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 0x019f625f03f3105dec9fa14b47dfa27bec74a33c4219ad1dc8761580d9954ccd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89d07a97-98cb-42bf-b771-b2156632e668.json and https://artists.proofprofile.net/proofs/artist/89d07a97-98cb-42bf-b771-b2156632e668.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 0xc01c0c4556701d11f7751b2b3abb4930500266e741ed4748b6af569c736b7b7a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN52315753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e411f2eb01580c9018429bc6c594d389423d54a704e00a89b90ef18666b183. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42170025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7a337d332e9ecae85588401eb4d6fc81f94ea6ab06988f553ea6c8daea3198. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:51Z), 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/QZFZ42170026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe130f0639215c3c878e9473f4ca543519bc579e00889b12cf3ca56066933f27. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42170027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b1b0387bbe028fa4935e630fa03a6f31912ecd180de7899d1c0042271cf3dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ42170028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c4a0a4cd249eee2e74458c9f694bb1dc4aa8e568db2ce5545e9afe34086fe3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZFZ42170030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd123b71ac45b4d25e70fe97eb76091724448dcb0e18775cf4f81d360f8798b10. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6N2105298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6051ac35900840aa67c61e2b68e668b3fadeb9085d18a0cd536b8de8c0e42e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN42242498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0d8d5bd637fd976690b24425c19642ba55d9456093e13d0be24abb9c5897a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWZ2234268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbfb5de3691c3f7cfedacea16c2a8f58b1d1487cce466a03c195a64bc58141f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWZ2234270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf023d25c1dd7b167d2b0f695551a9a515d51c86f29cf36151a856c1575d64ef5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZDA42443657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88939433b33f83d5559e52f9ae0986c90ed28497f19623b4f65d2254e8ae300b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QT3F32442254.