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 0x253790ef501d2f06104feeb8772357fb10cf66699ea2524a9d730fc72b21b36e. 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/d7746308-5b94-4772-b949-f684bbdcbf7b.json and https://artists.proofprofile.net/proofs/artist/d7746308-5b94-4772-b949-f684bbdcbf7b.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 0x0bdbf25b14071a77e2d143ab822c10a4ed4861b61cbfe50d58ec308b06f1985f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd45010725eca696600ecd6f2561142e7abd9ce0f1ba34f0f35c3bd56e78f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12102705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b3a9e00d50da56c7ca50396827cf2c52b71a94ed55e38aaba7d3eab120e30. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12103799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e89210327bd85e955e79e86bff84529f39eb8ce17a3372495f6a1582c74dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cd7b65e7aa80b4d49a49e9ac1c675b3e0fe01205bd998fa033eea4d56df571. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fc8bf685fcbeab0fab46bf1611fd18608b8ab757e46619dac403f02328831c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd254bb5bcbd1634c659b80cf7d47e5dc02ce3624fc14036ae2b59d737048e761. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107aa28e7bd3148a38e69fcf625da6d5e42ef7244003c959042ac59f33707dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452e2fca27561eddd3716ea87378538fb58feafef39073f7e756ea581e8245c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fd1364b1da233d453f894319f6013deb22ad7ed8352ed60d42bf633c3036b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12203276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5854df16631d8b9aef61032df7fd85d32545a35324c5694ef557ed001504e3c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC12301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd254bb5bcbd1634c659b80cf7d47e5dc02ce3624fc14036ae2b59d737048e761. 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/USRC12203277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d064f8290df64719ad92247014fe4be2ec1513cdd4ff35d88893be86021a4a. 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/USRC12203274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b3a9e00d50da56c7ca50396827cf2c52b71a94ed55e38aaba7d3eab120e30. 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/USRC12103799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffd84b99fb810c47a08a4945ff37d7addc8e17584b4490679f79bc7930437fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES92006656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2564bd3df702da3fbf084e604cc8d109b1e79bbfe143f59a23abe110f564ccb3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2044534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74493d36ff4f76a6a14555fabae42ed59e9a1fcc0c7f547679c9184c0220e7fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2049397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b5dc479e04c1577a131d7e555ab791d06c9d322fccc0627c69fdf7d97890c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2066518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7307568859eb54b5888df15c3c9ca749c1384427d4bad53b7b28457a805e444. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEM2049398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217e5baebc9e0535796d31a8560472baf34093d26534d3bed8a2f53d7cebe81. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEM2049399.