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 0xb05f38f93293bcceac2c8edae826d046c79e4273d3307d228a672700ef318050. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b785982c-e60c-497e-be55-9c4a1bc4300f.json and https://artists.proofprofile.net/proofs/artist/b785982c-e60c-497e-be55-9c4a1bc4300f.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 0x7562b625b0e4fc08b9829ad242cd70f7bcdf8af3f2e34d277fbe465e78593572. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2152219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55551db3d39ab5a3665d16718c06fd29964dcad00e2142c839bc6fd5765a555. 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/USA2P2159761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562b625b0e4fc08b9829ad242cd70f7bcdf8af3f2e34d277fbe465e78593572. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2152219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb108739bea6ab2478f33b4b9604a927e6f4ec6bcf05f3db79cf42856f930dfed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2159763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc75d4fd8039e02799ae6cd90e75a7556d56eeb06cbdf1e41b809dec693e469. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2159764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda90c1e423a9dc218eaf9af1e1e4a596e71735b60e097b78cf00fc05365a1c74. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P2159762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caa11e3efc6cbb6018d2e33873749cdda019dc2dd6946863dcf7f4d11f6e176. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA2P2159768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c4c5baa989441a7ebb9e0cde7fc59b8e7697f827b42e18aac4b95678391782. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USA2P2159767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e02a8b90cc65666601b4079f4f4ecdd9ee0b3faf07a26cad270c988118caa. 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/USA2P2159766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fff794a4abdc3c4afb891281c501bea77e5f46c99449b05f6e1f6d1f320faeb. 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/USA2P2159765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8d8a4122eff9e62c3062d176824c2fe36a7286074f81ba9fdaae72e67074f2. 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/QZF8N2126159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cdce25361c7538c937039abdc4a6c89c958ff59c371eca9f30947a4d82adff. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZF8N2126160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca9c00c0ada3dc85dae98369c7beb08b9032ba81d8b2aba92058c4aca44685b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZF8N2126161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d7bb99b2d67479c3d31209f815fecdb3a4d6cb8e016d78eb1c09b64db03e2. 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/QZF8N2126163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd91d9b00e64b2319262430eebb297749944d16e03bc020211c6a9dc2ef2b251. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZF8N2126164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e423f778ff5567593702ae970633fc7cf764f038fba1a5b3838f69940ae47d. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZF8N2126166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0626c395dff380edb83307e9b8a23a7e16e1355ce8e7b534c227964cfa237. 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/NLCK42234334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9914dbd79a35c3c85c147451b4dac101fd51e77a4a068108cb7120a47c2a203. 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/NZAM02103186.