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 0x067cc1666cc378d33ef7f3b701dc2e09f1181e30ae463a8b8e6e08df089b2936. 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/1305ff44-5ef8-4683-bbf6-c2531d7e6ba2.json and https://artists.proofprofile.net/proofs/artist/1305ff44-5ef8-4683-bbf6-c2531d7e6ba2.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 0x6cf3af69a05a0b11d2170244de56f16a4bbde526b4e6d7d29444c475c9721d23. 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/UKLVE1900497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ebc545f7bcc378d34f9c6282f3153aaece12680da153e29afe76c33130bf8. 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/UKLVE2000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8398f33a2d92991dc1fb03b778cc48535fca82017a7410bd5e55a9f1ee91c0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKLVE2000614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eedb3b64834772b0625bd9e8f97fbf782aff82ebb520a03789f8938f6c1fa34. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEH742041299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ca15587416da4803282ed13df992058151f30ece05c2f8484d46d6fdb4aba. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEH742041302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a61c9067f24bfbb188f21a9267d7ec16aa18a2f3327581e2de008632c14681e. 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/DEH742041303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6377e7ee149ec5696822a2f2580ce5a633ad1a6e449fd4ba0cb16d24fab416. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEH742164241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e7e1688e9aa232b7d78d75cf1ae68194a004082121dbd91b0d605e7a5dfac7. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:11:04Z), 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/DEH742304915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b60a0a5df203e5e31aa994808e5bdd75e9f3265c1383039fae9b532194324e5. 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/DEPI82220499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39fd7f31a32e321ddf51dcd61346a69469bb696707f1764f6f24feda5032d9b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEN062400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7339b56abee6d043cdc8253d3a5f49ac5aaf2ef4034db96a2998e7658efddf0d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEN062400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a2afbd9c7df5dcc27e61dde3c1b63ded6cd674d69893bf528927a948212f82. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEN062400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7114143fa9d16703b32b33c2d59087c544eab8aa816393d66ad66b0da7759ae0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEN062400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a2afbd9c7df5dcc27e61dde3c1b63ded6cd674d69893bf528927a948212f82. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/DEN062400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2212a8ac5c7a17ae8f028bafe0da32a9e371e19c15067d14caca824f9cbd8de5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:47:11Z), 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/DEN062400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34401a7818eb2b2fc243266e39860919fd4464c750669a6aa46de298ed3e04f0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEPI82502536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eedb3b64834772b0625bd9e8f97fbf782aff82ebb520a03789f8938f6c1fa34. 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/DEH742041299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35d1fa79737acd226d4b982e795e2b6a390e8c378ff7c68ad4ee134cfe4bc6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEU672301393.
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 0x14d068521c17b67c0aa94fa2ff623d2d4195d2ece349aa4f99fa194b9cf086fc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6N22097177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789df9de4d572f3fca35a19870f4527decd89469bfccc6361e33d0c32418c180. 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/UKLVE2101082.