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 0xdc145bf47b7aa04b5c43c11c346c685db64ebff7c371283524935d7e82dcb048. 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/518bc598-f2f4-462a-8dc5-966748b29469.json and https://artists.proofprofile.net/proofs/artist/518bc598-f2f4-462a-8dc5-966748b29469.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 0x7545e686dbd7740fc7b2e5e2f81c62f7870adf12455d95bd08980aa06fb1d1d6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:39Z), 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/FRX452125252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d6742ab57b20d28d1d0a03f94f56a83504c2ebc393253af79b54bb03f7d51. 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/FRX872187036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7740ea6432ec775c0b5518a403e47f7a9e54b97e1ebc979583cfd727984d7c21. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X2221887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbc7707d2378828cac52eaec64abece321efeb390615ad1e8b4421b4647e19. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0P2313976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79670f199889f2637b962ece9b10a595a73305442db5a61d7e6be4ff1c47ceb. 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/DGA0P2313977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfeb2487241efbd71e4fa2cbae7028f0a168af417e6c8afee569f5c675cce23. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DGA0P2313978.
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 0x3ecf639b7135bcffc7d853a9b8f681861ee6ebbd30ed6a646941b820f71cf5a7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA0P2313980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fac5f2a7b4da786d233730bb31e28f550d86211ca28e2ed2ca2e145d5d479c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DGA0P2313981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e390648a2b35019202ddb54bf4f979b9671343a522c7039d85de0a97a380c4. 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/DGA0P2313983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6e97421b1272b1b0239d62a38c377b8bda0cba3f72c25ec67778fb16f90d8a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DGA0H2311228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486fa2d535f26ca7907fcdc28819a2e095de3c6fa4fba7a703625cb0ae4f8bd4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:48Z), 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/GX53U2471265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd925ccec9c44f62aa48ef3243dad12b0b42bbcae9ced6268317d4785d409e46. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK8LM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f9b28e600d463df3d101abd285b8f778c866ddd7c3b8083398df45360a545f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BCO0F2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ab54febb9450dd034d6daee26604071cf34586d6121ccf78855e937ce578f5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BCO0F2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55759259be5b99c020bb6a5a7b3c31a1618854d348270f7fddee92b8870c74ea. 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/FRX202599273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c32ab003f9bb64646b399b33ede01b4e5c98c4aa9f77327f726317cb74d9a83. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXYVJ2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c35487120e3d78fe7cb708f5d51e11bf969c731cc3c1601575f0b67ebdbbe4. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZ5AB2313049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c46df7736b256ddb61844d879494acc0547190f3f1e0cd4dd5d3970eb842c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXD1K2000001.