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 0x87afd6178d10201fd8196dab89b2c151538111dd22a86a75a2b4c3c32b2d8846. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68e4ed0c-d72d-4043-af32-60c94070c5d1.json and https://artists.proofprofile.net/proofs/artist/68e4ed0c-d72d-4043-af32-60c94070c5d1.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 0xeedeff713e980bd9663aaa9d6bef14e209d6aed2d4174f3ee7cf707e9747b766. 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/QZFZ42354398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d7675cb4df90308f6ca823830bc8e118e8d5ef5fabd82e4af01d4511b72643. 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/QZFZ42354400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b270bb3f946aeb139428ca4163868bf8c15e86949741588fa54d5b95c790d6. 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/QZFZ42354404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa568374f29d9fd01d7ba2556a9064f85dcaf4f1428345f5fb6bf470e4815d3e. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QZFZ42352392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7048e2d995a0c864bffa0721ff3f8af4b0cd3da3abb70c6bc10bc7b81713f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ42352399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5329b031cf562d3967cc1f0d5e260b87e6ae949b5d397d437e99b18d2e82ed1b. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:03Z), 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/QZFZ42354437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8579710a6c301bc81cb4c7a7e318da6aa4b82ec2de741e7af27a40329427bc81. 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/QZFZ42354440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e4a30ed531dc04ed46b664ffb9dbf8e05614434b1e8a55b4333e2f0a51462. 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/QZFZ42313118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66931106340782e29db3332248f87578d97a797e8b26c9eeab55d2aff3886125. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWT2340631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6401660a9a40ec04fa3efd492893d529d6df542da90e85149fcf621cd4dbf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMEQ2460280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efef3d000bc559f6ea72cb11c89da3cb5cf29dba26ec2543f499f4b5134a0c7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJX2519348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ebd2a8041918d81ead947e710b7799710077d5f22daf3c82078c82a9f20dc3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJX2519379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47cffd1b66d62d72de481bd953eb8dc06a0d7cca67b9cc00d3c935f5e88a47. 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/TCAKA2531289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54419eda688c4e89d721a6c266bf1a1bf1a5981791b630eef536a03577be2c7a. 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/QT65X2580746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed2f741a50dcd8277a011a3c36e5f6725240ddde7e966099afbd085c8c701c. 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/QT65Y2500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14ecad494bc2726c024d88297615e46c033869ab984167ce9e9469d7b4c9e10. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT65Y2505908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebb7e39ee065ce6a3c33a0c5bcd7773fb24c7ece2c3dad0b303f7f4143ba271. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QT65Y2505896.