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 0xd7ec91c5084ae2924535b08eef2f20b5ea9d0f3c1f30c80bc61a7fa7ceba4753. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1426ad2-ef22-4fc8-833c-4652a0ac0ebb.json and https://artists.proofprofile.net/proofs/artist/b1426ad2-ef22-4fc8-833c-4652a0ac0ebb.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 0x628a7d90ec38d6be708369ac3ef1d1e7df0505f1c98d076ab255fe0302602934. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2B1902785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e7e659d8b7a26e0dc1afe4369af430d193617009a9f2caad5c8cbe58ea486. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEX261700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e0800d020fd994df9b8e301ef95b482c3d2843f2dcb43cac46977c182a81e1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEX261700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f3ae65732e0ac1c97d1f00207e277218208c0e0d80694fc1c813df5491b270. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX261700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259070de35133e41ea18c9a466f291c194dea25ea9230d4dcf1d61ae6ba266b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEX261700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc438ddbe9ca746f41688fef63c43719063259ae53e1a876d8f7e7b98a1e643. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEX261700369.
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 0xec229c0c7c81b7a1dd466de1f444709a11ac3e87da3fedd70dee07e1e2d22f5f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEX261700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94cc5121b939220050ccbb25e74b63f8559bc0d954b82a3153ba7f0e2b2d97. 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/DEX261700372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d614edfe0825767a4d45b8b46fbc92ec91a6ea918553f0b24d155c506ed97e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEX261700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bef5954b81dc55e631dba2312e874921577f657b7dea7cb2c833de096cacf4a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEX261700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3f7d00e65013863ca649979f3f9664e92d2b1f67c6b4816c07f5d80986a5a9. 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/DEX260993204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d881ea949fa051cc60ab96f1f9b2c838cf988d452a93924f93b0c57e9c5165c. 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/DEX260993205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef6a2c4d7b21077e4d4e860661efc203784a7060744e0c36f3bd2568469d0b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEX260993210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe763be32b8792b320ac277783e043456cfc5cef9438da7371032b40d2f9a0d25. 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/DEX260993206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6ce206e4ac3117550553bc70c8aa6c214875c4e10d0b7903a7a4fa83770b0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEX260993207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc6c04ac83e0b81016d53d1c422c7712dbaf1379f2aee8beac15a87d68fafa. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEX260993209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c239237046cf7f2d009db97877499eac610b9532c3fafdf24588758a3e33f4d. 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/DEX261600343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83ac1665e9e0392bd1daf505516f8010c0f8053a7af0c61576ee03283f17198. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX261600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e108c9955a6a0cd3cb7dc4575a0437f2655def71ad5b8c0abee799df965499. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEX261600344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd8eef311863f9361c6ab282f4839a53652eef2026bcd4bcdac62cf4261da2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX260992461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8744941a5e29aabd2da7fc4871a1eb4cf7ae94ba0123402e0c75bde742e74. 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/DEX260992460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120a2078a5f64c96e876d33fa816dc87bb0d59f3b07ca52e93fae5af206126d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEX260992462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180258434926833d5edf6d4b23398849a02e0b01c63347102e3864b86d3f0aff. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEX260992463.