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 0x00cd2d05ca5602bf05a85abbb8548d7b28f35fcf90340164502a08802e7dadc4. 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/22765e5d-57e1-4ab5-9636-5a4fb5d25435.json and https://artists.proofprofile.net/proofs/artist/22765e5d-57e1-4ab5-9636-5a4fb5d25435.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 0x89dedbf12da511264a2b7fb5b24b0c262116b46812bfa7b8c07a95fbb21fa5cc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZAMM2299951.
World Without End - Stringmaster Vocal Rock
World Without End (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1119dedb290191b4bf0ad321bb924ef9b44bce08723ce83eb01c36b8d80016. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAMM2298314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef306329e36ce323b3aca0793a617f678049e8d3c96c0f474f6fe65b8387c47c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZAMM2299384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7023f4d868166f24d82f7b1f1a7165d39edb010b3f87a3db1c0bb4e1e96f71. 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/QZSR42202909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dafa0c2e915448e014939f68849d98a5049639fc9816a2fbbc9a070157c42f. 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/QZAMM2298995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f0385357eeebdc5ebe67e6ee1acf2218e1b9526b39af74e799aea4f6bd86a4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZAMM2299224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7763aa07f4b62c7997c41876248920194513c7ab09b661649985e5985608f5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZAMM2296701.
Expulsion of Life - Stringmaster Vocal Rock
Expulsion of Life (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86546ece2a9c151796ba2ec85e9c702443071980b81035926b587dbc32f1ca3a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZAMM2295930.
Sick of It All - Stringmaster Vocal Rock
Sick of It All (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7caf0814de5642da673058ab40afbc9d9f69f02fd08c0a66437adea2431b57. 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/QZAMM2298511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22706768d2712151a869efb97682eb75337dc53a121eae54cd62f5addeca0d. 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/QZAMM2295931.
Aftermath of Souls - Stringmaster Vocal Rock
Aftermath of Souls (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1ec40077cea88c20fb1353eb743188e36e8c900467690c77a6ad7bfb8d7dea. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZAMM2298510.
Brothers Forever - Stringmaster Vocal Rock
Brothers Forever (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc777a042ef032bbc67088e2addad7613a2f773240e091b137615d8f13983d13. 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/QZAMM2298313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19feeec53458885e837baadd2d22febdc037507af212c410670e1ca8700f9ec8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZAMM2299223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9126239b7ea55f0f488b049fe6fbc4eb6b9daf0937cea00a465cfdd16d170d6c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZAMM2293709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee2d3c79c93f8154c1e999e0e1c6f298b09a941ec518e05897dcfe9c48f914c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZAMM2244112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438bf2531860adae87277b02653a454635a19b3027deb9d5f6e5a6de677c3ab8. 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/QZAMM2298013.
Stuck Now Like the Sunset - Stringmaster Vocal Rock
Stuck Now Like the Sunset (Stringmaster Vocal Rock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34cf081bab4ee36ab6d91f5328aefa26e21fc7995eeaf954214edbbde10c7fb. 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/QZAMM2298996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d822642e643447093e4176465923dee7af76c63239855b21fd11934af92ad0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZSR42200976.