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 0x7a41cc74a8d00f4a16fa468bacf22e747fc9fb2b8add82a9a095fc16662f1842. 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/12830168-87c9-49af-9a58-dbd50e37b966.json and https://artists.proofprofile.net/proofs/artist/12830168-87c9-49af-9a58-dbd50e37b966.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 0x887e46684dace6b26d5fd7e5b986f532fa094375d8cf77eb58eab7a89a047399. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRRGE0800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedecea2854de80271941131c02b869a26ad87bb80aa25749347a2eefd4d43e5. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:00:57Z), 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/BRRGE0800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a22fa4a25755991e57fe07d5485d0ed3a872e533f8a646e8daeb55f52edc65. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRRGE0800196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a93a841d833f9aa46f879e49c816c119bc5612804ff5f92dd134b9a8e88eb8e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRRGE0800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db30b67929c965131220ec3f1a5a95d95765990893ce46a6d70d1c9b5ffb0ef. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:02:16Z), 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/BRRGE0800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874ff3621393d39e8357d15410be63673ef9f2bb8ca14576c784851a544dff31. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRRGE0800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8cadc742a390739ad5ff1c3827bc0805e96498f1ec0f045c2a629cf1260e8d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRRGE0800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c814ea782de42973fac9aa754e007e68f313a3363463d7a79ec3ee3b2b7d7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRRGE0900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d0fdbbfe1e2e21f3c608265d6fcc31c7cc951fd0f65b2de70be498ab303463. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:24:21Z), 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/BRRGE0900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab82529b882682ab78b08782ab06237dbdb5e9e590561b05d9fee97fbeab6069. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:43:51Z), 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/BRRGE0900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d279a7a6bad1fed991518b72c42c4755a797892115640552a01616fad164061. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:38:00Z), 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/BRRGE0900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9952eea5d830ef4ceccedf9a4d83c0a58d6dc5bdf404e6e989901d1674f1f54. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:30Z), 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/BRRGE0900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56218edbff99c09a338a342cccdd6472f558eb040943c155c527424725a3565. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:22Z), 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/BRRGE0900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c897ec6683923fdbee2204c6a411f6d452915bd16152965abda34b37d9d948. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BRRGE0900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090f5e41bfa039427d55665809ba2447a7c3dc53c0e05248fe9b831389bf6898. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRRGE1200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac53b8710251dadfd23839ab6ba5e00cd602a047f5d588d7b3406da66a0e250. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BRRGE1200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755d5363c850f3ed0f730f020b2cb97bab4d0028041c55238bfa386592618100. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/BRRGE1200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd369fae4381c930bb6c1bbb9fb4d120b578874a59420a4bcb2c55793f2069e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRRGE1200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d8329eb919c96f2f64e980d47315dbbb945ef8590c1ffdad50a6bca1c6c91a. 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/BRRGE1200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd681a2f14b82e7909d647bbbc9fb8509e227b5029f4b6d59ed800ddfab8128f. 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/BRRGE0900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd681a2f14b82e7909d647bbbc9fb8509e227b5029f4b6d59ed800ddfab8128f. 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/BRRGE0900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3141122418877d579166885477811ea167c9d498886b782561ad6de82ce100d1. 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/BRRGE1200069.
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