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 0x38300e93bb88c1d5704f10c432710dfd8e14c3b4f9d89f1e401dde5c50824190. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ab7f35c-0c0a-40e1-9535-ee357f0c7c70.json and https://artists.proofprofile.net/proofs/artist/6ab7f35c-0c0a-40e1-9535-ee357f0c7c70.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 0x6322543b1f216a1fefd088c3eb611c2bb63a811e405012e61c89d4aaeff54a8b. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/BREMI7100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34ddaa1fa3e3c06938f9c24d2fa591b7c63ad5c192fa5a81e94591a6ab56253. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BREMI7100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b7f2eb396e55b8e555d38a21b3007a75cee59972f8969c316c7afc158f484d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BREMI7100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8235e4bcf0b1148a7ac6d864c452d7ba3adb5c4bd19f46131dd51e3d59ef97e. 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/BREMI7200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658af6978bb5bcfe3d73a990f3daca2f00da0670a0e92361561705b93bac71a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BREMI7200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8782a5d48db54378b09b387cf6fb1561dc8346f000a41e9da69b5f0344d42e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRUM71903738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d25c802db3ee53c13fa02872706875889e0d0d9e77051a93a880eb78e6c13. 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/BRUM71903739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c09794bdc9e34606dd0315054fd8f827f06f8cc841c1100072afe6fa02805e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BRUM71903740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34ddaa1fa3e3c06938f9c24d2fa591b7c63ad5c192fa5a81e94591a6ab56253. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BREMI7100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6322543b1f216a1fefd088c3eb611c2bb63a811e405012e61c89d4aaeff54a8b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BREMI7100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49193f18df2a5bcf511cc6bb1d696c3ac97755358fa9914548b4098861de5688. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI0400744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5dc13cc16845f63fad84966c259ee6c7484363edc55efb432ed5ac73e17951. 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/BREMI7400816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294acb4f22d99cc0a13c7265edd5eee8154b5702f3f1b9198ed339ec08b1934. 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/BREMI7100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463adf29cb2c5eeacfd63475f4a15ffc1e98b8f89713822464f2d2a96ce9944c. 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/BREMI7100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe865f121d069434485f025fe27186788649d30150c43fdf8323e79fd3412bf0. 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/BREMI7100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b7f2eb396e55b8e555d38a21b3007a75cee59972f8969c316c7afc158f484d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BREMI7100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6166db1795c4bd89f3f0c93233d4826d2e2ca8cb787e41a4be9d01ff40b7b873. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BREMI7300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218cd2c1b8624812fa46dd055eaebcb8e6791261a4370044fbef49c16d164962. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI7300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56c4ec5dd1d26fd8012bdee89e322a296315448ed0f4a53ab62af592b3512f. 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/BREMI7300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707949a1372bfda011ccd1c31dda5ecb321f38c806faa86cd0a567e05b6adfee. 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/BREMI7300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889539cf08a5ff8d58d086840bedb06374c9f7935344f48a64ac46e0b0f85d98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BREMI7300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76415448e63063ccb33e1986a5047bbb18a51ee25b8c7db1b997caca467a0e6e. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BREMI7300016.