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 0xe1114e44a07d138e95b3dc4aab184efb2748552c40ad69c03e5d48e580c50836. 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/71a80f23-b00d-4f55-a408-28107be602e4.json and https://artists.proofprofile.net/proofs/artist/71a80f23-b00d-4f55-a408-28107be602e4.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 0x24ed96830e09d421610a765f384111709bb7542e230037db52abf449a4b4f19a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX202193730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d26cd7c01644aea763ced4d9478a404694077d474d07a0cf458f622c46d29. 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/FRX202193731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab71adbdf1fef1949c1b10af9b1ba496c88c95618e5fc0b85e8d862252d807fd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/HKG732154288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bc54cde5ea08b03b78d552f3fdba40eda7b96b7b8163a33642977c9bbc8ee4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKG732158739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a72fec82b5b31722193bf0906b556f59f2bd10e3c967b5f9e1239e9482eaff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HKG731760268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a012c6894e884d1794636f9a537b51cd4a608605f783bc5e5e9400ad134b96e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:17:46Z), 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/HKG732246111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b350b159edcbe9904000ca43c443c3b29d8037b84bc1553e6b21b5bae6f45d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR10S2376786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4ee58b44653514ab13c1444592cfb1fee4bf9c13ec3c39354539226f0f2d8. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/FRX282327221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e93a7c08966fdbd78ab198e074b4d37ec7f6ba1377753802c72884df101339. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:31Z), 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/KJOUL4926452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eadb7397239d073059cba6cf5dc7bad5bce124f7547625a8ae4ca49127d45b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HKD012356389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147bdf596545f3e9a65af6e5f1d6daac53a33ac168f42d6b061dacd88f53a94a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DGA0Q2411159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb7e9cbe1b8fbb8442d15b53547e524cb22128091854c417688eade29f1a60. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:50Z), 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/KJK405850509.