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 0x3788fef608ac8b5c41f4da6c6e91312ba8fcb951faa7f9e46540584039387cdf. 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/b0f9c096-2881-4b70-a387-64499eecec0b.json and https://artists.proofprofile.net/proofs/artist/b0f9c096-2881-4b70-a387-64499eecec0b.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 0xe9073d625923abff3af8198c84a46c903f33da002ba145bf9af303f94a865833. 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/QMFME2253745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906645f167f5d47b09f2ba220bf8357425b8f7662d9c9855ecd2cfcd6c05a16. 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/SE5BU2472771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87550c718fc310ba07fa881a62d997a9ee62cac07cfbd03a2064e4620832add0. 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/SE6HN2452196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea8e3fe6d1ecbaf22a08d4cd45b7ac8dde8f5323d261d27b2de9954f2626d8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:21Z), 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/GX5MX2449973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465f83f2483f038883c5e4a06de1d64cdd3ee8faf65caf51d968b4d8a6c2b1e4. 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/BE8LH2400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47580762110a401227c7272b8a8465dc94ec0ae3ad0202d9f0f2a922083a9c32. 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/GBMJG2517065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8766480edf0e5e35ca5d6982ba8bbf6599d36e5a6642b11a66a496194cfba68e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX452519119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55e618327df0980e6f0bcc4eeb9ee2f65863a7b9bb245e190f050e1b8e7a63c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRX872592748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739a6ef00c64da35846c170614197276832c73dc26577b0a3aeff7bfc8b62184. 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/GX38U2263939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3488c7e14fd36b23c72412ca4d840b658fa838eae8c9d37ca1be3ed92137825. 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/BE8LH2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678395e20fdf98b825ecbe5b77e46314a7cfaadb7f94569a5a228f979ca11e47. 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/QZWDD2418883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf47bb79eff27c9766973ad327f4243aa09d4bc452256cf0d4656cb7c3d8d275. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0S2474356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac5b0bb4e90585a04a3a48dacb5403edaafef9ab5ffeafa0442072c4b14e8fb. 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/QZZ7U2489838.