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 0xbd7cb28fb3ff06afe59c9ab479c46f0c5124ae41ffcc1642ebc4d586e2ef09a8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/900f3882-9ba6-4707-9bee-a63ad4e1ad1f.json and https://artists.proofprofile.net/proofs/artist/900f3882-9ba6-4707-9bee-a63ad4e1ad1f.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 0xdf2fbef8c2e98fca50b2982b1aef5eadfd3c993ee006bf249eb19c251b1cdade. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CI2DY2100470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c126c28d87c9a37180e4a26cb9b3263cbd8ed2e98cc120b96bcee21df89057c. 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/CI2DY2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb0fe3f0406ca0035af7769fa4d9d3a4d6e170bc3f1a92971f9cebb440b47d. 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/CI2DY2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416a158bc0dfb619c2481f31e4bdd7c1051b21faaf5c49bfcdabca110e860c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CI2DY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2be85a6c405a6e7cae4b086931bb529b115791b32b2605adcf1df29ed2379d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMFMF2355271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629e92c8cdc6df8616669a169a7bc38ad93dd3a10a7dcbeb7df264d189b1c84e. 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/QMFMF2355281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6a3cb89d5a38b36c6b12121a848c4bcccd56b9b172c035fe3168984dc77388. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFMF2355330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e1e2cf7f193fb21aaa286cd499079d3323c8ca2c71689e2380a2655e9d3eea. 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/CIA3N2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a870a0579dc7309c6c5ffeb0369983f1a8d05c2c87df12f40a04ce14cde8444. 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/CIA3N2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1535ff7451e83d825ed992f78ec68d18eca55265fd89b2c4affa7a3354bedd30. 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/CIA3N2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc443a6b5cecb6603becf19164e65c488b39de55a64ffde4c65e47ead7a0ed7b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CIA3N2400008.