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 0x11d1e7f31db499d318b6afbe5c486c5e37d638ef0133e6bfbe04adde1953cdf3. 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/418d02a8-08a4-40e6-9164-2b26b04340fa.json and https://artists.proofprofile.net/proofs/artist/418d02a8-08a4-40e6-9164-2b26b04340fa.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 0x54aa0e2fa3e147e57e524f81ca1a73928fc8a983fab42cdcaf7ec72a86e1b5e8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARTQW2001451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff99180483122ae728ac45fee0eb8516c0a2a6fb4dc6be6f37cddd14732b0a8c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARTQW2001452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82db7ce95da0cf8e1672b89a25db377e0712662390582b9e889cb471be52072. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/ARG991004596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657925509c1c95718575741677f3ef23d2c0049543fc5add014b5ee15fc4b30. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/ARTWQ1600721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71daf83fd877f819cffef6ce8229c0d836b0f3b76a0ee560255ad101942a139. 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/ARTWQ1600722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1e8f3f0492f2339d990119116cd87664cae44a7450e1bb422120b1dda597f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ARTWQ1600723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d36849d4311aab2680d7eecbc701b85c1cf96f215d79b8312eeee9f257a21d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ARTWQ1600725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b043d08bd6712b9e9171de2d93af470206af8af07fb8592e9d1e5f3e98a6868. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARTWQ1600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4affba6428f4477ca312d57ee65fa974cdd1e533444afdefd5842a4b746d042. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ARTWQ1600728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f12a4ee194db88fa88f82d3a7b53f8d97bc114d1220dcb2cb0b1c042a8bd19. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ARTWQ1600730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeaa91dcff593ab84d9525504c6fdd44be71acbc5ebd77724f56d5baae08cc0. 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/ARTWQ1600731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef829f71853c7b737161b7401e2b012ce0c6bed5072906788ba31776f3b0f7f4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:19:08Z), 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/ARTWQ1600732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c86d9cf2eb34e6f1fc139c7a2e570008acebbdc8c67455494b7844f56f6c6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:08Z), 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/ARTWQ1600733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162cd67f6aab0e104524b27f843f9427a578a88999145ea9ab9197a075fa02d9. 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/ARTWQ1600734.