222ea9e3ca340541b50bfe7ed472f0f8b7fbc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM3DF2210356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61279fb1ece67cb9ef49b0f8d8014f019ee69f46a0559870cd50c1859075d1f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3DF2201818.