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 0x69ae583a9816a85c527a8394bab2e502eae9f53b525a0344125066b72ee49c50. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/466fe2df-dd4d-495b-9469-5c0b0d26bc31.json and https://artists.proofprofile.net/proofs/artist/466fe2df-dd4d-495b-9469-5c0b0d26bc31.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 0xd2507c770b9d3583ba04d1ac7e43c1b5804a1aceea4343cdfa1e5e4d7ccb97b0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6Q2222633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2507c770b9d3583ba04d1ac7e43c1b5804a1aceea4343cdfa1e5e4d7ccb97b0. 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/QZK6Q2222633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa3e22f5cd6369cc582a78243dc6d12cda269345632726bc73df950f94cb8d2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6M2254238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa3e22f5cd6369cc582a78243dc6d12cda269345632726bc73df950f94cb8d2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6M2254238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a2bc19b7f915d7845a670d9fc419ba952dfb959c964436d71cdb0dfe0012e. 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/QZFZ62357535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a2bc19b7f915d7845a670d9fc419ba952dfb959c964436d71cdb0dfe0012e. 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/QZFZ62357535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2ddb3e5b32d0431d24cf18471732ea42d2df5863f54da843fd2cb7227669b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAT2464787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2ddb3e5b32d0431d24cf18471732ea42d2df5863f54da843fd2cb7227669b. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZTAT2464787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1b218548c5fd3401504fb1a497b3ea03a0435d3d2d44614736d30ae7f2f92. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB62443120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1b218548c5fd3401504fb1a497b3ea03a0435d3d2d44614736d30ae7f2f92. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB62443120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c40bed8f2ae02f9304e3e4f291d3fb9e893859349f3a74a097d0dab9fa635cf. 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/QZWFH2419789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c40bed8f2ae02f9304e3e4f291d3fb9e893859349f3a74a097d0dab9fa635cf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFH2419789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43751488ebbb7e759662a2c56328df8f659f04987ecdc1b39297f2fdee8b3a. 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/QZTBC2417763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43751488ebbb7e759662a2c56328df8f659f04987ecdc1b39297f2fdee8b3a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBC2417763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80cedda3d1a645d43437cd692029f122f6c2827b1cfc0f58f791335269d224d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZWFP2467290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a9a92e36f20adc47795d17cdb11395d55d673a64993656ad44eefc2f94e512. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFYZ2502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a9a92e36f20adc47795d17cdb11395d55d673a64993656ad44eefc2f94e512. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYZ2502480.