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 0xecb1fb180976121c999998130fd998d53027251fd172464688937ad7e5b3f4af. 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/f45f61c9-a191-47ab-83d2-da45abaa9514.json and https://artists.proofprofile.net/proofs/artist/f45f61c9-a191-47ab-83d2-da45abaa9514.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 0x826d3f441ea7de21a383b7e53e47e593c9eced4569515cf6ad1f8a55bf4c377d. 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/USHM91038951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5694a5cca80de20564329d1ef7b0d83bb60d7fafe24d05c47f5b641b0b0897. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USHM91038957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb60d8a4f3350171cb6208271f86e251c4e9e26ad0fb502e851225619cc0a8f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:03:11Z), 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/USHM91038964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9184b4a6c924b62e1f2279c26fcfc722af42b44b46a0e5fc84ae9ed0ca5219. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:37:47Z), 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/USHM91044626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab9277542ca2cc191ab263bb000b4f464dd0e50647c7c31c23c720eabd73d33. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM91044631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2d1dda1b355acd1babab3ade2041bf999f37bcfcf328e8cded300da81b349b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM91057487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc583c4ae21c8e867e70913d127cea575c4aed1f0fee20c09d5afd3ff69f4ea03. 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/USHM91085516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391c30dc05ef18324018f626ea812b535c706d4f24e4d1e5095168d7e58a393. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P1004027.
Downhome Newfoundland Favourites, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5a4b825d492fb056346a70f3e83b8b4058b3d014c2f157a0399252fd06732d. 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/USHM21151548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca1f275def18e5b751aaf4db389f65be6cfe3b271efa5a9882baa341420e0ac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM21296390.
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 0x5fa5c4633108b222d5b1cb41e6e46b4d8b5b34960dc34acaa145ec84b74fa8d2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM91076035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1657303178be4ffcce2144be5e047b284e162433d4ca85c7d9a9745555e7bbd9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USC4R2109049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f52fc6881093162b3aee9b0437cc7108530fa3bd6a4e1bc421f70644bc2ef03. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USDY41667911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397c1d3250446c76c52826f948cf7f8b7a343bd44c7b3136d098e061f9a344c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM22352934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7731177100b21623abafa3c3f3976e7eee8d70c9cd2322351112b646d74b1a7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM91087117.