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 0x4377aa8bdfd973e3f5c6cc112e8ab945be7560d244fe25ecc0006536c4a34c34. 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/cec933c9-6126-4f6d-b49a-bc244dff2688.json and https://artists.proofprofile.net/proofs/artist/cec933c9-6126-4f6d-b49a-bc244dff2688.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 0x6b10024b4eb90fa0855b2a8d4a2d47bdafc5415292311e077ee499f40aef7bea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2027724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d54090d6997befb39200ffdc120eb6c868432e33e91f6ade1df782e69387f5. 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/FR59R2027725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a964e9a92ca8c19fb18e76b994ed424fcd43e7325fc186b33a0b3a6c98b7cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R2027727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6163d49f8d98bca9e1866591b02f7475618a17f792a039b71a0bc901cebaf4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2027737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b050407d9444bff057446bf382ad67e5563922392fc4e37b6448e396ce4e23. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR59R2026399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04270eac7fa9bc801ff6b2f72186fb7c4c2cff497ea8c7dfe47f049e15f53457. 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/FR59R2026400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2873db3f1d80d611084f9abd26eb54951f67b3ecd69093e2df8780fa59b4e. 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/FR59R2026401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4463d1ac8ea31586ab7c4fa49db425fdf63e165c2df71e49af527c13151167. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR59R2026402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bda48607b75fd4fd40df05706646066bdcc7097a4280079981c853b77489f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR59R2026411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53e533360f850424884d8b9a88af5ac3559084addf1e4d69b4985da930c646f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762180440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80ae3f3730f507fdcdd4ab54a7dfaef93754742b57c2941fcfa4479b875e291. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0P2487246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde7ca23a153c5c1c52bd5f8292e34b596eae0f1ecffd9e96a387ceb61fea33. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL2DY2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b15947d0bdc6e45441c274f6a18a3505ca0013c76df820e0188d5b16b3c852d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PL89B1900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4daa510a989d80ecdc0851675d6c45198e09828bc0c10b76e4ecefbbe64ffae. 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/PL2DY2301584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4daa510a989d80ecdc0851675d6c45198e09828bc0c10b76e4ecefbbe64ffae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PL2DY2301584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c611d97dffa2ed3443021b409f61f19d948458d48f234cc4f8046a6ccaaac1f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ4JJ1738176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34372fe3fe392b6dcea984865369fe25aa6d9f51086784e1fced58dd923138b. 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/QZ4JJ1861807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651cb7c8013d45ffb2909808263bf75231a4af8eee87b0f8cec643fab008cf1. 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/PLC062364629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d0169cd0d01027fba6a2ab8a594ccee4a09f3508812c4676b97c1fff52a903. 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/PLI367059950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a3be122a470f44d97aa893eae686f2ca9edd177365917497e71cb3ff37897. 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/PLC061907980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a64a5db497eb74d6c366c011851f92fd037d61ae0d758f223d4e3cc64d3d0b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLA551700399.
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