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 0x6326b27733acbf688806dfae45b2a3d00f45967aeb2df462966ac167497b1a81. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/301b0f82-dc10-4b6d-84ce-454d2a11dc26.json and https://artists.proofprofile.net/proofs/artist/301b0f82-dc10-4b6d-84ce-454d2a11dc26.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 0x026a4c73091c5bc110a2157cc2b09606d9dfc6665c7d828893f7cd4ccf394390. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AUBEC2352496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4079dba8709209a47a9bcd30b847bfd22961303ec6969973506bc08ba0cf8ad. 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/AUBEC2352497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623f3a3c353d6ff61f959eeeacbf33cc88ad178a7d40d1c110c0c7d87bcc406. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC2347516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b48a8b9550d230ce4887fcd6bdc33cbe287f9363feb7e29f5158e81ec04561. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/AUBEC2352498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df8cd041a31c2d68b85123319ef2c8857525e088986baad8ba94a728e9077d7. 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/AUBEC2352499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb462c4c634a701681ffdf44086e250a096ab935ded80df384d43aedc52539. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/AUBEC2352500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bac1d9a44b3f1d7dbd20b02e2a4e627e94f9508b081fc49fa372e197439e43. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AUBEC2352501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f329f030b7331e642c97a7f6cd50fb66ce4c95c4acc11d7852c2b5212e51e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/AUBEC2352502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37970d6e405b7795ec5a89ca4d15f2c88a8312a5fb817ac8924c9dfff3b5cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2352503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d061be20120fc719f81f8fb229bbac6eee53c57c3845a72d5263c2f5b388378. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/AUBEC2352504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49fd17e507daa09a321361973bf40e0577852bfdd39c72a47f31f1c42a8ee92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC2352505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9077f461dbe5a03c03f0b3a49ce838a642303f9064f53439bd67985fd80def. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/AUBEC2452027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57028bf8d86159e6bcb7d79762ac591407e1b72d6f11e87e61b2229e9d9e4dfd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/AUBEC2452028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589fc944330dadd608ed37c33d690b3091c396e58c7c154c514ff0549928052f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUBEC2452029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de085c1ebcb8ee4ac8a33c6c7573a10ece880378e7903d5020bab61a74d5f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2452030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e95d82fff36dc4d9db43fac2c7f622e651a2039d2aa2d7de0de1099c24b27a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2423471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44bc8ae9203d93ef47b2e8a489dd2622dd3efd39717bed4b4244d3436ff65a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUBEC2436143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3052fd8b996195230237b2d9ad63643216c6cc9a9d2884d0639c04230180cd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUBEC2440857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c00c25d88d206ec0007f0321ed4d1b49ef13283d428fc652d70e4a2baf2979. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/AUBEC2440858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44bc8ae9203d93ef47b2e8a489dd2622dd3efd39717bed4b4244d3436ff65a0. 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/AUBEC2436143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e95d82fff36dc4d9db43fac2c7f622e651a2039d2aa2d7de0de1099c24b27a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AUBEC2423471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623f3a3c353d6ff61f959eeeacbf33cc88ad178a7d40d1c110c0c7d87bcc406. 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/AUBEC2347516.