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 0x7d6d9e0315046192820dd5938ace005ce5b87c8f91f7f3ab066c91d47bb65a13. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd0be819-66a2-4448-b18c-84908278ff5f.json and https://artists.proofprofile.net/proofs/artist/fd0be819-66a2-4448-b18c-84908278ff5f.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 0x5cc4c6a5fadeed1aeb17d7b7d9dfc3dbf1cc197c315208377ae1d3cf454c9336. 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/NOBWW0208040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d85d86a7917b655b54596a940da1454e2a118373aadbff4906d9973a97329c. 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/NOBWW0208080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da0e8dc446f92f92f9539d5bd50e4d62b2e39782fdab8eeba8dcf3290505fa6. 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/NOBWW0208100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a7739bca85e881f66ceade0c1ba7fb5bc28df9a949f5c7f0c8d9de397eaa17. 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/NOBWW0208130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1f755823df37ccc68d4a1158ecd01b32d33695179dc8a81d4a7e6006161a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:37Z), 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/NOBWW0104090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53472f6ab8655d8f6804e6f9bc3e175792775f861752a8c34258cd811a7d2c6b. 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/NOBWW0208180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de659e8c1ad03bf716be008b353bfa1bc11a3311a86791e17eec03ef73b1fc3. 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/NOBWW0208200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb0c6a0b65329c8fa1e18df526cfe397f3a37f62c0daa703ed5207217fcaa02. 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/NOBWW0208220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1768aeed95a8d389999f38c121ccac2e1fecb745d04f0b18842858c58e440. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NOBWW0208010.
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 0xd22b4586559142886ad1e8d0e8922ff80d6da14b4152d97c8cfda3fdb68b9490. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NOBWW0208020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950bde6fbeee88bddca31837fa2b6ac5630f1d784d786118ddfacda649bd3be. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NOBWW0208030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143caa474194e9df028a765e981bc858acaabac4ef18fde06e34b47f2cd2fdf2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOBWW0208050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43d523937b391df7bd967fba163816a234632ca0ec5127a811c4a4d2277682c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOBWW0208060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a761a4bc30cbdfd9e6d8801df3f9ea6b8f32028d84f8e2e56bf31812c686f2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOBWW0208070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a1f766f85f6692058e9e16d9acfdcd3f96721d9e63e00e35ef78ccc37db13. 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/NOBWW0208120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d8713548d41f48337d6a15dffe8dedae0e92f6bdc86070b24a3aaf4cb11766. 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/NOBWW0208150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12e1655f4e9a2af17a443c10880ca4e95e485f7606a25c236ad09167636eb8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOBWW0104010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182b2086fef6c83239c33cbf08d2a0b6f2aea97580502d7aff4dfd9dee2c35ad. 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/NOBWW0104030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1f755823df37ccc68d4a1158ecd01b32d33695179dc8a81d4a7e6006161a5. 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/NOBWW0104090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a2fc7c2aa455e646caa4582e498dc928f63ed6d1af0f20e2747521f5743646. 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/NOBWW0104110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4249e9faf70d88482ae420fbdc4bb9f89d1d0aabc5494adc959f789e2400339. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOBWW0104150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e501a940c535e3f9fa5518216a9e4fd1377be47bbc5ca9dd19689879ae654f4. 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/NOBWW0104230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e793e392584744fed625469b98ad9fe1671f71c8a099572997334ff70e2972. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NOBWW0104070.