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 0xd972ba22975d36f7d406cc4fec4d95300660467fce2eca798cd98d6f28ba08b6. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65ba71a8-e065-4fb6-8c29-205e96be2791.json and https://artists.proofprofile.net/proofs/artist/65ba71a8-e065-4fb6-8c29-205e96be2791.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bassweight Records: Syndicate, Vol. 4 (Deluxe)
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 0x69cfb61148ecf2c97461bfc1523381e98263640d93b4b588b5ceb76c94b171ef. 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/USLZJ2032751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a73f67d53d4cc503b3cce24c9dee9549ed93ac988b7e3581d8fa41407f503c3. 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/QZS1Z1628281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c90fda7ccfe049360e3d58272f9dbce588faf546fe762d1f75793d3c853577. 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/QZS1Z1628289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455402c47d8a91cde09e03ab29cae924da82a648b92916d938f1d1b6f9575815. 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/QZ5FN1893050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b53687f95c22944f2555dd4c2e3d0ec2c4332ee8c91b09e3b789ad2b04b37. 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/QZDA81981287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25306042cb14d5f3b758add037135a1fb744df2091a72175589dad93279c299. 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/USLZJ1712450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1626fe6044b7b5dd72b0e6264947c8d962ee2d8950909c2cc3eabe7cd43950f. 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/USLZJ1712453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c82d8002cda4b2f41dfcea048996c2e2122b48d5f793b6ff54f4ace7de04d. 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/USLZJ1712454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2b65877c926d892cc61856143b6a2e14fafb1831c8b14a2f7806289c77734. 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/USLZJ1712455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde1007058a351848d48b42ce1ef422646721281c7f334d5facbf8c4991280e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:05Z), 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/GB7YL2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95190dd222c447384607af0f097180aa70f8846b72734c0b839fd7962d410d. 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/GB7YL2000141.