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 0x3b7c543b0eaa3ce6fa07bfa598f441c02f53450e82b7ed3fc6dd11fb4b931c0c. 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/fe9d6f28-7d1e-4a7f-a09b-24bde8faa69c.json and https://artists.proofprofile.net/proofs/artist/fe9d6f28-7d1e-4a7f-a09b-24bde8faa69c.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 0x33586fd77b9a4c049400cb04e2e815ab98c58e349c8ad6c56cbaa41d304cf50f. 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/GBSXS2300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c27e23d978424b3f24ef2435beb0243b690b6b5c2cabc310ead3a062216ef8. 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/GBSXS2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143cd3254042f7a639dbdcad86e845c68c742496c10c60c2a43ae0e0ab910bf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2416046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc40c1cfac24de69c1f7ec083c9f14ae2152aa03fb0ae3ac3fd88675ec4f53e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2455230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ea09974e48fc2228a16f69bdaa653c245d03e50d43a2684e85fb868381c48f. 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/SE5752472001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031c9bdd1e94c1962baabf4b3723885058202394f1996a2d22fe9aa18557a3c2. 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/US38Y2403942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc502c4cb6f603ff1716610d0e266815ca05a1ebff9079b308e9cdd86a6ebe95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFJ2385078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd5c379a399e1b639746816b6bdf0ce2d536f9c112c6431b8b3108bf7a0351. 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/GBLV62318767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3aa4bc7a0ba42ce59e398c7d6c68f654c1425bcd49af98f787895856163431. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62302593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6eb688b241734c8b5866797e8696baff2082c9edadc76d030706d4b63fc2a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPLS2343107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dfface89b2955f1ad6fc57cbf96d2537879a5dd05cd87f5a7672524b51e448. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMER2337231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b1cb43c8302ffe608284870f5b08da77fa1df0bc6140af2f89e281b1238569. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452146130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777755144b3f1a7b6d3bed904a7df4697cbd5f1a2a6a92f6f1bf5a5fad8434c0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282109851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290038b5604b17063438487727e8c3042d7b478bcca8a875b458992f9a8dfb4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB72305775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d476f51b5bdc33391e6012d2e158572feaea301f662d3687558ae8588deb5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB72305776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15342e7ebfb3431756fe7d477451c2abad301f11775c04176984c433085bcd06. 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/QZTB72305777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e516d0e195d129d0ee7b219a1c6f91a5004cee80f717c810671b29614ef9c8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB72305779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377a3d2610942484538e916332a418d242072656af2001db9d2d596fb214014f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB72305782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1810e032f569ca52079918be09265a58ba211ea8292ca3333df4ce25c92159. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX452238584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc42f36f92ba9d6f726cd720894afcef636154fda048754fab5edf5e62657a4. 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/FRX452238585.
Nothing But... Underground Drum & Bass, Vol. 19