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 0x77e5958437b1e76be58ddf3cf16bd1eafd587780537fbe0183b4efe8f82a07cf. 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/98f8194b-b746-411e-98fd-ec0fcfa54408.json and https://artists.proofprofile.net/proofs/artist/98f8194b-b746-411e-98fd-ec0fcfa54408.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 0x609ae93b0a3d878337d9f6d29720268556a492151fd036e48854d6ab2fb9f7bb. 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/GB8KE2325173.
Between Worlds - The Audio Killers Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0409f72b394e37f55a2b5c09f8c423ad424340cad5351c8646d0451432e3acbd. 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/GB8KE2325174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d88f5ae08987da17442107fdaf5b3972d6a5f4bafa6f80f08da9b9f989cc06. 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/GB8KE2316528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8ae2014f446283fbde274a443d680c9a0832e7a9076aac17f7b786e181456. 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/GB8KE2316529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc3c66b17cf107410f3a6c2ac109cdc8d54a7dc90aa1d0584b69482ff25f40c. 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/GB8KE2307873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c518b91f9a4fcda34942d98e679c8909c36e6e642beace1d3bcb3dd05057184. 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/GB8KE2210145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123235dc963bb53f99c67941386c43add588c44e79f81000e629696758e3fd62. 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/GB8KE2210146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd24c54f2c7d16a5785d33df5482108eb2129ca471c5947b951491b0cc2a10. 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/DK4M62101313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b7a77382dcece62b147c0de5007f521f464ce98c94b6cc60fdea8367c6a645. 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/GB8KE2056009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55fefaee596428536937d32e35e165d0f8256e62764bf55e3db0a83ac4dbab. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLCK41076018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd63b022c86eded7707e7571220cebedb2d633ed561671512290a87df2f678. 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/GB8KE2054734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdb327175f140d404f3f778ec15e981d6e05bcc70327b414184042a5ca43ba8. 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/GB8KE2050193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7822ad33de0010da309eaa51ccb815647038d5378fc8eadca3ba06fd6fbeb047. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLV61904132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea45104beb919dd482ada23884b8011be806d4a2a8973e9e6f97d31865817b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATME81810201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c56b62336fcb3045b39b483cad109233e3f6cc4caa4bb000b9a03674a8f8282. 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/ATME81709303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412a1535892e3d8cd4588e826359fa9ff37727467f61661ba18e9517f42c7581. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE2411687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6e6b0afd1b94bc4e6e087c96b815bea7d6bae758ac44a6ffd81c66c06caa7b. 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/GB8KE2411686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d168b984c72e67cc66abcb0d03ab54e679ef569e4e68d2c512255a93ac5489b. 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/GB8KE2410704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648070135631ed3e7e93311725ba97943c868f11297c75565b6491f7c4f7964a. 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/NLCK42224879.