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 0xbff71e92a6168cc0bc5b4275887f091ecb8b26b9c86bbd454ac8c026abc8e52e. 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/28135b64-86d6-47f8-a685-d2d411e7dae0.json and https://artists.proofprofile.net/proofs/artist/28135b64-86d6-47f8-a685-d2d411e7dae0.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 0xcecec9cb153601676e0e13870ed22e5e6d4c7d649ed3920455d90ed9b5991fb9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR2X42401930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed42e3b5f2686fdf2b1fcaf436d567153ff51997906e7ba835ff4598cdcbb90. 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/QZK6M2367919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a131752b022d57465e606f2d504f46a427250f83034c6c3410c98ba29231fd. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:56Z), 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/QZMEQ2367066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaee27a9fb6f98532662c18f56a8f60ee8ae5ea19ab82356c74a6383b6421e7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA072383886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459bb4debdaecc3e802f0609c55f658ce6c41f05f4c8ae45e9798cabf2d1839. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:49Z), 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/DGA0P2382115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9e5947f3139567b4f436d708478a4e3a7d64e7f6305b8d898543adac9735e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR2X42453359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd642528a0f30972c3996dd7b28747aa8761838631dbee4351c97493ebd7d9b49. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:25Z), 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/FR59R2497256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e79e5f408740960861983fd88efd42e9d12245493c00d2bf49de2226a23a02. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR96X2434830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cfdad3b95a9a7797fa100e50d7b6738c48359bbee50f936671b9566f34711a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:50Z), 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/DGA062486413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb6c282899cc1cda723a1e973796cd22d32fa2b3f956085d9ef1ccd44ffd391. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:15:33Z), 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/DGA0L2427361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb194b25dd35ac69c23e2b10c9c2348acf6aeda37fdfbc3edcf9efe5d78e161. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0T2465532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013a7a806812037f023bbac1f9e1fec93642bb74b0e5db0f3cfdf241b71dfad. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:36:30Z), 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/FRX282519502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c51d5f007c0b15b71cd09e7d8fb1d42e573034ab9de08f7b0d414a701695f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452550377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001561e704e927c73cf0f63bd711091f66013471a342f28eb5b4a38f27291fcf. 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/QZDA72322830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a092a1f94510e8cf685dba12192c92c73eba323856647723ea60018657cda0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZDA72322832.
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