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 0x24cd6790260ca9a7f990b93786c01115e2c4d5dfff7ec89ebc67685030dd43b7. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebf78671-ece0-4969-89b5-f685e6194b7d.json and https://artists.proofprofile.net/proofs/artist/ebf78671-ece0-4969-89b5-f685e6194b7d.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 0x77944ee996d9f7d7e8e0ff3458eb85504d01952e63cf26c8971f59695d897b3d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3FG2528750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16988e3dff5b121a09a1273f026c8ee820878f86e0d453c0608a74beda20649. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:40:34Z), 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/QT3FG2528698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a88ec263338ba5febec7c434e0d29a8cbf109d9760b0baf7a08c3e990c6f0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:06Z), 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/QT3FG2528753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c07e35bd16fce1155e1e44d5eb8ccba3dff9baeb2f5c09def4f83b7cb6c8a37. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:21Z), 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/QT3FG2528660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c03bc96434cad5c75614595c2f04247901c1bb4c2273606acf3c23dbd5820e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:30Z), 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/QT3FG2528749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06224461aa2ae0105604f613da50e4aad671720ed8e7e2fbfb2c790f8d5e36c4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:32:16Z), 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/QT3FG2528680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31effffab4f9e0b31a535e8f2b3cd0d2df7b18fd4f16a28f5582ecc52827f65. 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/QT3FG2528813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0832f7708caf99c569ddfd9c5ccfeff263c6227fc8f0616b91aef9bbae71089. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:57Z), 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/QT3FG2528799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540bb70f8ff69b31c8cf9a210294c4c72948e00fd0e7a5a6e16a8110014b5e6f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FG2528825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5ac714f084b4fe3b9222775ad7b2c02b6b090d08f8c11dffd114c75ff459e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3FG2530779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00da0d3fb94f74afde692976c5456d318927586b42215f9fa2f43609bfec1e1d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:00:55Z), 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/QT3FG2530792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560d7e7979e5f6aef281a2ac062bccc3dc439f8f48c0ec981db054bae614261d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:48:52Z), 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/QT3FG2528831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e16100c42ce238867a7fe241640f0a34234fb82791dc3ae4e56f370ea4f19. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3FG2528807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fd595b9f0509505003b063132a06cba2c4f90a0ac4ad94711f003da9788bd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FG2530777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86753152a08190cd96047300661d6fa5fe1b9de14b05006cf07b799492e56948. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:22:06Z), 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/QT3FG2528801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879807a437e772d5183b0522afd8384f5bb009799548bc8a9dc7275aca21f2b2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:13Z), 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/QT3FG2528899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3584058425ba9dcd3336c0ef8209e1a09c06dfd6db29f6eb93266e5fca2dc662. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:46Z), 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/QT3FG2528872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef49f14114a1c7f52f320de9c12ac189290ef374a47587e9d29ef32441df20a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3FG2530794.