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 0x448c57285711ce280bc0ff31e1c76a6aff702b7d065facd6fe413cf47e729734. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bca0491-9674-40af-b84d-8fb5182fc738.json and https://artists.proofprofile.net/proofs/artist/6bca0491-9674-40af-b84d-8fb5182fc738.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 0x37046d5b100af3dbf7fa865e3bea6131680462c3d4e09294db7bde8eb3b68465. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:12:33Z), 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/GBARL1900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad16d177358424f06ff0799f51bb9bc2cb85e422b3af0df73fc5bfdf1e6058. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:54Z), 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/GBARL1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931f3cf2c8737c50f96a64d9161d9953749af086057cfbd72fc587700547e9a2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBARL1900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1d703489a9431316d686daa0d449d4b1182681f170cfe528127ae58aac220e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBARL1900670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ab28299039f6acc50ff4b5264c8cf53200bef23df00de56f810faa9a893b04. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBARL1901167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ae99091080fe8df3b5745ab0cd0d185c7d482da35a353b7450902700ebadb7. 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/GBARL2000191.
Homerton - live from the Royal Albert Hall
hugo: reimagined (live from the Royal Albert Hall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428c5f5b1973d3432bc668ae8170cff7e8fd7e2a077c62ddef246df2e7d71ba. 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/GBUM72401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3007b4052e43dcf024b379f6ae2a1a537dedfb0d0852de760b53365bad326fef. 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/GBUM72203076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86d2b44a06d64d7c430e5d3ee89946ac89bacc12f681afd97bffac5329e1dac. 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/FR2EI1503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3007b4052e43dcf024b379f6ae2a1a537dedfb0d0852de760b53365bad326fef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBUM72203076.