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 0x2129f6d9283288b104f79ef1ce6f257a89b65ccbf9d60eee9c7a9a2a771ad87e. 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/0968918f-dddb-481e-89ce-7f07e543b7f4.json and https://artists.proofprofile.net/proofs/artist/0968918f-dddb-481e-89ce-7f07e543b7f4.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 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 0xa72cc54215b7203b261839b8a1df96bd9db7fcdcd55e53aca2d0fe664c4cbbf6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKQ4A1831601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50511c819bf2b6669c37a3162990a43e1dfb25d41a217b32a46a2e71180e9986. 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/DKQ4A1831602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4929f3fffd3545d4c10dcef08ffae3f0d34906f95c7c0082dc8ffe1c63bd2543. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DKQ4A1831604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfed6b8ad5a2e0025373dda37ff7d8651cf4062ebc3e8269a68dd70accc349ba. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DKQ4A1831605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce070f407dd4a187b85d387097c93c881e378f1b0774ee375d15dc268a9183e3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DKQ4A1831606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb22381aceeffb7631e3e5fde68033068089b4ad6be39ee74177d39c72f3d80. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DKQ4A1831607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc90dfc9bed586da9bc2a724cc833046015522870d02ad81a3368329581664. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DKQ4A1831609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaccf3c102115544cf747974f35325450d85c94b700156b33c65b742a52b5971. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR9W12044000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1efbf907cf8ae647c958b72db6016be5f1466668f878fecba2d4a1edeb13755. 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/FR9W12044001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1fd6b8e95c54270a33cedcaa8d2bbc28b91c1120d0b920687223792bac89f2. 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/FR9W12044002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5eead5ed682873d04ca024b97cb0843b63cfe0068c0659449cdc52c14ab42e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12044003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d89af46e2e102c0f223533e13fdbeece619914f53730c7c101994b60b87df2a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FR9W12044004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11ef73c17f0677998bdbf8af35630461e659df6fabcd19540d472f8c9d07ef0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR9W12044006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1dc5c5f0e0a566c79c430fbbb447b72c4a8e38376216055a0b725129a872c5. 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/FR9W12044007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9780943bb19b168bdfa27e559cb641cc4df9d7a321255f2d570fe0e0cd9e714. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR9W12044008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a7dfc2059b0baafdfa6a7fcd3465115cf2ecb71c9f650530d029118a1478a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR9W12044009.