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 0x263163fa4c8719b6f013bd9023d207668a969346d65af37842bbb49d543723bf. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36246ad9-ee07-48c4-99ec-536651ab605c.json and https://artists.proofprofile.net/proofs/artist/36246ad9-ee07-48c4-99ec-536651ab605c.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 0x1f21d1e2950e3929a75b722ba316bca4638be96e66b53cfe076875c4ccf875f8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNA0M1911276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa193a861bda94752bd9e443a90be94a7c5da0ed4c7c528e1e9aa4bcaf6ac0aef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:02:53Z), 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/VNA0M1913355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe461d63d19c55f05b42a878b022fde50683fd65817c330210b75c1ea6a4f6e3c. 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/VNA0M1926880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e59edcae3ca8538ca381d119f21920b1abe910c2dc28d6260280710531246d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA0M1914377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb8ed09e3f26b4cbc82ac4efc7bdaf714b4fdc338e2fce71a5fdfbbd2a84c8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA0L2358661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c1013836198025ff3fd82d5f9a0a930c174be66c0dbde61415f9fb0e31bc5. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:29Z), 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/FR96X2420864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f93fef407a2bb53182dc5a288e796a4de0f611e4a8606a7fd022c8fd4f4ed6f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA2F2400889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04116e52097f5b2de126c89f9cfeb0b4cd5ce59d3cb831f72a3dcc0336acaf46. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA2F2401759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712ac76a074cea4039e7a7625da4f38bf02b69384ad10e99c1babb648d5c9dbc. 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/US38Y2555995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c4af8103559defebdd1aa09e0fdf69252d811e24900949c8ae907820fbbefc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:14Z), 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/US38Y2570778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391b208a4d85d9f9169acfc1c0be03eb66f490acdea0e860475b54a643e25ef8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:48Z), 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/US38Y2570779.