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 0x357a86b490f121ee2bcdc7668d4b5e212a78211d0958f4db8983897de1d8ccee. 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/3c29d378-e052-45be-9a45-ec39d7d948d4.json and https://artists.proofprofile.net/proofs/artist/3c29d378-e052-45be-9a45-ec39d7d948d4.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 0x4ffe0926c071040c97479bc542f89ad447c219cbae3030c47fc7056e696e3e06. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5Q51800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d63b7a7be709ab63035beed60918823b5457a09f96afe6082961c5b7fec949e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SE5Q51800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc993a244f1474093ec8a1254d42c675b498acd4809fb67369d666c4283207d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/SE5Q52000553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7a08a777aa7786f9d88ccfc50383140196b42ab8a189b65fadc39acbaaf603. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5Q52003792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87507296dce0963cc4c10a5a39fe14333d5d3cd0b8695d0027c9615d2999b13. 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/SE5Q52004078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33b53ba0e81a500828561c9591118ae49cab8003a943cec975529564341cdc6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q52102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a16db82002756c7106d03615f9d3ee292027e59cc59f5f8e3719c7aebf25b60. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5Q52102729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d927cdd8a4a78cfc1b2ceba9416b11fdbd811dfc214c4d3bdaa2e2bc4e0d5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/SE5Q52104398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d81d6f819fc75946f6a50b35261cf423451b04870db6f8b7b41c82ebab1f0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5Q52201824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6099e6cb4c9382c76274cbb4c89dde9add9ee25da8921066025de7de78b54d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52202655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d0af88550f52f63ca88dde099d8754d5f2f32caca6cff83c6a20eb61b3a4a. 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/SE5Q52202656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe693c1536c616561b1b44cda8cc65c4b66d1968db856faafd5813498d567b19b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52203640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae532ded8912d0d55574ea1d50b28897f0e1cd985edf4ec9b3826874c0034bc2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52302784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74942b848bab5d57848de19db2994cd7e9af6c661148d56b55076ea166c8c6b8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/SE5Q52400788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe062ffb9a3eac78d8c48621f061f4cdc4862e2e438953f36a5d0c01638bd4b52. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5Q52400932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4efe50208a6bfd3d3ae1b3662126547ad489f44f8f3af18373031a76ee021a7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q52402428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90feaacfb0c338f3070b378a3078d48d152831f71348393eacf874a101dff2e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/SE5Q52403015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb077d9eef2dc2a0278dfb21a21ebb63142dd89ec7918d1770895782221c1767b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52402800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb4d8cd33dfacb3f35532b9a91b8aae9597c65876bbbf69325f6b777a703f68. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q52403929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0323921074c91d854685e5b543bd5e0e7fb0e66062d1a6fae26a3eb104f92fcd. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SE5Q52403892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62182076ac67430f0bede6db401f6545909c9dbc4baedefd58083adc673ebfe9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE5Q52500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd3a99c704a38708481e666699d70db502681540d16b1886e915b5897af382. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5Q52500850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b181180150f20fece830e741734a89355f070a3f95cd07a676ac01f5e77170. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52500851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c74a6180cac2780a061d3328fa2bbaf249e8c500a85426c0e0698b73141e3. 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/SE5Q52500849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3cba573ba9ed0f0d269f15aba6762c2a706d87cbbda8a23700de5749fee78. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SE5Q52501372.