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 0xe7268a8a2bc13b59df096cc13daafd25dea416c08a1fbd05a22da96437e84893. 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/21c7afbf-1b64-4d64-82bd-af10ce3e2d9c.json and https://artists.proofprofile.net/proofs/artist/21c7afbf-1b64-4d64-82bd-af10ce3e2d9c.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 0x13875139cb988ce448aed097d0e100b08b3d2e97aa779d921103b083b8ad81c0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKG732502862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40d450efbdcb134a7fb39b822e494e6672fce837aff5a61e9f1fa48aa8ad38. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR2X42377554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea440f7e20f5764d9d23e1b38a4b55412e96755317deef7455a911aefbb3abd. 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/FRS182118073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb2cd7c95ab4717497fa016892963164ecba74a4d86f4a81fedd84427efaa01. 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/FRS182118074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66192d9464250b2e343268dda9f0cef8735c63c79dfa42705ad577088ec255f. 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/FR10S2113405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ca366f1778bf46c1aabf11de56d8beb25a1563bc82cbacd607ae34870411f2. 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/FR10S2113406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afe346202734eed76856a65e98ec6fee0af9cf385defe9251a031cf0bc8d266. 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/FR10S2113407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd12e0838b96eb738f673f184ec59d1e7eb674ba231ff73392e8a84ab546a3. 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/FR10S2113408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7779333c77b4fe1e9e07b30f36469cf33f1c878634f4fcb5928d4dcdc3012d9f. 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/FRX202093483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a4a85b9657745ca6cf55224b85061a4367f85c835a773533394fab00f9d252. 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/FRX202093484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887bf69719e588f7767eae6dc79853f72752e49dcdc00f760c1491f498065c5. 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/FRX282084632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c946e7d7204f3028cb463dd89143dbf79bc6d7db7a01c30be3e8e6beff5230d. 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/FRX282084633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87df0bd5a0c4770a2ab6b0771b5808e1f3d0120ba222172d93b693f77d5eccc. 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/FRX282035794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed79bf02bac5894142f4b618cd368b33ba48c293a331937144c7103d127a197. 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/FRX282035795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c70e416639f2d235f16f18d0649a2fec18cbe50bfd034d9f8bc55cd0fdb90b9. 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/FRX282032837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a8085889d034b30a8818b0eed2112bbc3af0480dfcee92bda222e1721ca7b. 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/FRX282032838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1941fbd7294a06e7c6e5480da016872b2105e38edb3f7f03dcd9e908703a79f. 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/FRX282032842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7750f8255738855a3a7ea898f44343e8bcf7acd2057e53b2f098fe7b2357cc3. 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/FRX282032843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a24853bcd1790355e23a08cbe86494315319b41351db734ecc1ff337a749507. 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/FRX282028715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12655534970758387cbfc27e4a72544b7b1cdb26b070f4a0b9b6c778778277b4. 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/FRX282028716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d464dfef53c0269e2ff41c86ba2a5440a0bcfc56dd528ca1ae951af6fc4174a. 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/FR2X41928583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1358386cbacf3665862225c20fe76fdebde7f34ddcd85563177a7b99bd67dbb. 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/FR2X41928584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ce49067286bd002ba66aed8146651d8cfc334d377f14d037f6c39ad7db723. 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/FR96X1934225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e416bd01cf13a72ed1b31a78e0b2eff7ceeff3ce8b332a4fed64f353cd350af. 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/FR96X1934226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366ef1a96787c564ac6606d9b7272c533ab63b366e44957def1ae0703cd0dd5. 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/FR96X1934227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6510d52b4a0e3775d8433844bc0ed20442b429051a38f5360f4c485f8f02e0. 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/FR96X1934228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220deb4eb53cd836fff1bb806fd63ae5c3dec6095ca342fe78fd10630c2742fc. 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/FR96X1934229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45fb26b32b499b1074473da18922c62635cac122775ff44fe6d9bb540e1f45e. 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/FR96X1914776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229e9838eb1f2bab9ce125f8ef98abc2ff9bd76a849cda53f01caeb0721cf50. 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/FR96X1914777.