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 0x6e4bec596fc89696cf1fa07aa50ad655a64c317eb3e7ad88ff997b984c1faf32. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1627e5fe-28b8-4478-83cf-63432df0eabb.json and https://artists.proofprofile.net/proofs/artist/1627e5fe-28b8-4478-83cf-63432df0eabb.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 0xb20e8b7f9c397ed8d943e00a4fd1c79d4654b4efe15d3fa6e1df33cb90e3e1b3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZYHJ2417249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a1280237101f14f8f12d69a3d209ce049d85ccfa2111738d455f71cd6aed3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZYHJ2575214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29849171b16318ccad3117f2e04b853c575a76eacc8ea6d7a38b3aa97181d8e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZYHJ2575844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf971a5e9d1fafb4337fb9119f18ef9003cde8e4f08fd00d53b8d9a39a4a76c83. 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/QZMEV2557135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5c0fce693f057fb1f3a2aa7611ac310c8b2271eee3f85df7a0f6d90a9b035. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEV2566870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38584d0995d9f933a9bdd45e839cc4647776073764fdf5887e6f8e49e05374. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEV2562766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d6abc777a6dd51020734d4b067a37b5c30b6a64f57db3e3c20734a38afeded. 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/QZMEV2590514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8843c4463c5a9736a82f76017b2a0c6f25e22a1dad3cf000791cadfdac80e8. 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/QZMEV2597409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0071f27d50e216dcec7213167da9e2b78d5146ae8ae0231bc9ed4f6fbe26975. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMWW2529740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee02daa77d109aba03c1e389620e98ad2171a11d12e92a378097be908d81976. 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/QZMWW2537741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1f360ab6d3bde527c294429d3f61a51128e57e9878fb39b70f0e17780f5a2d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMWW2537785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89331357e209da988a0a4d803e072c0a3172b79fb8a221b7d13559af9f224f9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNB82521992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ae6c2110296949e553e60a7f7d8e7d3c980532959099e5ef2a93f3d7afd1d3. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:53:52Z), 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/QZTAY2545332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707356bae7cf2f8dc006b82994075501fc8e8a19b6443795cadb978ce9d6917c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB92582698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcde368f9349b72165335075e967e1d422a3d7d41654a202d0469e5b18842e6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFL2510004.