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 0xdb148b2598761bf0f0057b9d7a839e7b23282466b1148e64c44da450619b73da. 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/27215486-f040-4db1-b4bf-05a09e938010.json and https://artists.proofprofile.net/proofs/artist/27215486-f040-4db1-b4bf-05a09e938010.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bessi Bjarnason syngur hinar góðkunnu barnavísur Stefáns Jónssonar
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 0xeb39de77756a737bf7116a58818f8356d8834092997d4ecac0c8ce863c49f1de. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/ISA109402106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be801c78807bcd10d84fc49649d9c20df68430a947902d53c5baee02de92a81. 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/ISA109402112.
Pétur og úlfurinn - tónlistarævintýri fyrir börn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16148ffb20bff7302af7ca194f603dd343ad20d1930dbc2497b7b0f19b071161. 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/ISA110700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e971f723af18a86a08b7b30ab57b7aa876b45fe402d4ba4ae0fd85e1749b68. 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/ISA110700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f0c3f81de8362fc6120d1adf8164ce6ec3bd3fc361b470ef52813229c3a8c. 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/ISA110700703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f207f79cab6f863134b15235da8578599b24c8a3ec3c0c807113cb613619b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ISA110700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce4d5182728d3f90faa242fd8b3aea8694731d28ebf7bdc9dadba991681440. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ISA110700706.
Bessi Bjarnason flytur ævintýri eftir H.C. Andersen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b197fc4d3237329181fc5a73470519c653a805c55721c10ca603b726d8c78df. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ISA110304701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035db9f486437031a8ca77c66095a77350935a07b2805f2624455732e1597d01. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/ISA110304702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c14031556b98ce169c353c7f28c42374fa33f613bc21c21305d2885b47aa941. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ISA110304703.