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 0x059ea0bdb3237bf4baee599c4278ed1910299241ae6141cfb3d0a1758cfc1da3. 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/182cf7bc-7b42-4991-9c31-7617f31cd535.json and https://artists.proofprofile.net/proofs/artist/182cf7bc-7b42-4991-9c31-7617f31cd535.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 0xd5ddf8a4bf94249b45bfef0e0fbf277f8a30817383538fdbd872bddfb35b5905. 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/NL7DA2300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca38503761b9e355b6f6c3c732f8f0ccae04ceb1b917e4a47e0bd4b771c93f3. 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/NL7DA2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751d21294b7957d10246f0b8088ac6d8f9ed70d53016e40f3ddd985c3dbb97d2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NL7DA2300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d11c1fe507b122beacced324a82734bd03c2920ee78802eb665156b96cc03b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NL7DA2300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391edd996c601dc9c6d8241d89c442e88433d468d1e69466656ffa6d0fc58d98. 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/NL7DA2300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e04692812d565f1959004397b24992d5fb46b08c059e62550060fcf24b5c5. 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/NL7DA2300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54b2791f68050e1b251b0a175f2d7d889d87a1cc9e67eb8bdc96734c5a5eddc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NL7DA2300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89c6d7d0098fe8b197a3baefc44163285b2005273391ce688412575374e36da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL7DA2300575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeab21b35416987955e95bf2562da21f0929812d6c1cd498267da173fe29a6f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NL7DA2300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26e7b06b0a06366591fd2c4593e0f2f63e2b6059ddd146c6d9822dbfd263da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL7DA2300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54b2791f68050e1b251b0a175f2d7d889d87a1cc9e67eb8bdc96734c5a5eddc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NL7DA2300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e04692812d565f1959004397b24992d5fb46b08c059e62550060fcf24b5c5. 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/NL7DA2300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef2b366cad168fc00ddc37deb91fe354aa0a1ccfbe3d8af1481e42f9b1219f. 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/NL7DA2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6efd6568e6eca99e004a0fdfd06f8bfb9365032fc0378f026f1cb208499d3cb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NL7DA2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86801fec34b9463170d99456516a9c3db35f5dd02e49a2a91b2ffd6a825de642. 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/NL7DA2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886f58e2f320607235ef6bdadee4eeff3ba33f3a14f2808e560a623bc935ad07. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL7DA2200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5be4e72dd874688583411be9e0af42e531590363df79444a32c1a752b53b3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6L2007721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e06c1e7458a0741de4f4717fda9ed9d33abeab39466fdefba4d806f5f3cfb70. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZK6L2007722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cad4d6e312b35d27b332ca9e71f4b4925fce43bc9ecbec591d6b3710efa2357. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2007723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf4c2093fd5814959c69db9252484c65aa95841b9ec42a58bf7c49b79cc62cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2007724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16f203966518297505ef180c21f354c303fce525683dda04187f611aec8599a. 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/NL7DA2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c81845c69797a3e02ceae3e7c8afe2eb6daacc2f7b1dcad42891df3cb5e47f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL7DA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b94b16da1a8ae50f43e20cbe0cdffefe24638abab1c18934a4ac7009ae89e2. 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/NL7DA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c81845c69797a3e02ceae3e7c8afe2eb6daacc2f7b1dcad42891df3cb5e47f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL7DA2400026.