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 0x45a508f284a2ed729333d7e54b248ab9136f1a766631ab0328d6b93222d05dd0. 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/af8ff2b1-415d-437d-9c7c-29c274c4fbe7.json and https://artists.proofprofile.net/proofs/artist/af8ff2b1-415d-437d-9c7c-29c274c4fbe7.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 0x7be559c07d51a1d45fd354eb523483324699e04ae63aa86311bd9e8ce3865ede. 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/JPA962380069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df5ecd738b52af40659b287e8832606d3379ef3171b2e5432b8e7d2b47333b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:51Z), 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/JPA962380070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45743d648c59f4a01da8b87ba4512e33bb8be3cfc749e2b0ea4761ff4b3d279. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:43:32Z), 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/JPA962380071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7232e2cd9e78bcc3ee603958fb0a6548477121a3c17004c56e1a47d1006214. 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/JPA962380077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1d0aa9763512f623523f146471c3249fcf9aea79f59c449b78e04628a9aee. 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/JPA962380112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01306e1eef95755fc7defe4d03a94cb5567603a8dfd457bef2a2d29f16e862bd. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/JPA962380114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fef75c79e5911e4e40bdcba0b778c4a5f955f60c1bc7c98b4c11d0536583ae. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:57Z), 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/JPVI01707000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1193a67e97ea335880060c9efd9f10c209093b50fc41db7a38abfa9cc9777a1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPVI01734860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c24b84869f315e65824104fd56104bba970b7a34154cd96bbe48be6212e5438. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPVI01734900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d26952b0a2f6027c9fc8afa4f90928624c4dadb6badc18fd2dadf65f067bd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/JPVI01734930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407b16265c0a0f4f4fd586cf0886e306276c8f548a56e299b5cfacca1cfc3f4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:53Z), 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/JPVI01734940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2544bc3a866726a251f992359af42692ef910e4c73e333bf9a6db75de405b6ed. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:21Z), 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/JPVI01802131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93784b94cd72c6ae298da8047906f5b381902fe3964365e08d9e06e12e9efd40. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPVI01904690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338614f0964dfd05cc5cec3eff00534800ea335bc8dab4f44b11c758d9e46a3. 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/JPA962380288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedf12d8e669b251bf19ae0df7c8d7d7450d7d90611622e3a05c07c48c60f5e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPA962380280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ffbfcacd86348f7f393cfba5bddcb7d5d9b15d130f7be3d6d8d5d00eae094e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:31:58Z), 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/TCJPS2207406.