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 0xcdc8560966d69fcd69874b9572d0ead21fa13008ecc5f0ef0c81d571e13a9bd5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d03eb185-63e5-4eae-8a66-ad9043af0fdf.json and https://artists.proofprofile.net/proofs/artist/d03eb185-63e5-4eae-8a66-ad9043af0fdf.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 0xfd9d8e8745ff0758947fac0add2fa7e0fde6c53efcca7dac9d0806e353c37e96. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJF2588764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601dfb3d67062b14c03119ea27e050b26722161994bc65c8b81e47eb60c3cc3f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJF2588765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0829028912a5825ead6c67ce8a18ff093317959502af85042fd2293bf0ebb239. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJF2588767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c269c03c1c3b7d1f23d0bcf88f84c15af686388a7835a4ee178059f4bca180. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:20Z), 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/TCAJF2588768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c94f46796afa70d1557a74cddf32ca3167890f754afc1ba53f6731b98cd31a. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAJF2588770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cbb22ecbb2e12540132ea40f5550b889825b4da324e65eeeb100ffc62b5379. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:14Z), 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/TCAJF2588774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9d0db9b68ef2cbd414e73c11e06f1ba018bd581a435b9c31ebfe82b5b61a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJF2588779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f01a3ceadfb2e41b64fafade8a5685c01df4c5e8e30d94d9cef0a0fa6397e5. 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/TCAJF2588781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8940933ac62330e7a0f56e3b8354815e009fcded6949600a16013d8eb7da3cb4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJF2588782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cc01221e975b3cad2360f2a6464a75214b77a6381591dfe4047520c736205. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAJF2588788.