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 0xc9f81666e1bf10928340631a21dd81d81511155fb0828898b538789c165c2701. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa9513d3-13c7-49e8-abe1-d9143c5b9088.json and https://artists.proofprofile.net/proofs/artist/aa9513d3-13c7-49e8-abe1-d9143c5b9088.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 0x530ba1fc6e0fb9811ecc73de06cf94a9890028b9e5fe7fde5b9f039a06900d2d. 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/CH7812224608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5cb0810fab71740f2dd889ecdf7d57f7846dbeb6163ef9257a6ce6b47acf58. 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/NLRD52416711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f402daff0456becf3f80588c1e2e1565a28cceca308ee5fd5b5d5f93b02eed8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52416702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba3d00a320937a9d52f410461ab88f067028e265eadfedc52b4418346b72a1. 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/NLRD52403864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088fcd70df6d0989a47025a01a3aa63f40c196621ae99a7c82dd714c43fd51c. 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/NLRD52303865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b79f3c0f82fef2826248b1c9debbbf8cb18c660def678aa49d93e81f0a09945. 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/NLRD52303964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc0e33366266cc529ab5d772805ec57b2e8a2b2cb749b922ff1cb86ac61732. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEGA22303954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7025453a2745b5f97539bd5528b09c339168db9a03b9ec4fcf043dc5dc976909. 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/NLRD52319593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573aff9997ff3523a64bbaf1b53143028833a485dccf5d237d7643e555a47b67. 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/NLRD52304014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e97544a3ab9c1de7bcf113192d751fafba8a8894fe7d0f21e652a54ed901fe. 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/NLRD52304026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026409a2e71e770999fba7cc209d08cd88b8f495f95699e4d96dc78fd15d1e0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52119555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820786b435977cccf188d5b3412568843582c72248c379ab9a1e729aad9f58c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52119557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1728cc8ccce2fc7df40ae88cdca505e66bf261254b94a141360e9a143ebe5bfd. 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/NLRD52119528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c24df490c61b4a05d17069823082e382104c0f4ffb8d2dceda6b0417c5a6b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52119516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdafd8fbd4d6cafdb71bafb431081ebcfebde6b5add0d1462afd46615907ba7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52119499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581016a3c42bb7e19237bc8b79f322cdc38a18b1d3bd7a5810b90ae40e444f36. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812213621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7dab26d74e62e022ea8b202b2e43a08692804438ec2c7dc376471499ea9838. 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/CH7812106040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb003d65410a8f596da113e63567dda05341802dec362c92f2d5f4f59ba3b177. 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/CH7812193456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d40d45777d35acd038dd37af8ac17f2ad0a86dda80a7c3b80b7de89ce98091. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZP7F2116499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2c4aac52da9f15c25f4e3036f6c628090c1c87e4f975dc7b9a45a6ce0ba41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812183099.